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Changxiao Li
Key Laboratory of Eco-Environments in the Three Gorges Reservoir Region (Ministry of Education), Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation, College of Life Sciences, Southwest University, Chongqing 400715, China

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Journal article
Published: 23 August 2021 in Biology
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Plant and microbiome interactions are necessary for plant nutrient acquisition. However, relatively little is known about the responses of roots, bulk, and rhizosphere soil microbial communities in different artificial vegetation types (woody and herbaceous) in riparian areas of massive dams and reservoirs. Therefore, this study aims to assess such responses at elevations of 165–170 m a.s.l. in the riparian zones of the Three Gorges Dam Reservoir, China. The samples were collected containing the rhizosphere soil, bulk soil, and roots of herbaceous and woody vegetation at different emergence stages in 2018. Then, all the samples were analyzed to quantify the soil properties, bacterial community characteristics, and their interaction in the early and late emergence phases. In different periods, the weight of dominant soil bacteria, including Proteobacteria, Acidobacteria, Actinobacteria, Chloroflexi, and Cyanobacteria, was higher, and their composition was different in the rhizosphere, bulk soil, and endophytes. Moreover, the soil co-occurrence networks indicated that the weight of soil physical properties was higher than chemical properties in the early emergence stage. In contrast, the weight of chemical properties was relatively higher in the late emergence stage. Furthermore, the richness and diversity of the bacterial community were mainly affected by soil organic matter. This study suggests that these herbaceous and woody vegetation are suitable for planting in reservoir areas affected by hydrology and human disturbance in light of soil nutrients and soil microbial communities, respectively. Additionally, these results provide valuable information to inoculate the soil with key microbiota members by applying fertilizers, potentially improving plant health and soil production.

ACS Style

Jiajia Li; Lijuan Li; Muhammad Arif; Dongdong Ding; Xin Hu; Jie Zheng; Zhongxun Yuan; Changxiao Li. Artificial Plantation Responses to Periodic Submergence in Massive Dam and Reservoir Riparian Zones: Changes in Soil Properties and Bacterial Community Characteristics. Biology 2021, 10, 819 .

AMA Style

Jiajia Li, Lijuan Li, Muhammad Arif, Dongdong Ding, Xin Hu, Jie Zheng, Zhongxun Yuan, Changxiao Li. Artificial Plantation Responses to Periodic Submergence in Massive Dam and Reservoir Riparian Zones: Changes in Soil Properties and Bacterial Community Characteristics. Biology. 2021; 10 (8):819.

Chicago/Turabian Style

Jiajia Li; Lijuan Li; Muhammad Arif; Dongdong Ding; Xin Hu; Jie Zheng; Zhongxun Yuan; Changxiao Li. 2021. "Artificial Plantation Responses to Periodic Submergence in Massive Dam and Reservoir Riparian Zones: Changes in Soil Properties and Bacterial Community Characteristics." Biology 10, no. 8: 819.

Journal article
Published: 23 July 2021 in International Journal of Molecular Sciences
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Submergence impedes photosynthesis and respiration but facilitates aerenchyma formation in bermudagrass. Still, the regulatory genes underlying these physiological responses are unclear in the literature. To identify differentially expressed genes (DEGs) related to these physiological mechanisms, we studied the expression of DEGs in aboveground and underground tissues of bermudagrass after a 7 d treatment under control (CK), shallow submergence (SS), and deep submergence (DS). Results show that compared with CK, 12276 and 12559 DEGs were identified under SS and DS, respectively. Among them, the DEGs closely related to the metabolism of chlorophyll biosynthesis, light-harvesting, protein complex, and carbon fixation were down-regulated in SS and DS. Meanwhile, a large number of DEGs involved in starch and sucrose hydrolase activities, glycolysis/gluconeogenesis, tricarboxylic acid (TCA) cycle, and oxidative phosphorylation were down-regulated in aboveground tissues of bermudagrass in SS and DS. Whereas in underground tissues of bermudagrass these DEGs were all up-regulated under SS, only beta-fructofuranosidase and α-amylase related genes were up-regulated under DS. In addition, we found that DEGs associated with ethylene signaling, Ca2+-ROS signaling, and cell wall modification were also up-regulated during aerenchyma formation in underground tissues of bermudagrass under SS and DS. These results provide the basis for further exploration of the regulatory and functional genes related to the adaptability of bermudagrass to submergence.

ACS Style

Zhongxun Yuan; Xilu Ni; Muhammad Arif; Zhi Dong; Limiao Zhang; Xue Tan; Jiajia Li; Changxiao Li. Transcriptomic Analysis of the Photosynthetic, Respiration, and Aerenchyma Adaptation Strategies in Bermudagrass (Cynodon dactylon) under Different Submergence Stress. International Journal of Molecular Sciences 2021, 22, 7905 .

AMA Style

Zhongxun Yuan, Xilu Ni, Muhammad Arif, Zhi Dong, Limiao Zhang, Xue Tan, Jiajia Li, Changxiao Li. Transcriptomic Analysis of the Photosynthetic, Respiration, and Aerenchyma Adaptation Strategies in Bermudagrass (Cynodon dactylon) under Different Submergence Stress. International Journal of Molecular Sciences. 2021; 22 (15):7905.

Chicago/Turabian Style

Zhongxun Yuan; Xilu Ni; Muhammad Arif; Zhi Dong; Limiao Zhang; Xue Tan; Jiajia Li; Changxiao Li. 2021. "Transcriptomic Analysis of the Photosynthetic, Respiration, and Aerenchyma Adaptation Strategies in Bermudagrass (Cynodon dactylon) under Different Submergence Stress." International Journal of Molecular Sciences 22, no. 15: 7905.

Journal article
Published: 17 June 2021 in Science of The Total Environment
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Riparian buffer width and stream channel width have different impacts on ecological networks (e.g., plant cover, regeneration, exotics, erosion, habitat, and stressors) and provide various ecosystem services. The protection of riparian zones of increasing widths for higher-order streams and connected tributaries alongside mega-reservoirs and around dams is of great global significance. However, it remains unclear which protection strategies are most effective for such zones. By applying a rapid field-based approach with 326 transects on an inundated area of 58,000 km2 within the Three Gorges Dam Reservoir (TGDR) in China, we found that riparian buffer areas were influenced differently by broad-ranging widths. The riparian buffer width of 101.84 ± 72.64 m (mean ± standard deviation) had the greatest impact on the main waterway, whereas the stream channel width of 99.87 ± 97.10 m was most influential in tributaries. The correlation coefficient strengths among ecological and stress parameters (independently) were relatively greater in the main waterway riparian zones; the highest value was r = 0.930 using Pearson correlation (p < 0.05). In contrast, stress parameters revealed substantial and strong relationships with ecological parameters in tributaries, with the highest value being r = 0.551. Riparian width had the strongest influence on buffer vegetation scales, high-impact exotics, and bank stability. In comparison, channel width had the greatest effect on tree roots, dominant tree regeneration, and agricultural farming. These parameters showed distinctive responses in the shapes of indexing in higher-order streams and connected tributaries. These observations confirm the urgent need for research on regional-based extended riparian areas managed by the same administration strategies. Revised guidelines are needed to protect massive dam and reservoir ecosystems from further deterioration.

ACS Style

Muhammad Arif; Muhammad Tahir; Zheng Jie; Li Changxiao. Impacts of riparian width and stream channel width on ecological networks in main waterways and tributaries. Science of The Total Environment 2021, 792, 148457 .

AMA Style

Muhammad Arif, Muhammad Tahir, Zheng Jie, Li Changxiao. Impacts of riparian width and stream channel width on ecological networks in main waterways and tributaries. Science of The Total Environment. 2021; 792 ():148457.

Chicago/Turabian Style

Muhammad Arif; Muhammad Tahir; Zheng Jie; Li Changxiao. 2021. "Impacts of riparian width and stream channel width on ecological networks in main waterways and tributaries." Science of The Total Environment 792, no. : 148457.

Research article
Published: 05 April 2021 in Environmental Science and Pollution Research
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Many rivers across the globe are regulated by dams, resulting in a strong alteration of the plant community composition of the drawdown zone. But, how these changes happen along the drawdown zone is less understood. In this study, a multivariate analysis was used to explore plant composition and similarity along the drawdown zone of the Three Gorges Dam Reservoir (TGDR), China. The dominant plant species, species richness, indicator species, and growth form were compared among the upstream, midstream, and downstream of the TGDR. Moreover, variation partitioning was used to determine the relative importance of environmental factors and spatial factors. Results showed that only a few species contributed the most to the community composition of the study area, and there was an extreme similarity in the plant community composition across the three different river segments. Furthermore, the results of the linear regression model demonstrated a steady declining trend in species richness along the drawdown zone, with the lowest species richness in the downstream segment. In addition, variation partitioning revealed 11% and 8% of the species composition change under environmental and spatial factors, respectively. Our results suggested that the dam impoundment led to the convergence of species composition along the drawdown zone of the TGDR, and environmental filtering and dispersal limitation played an imperative role in shaping species composition. The study highlighted the importance of restoration activities in overcoming the barriers of seed dispersal and seedling establishment in the degraded drawdown zone ecosystem of the TGDR.

ACS Style

Jie Zheng; Muhammad Arif; Songlin Zhang; Zhongxun Yuan; Limiao Zhang; Zhi Dong; Xue Tan; Wokadala Charles; Changxiao Li. The convergence of species composition along the drawdown zone of the Three Gorges Dam Reservoir, China: implications for restoration. Environmental Science and Pollution Research 2021, 28, 42609 -42621.

AMA Style

Jie Zheng, Muhammad Arif, Songlin Zhang, Zhongxun Yuan, Limiao Zhang, Zhi Dong, Xue Tan, Wokadala Charles, Changxiao Li. The convergence of species composition along the drawdown zone of the Three Gorges Dam Reservoir, China: implications for restoration. Environmental Science and Pollution Research. 2021; 28 (31):42609-42621.

Chicago/Turabian Style

Jie Zheng; Muhammad Arif; Songlin Zhang; Zhongxun Yuan; Limiao Zhang; Zhi Dong; Xue Tan; Wokadala Charles; Changxiao Li. 2021. "The convergence of species composition along the drawdown zone of the Three Gorges Dam Reservoir, China: implications for restoration." Environmental Science and Pollution Research 28, no. 31: 42609-42621.

Journal article
Published: 23 February 2021 in Science of The Total Environment
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Riparian ecosystem services along higher-order streams and connected tributaries may change over time as disturbances continuously increase, resulting in diverse deterioration of buffer zones. How habitat, plant cover, regeneration, erosion, and exotic parameters (riparian health conditions) change within huge dams and reservoirs worldwide is an unanswered question. We used multivariate statistical techniques to assess changes in riparian health parameters affected by disturbances identified in 304 transects within the Three Gorges Dam Reservoir, China, and associated tributaries. Kruskal–Wallis tests (p < 0.01) revealed high diversity in habitat, plant cover, regeneration, erosion, and overall stream condition. There was also notable variance relating to exotic and pressure parameters. The critical variables of riparian health indicators and stress factors identified by principal component analysis explained 58.40% and 74.6% (in the main waterway) and 53.23% and 71.0% (in the tributaries) of the total variance. Among riparian health indicators, one habitat parameter (riparian vegetation width) in the main waterway and one regeneration parameter (tree size classes) in tributaries contributed greatly, along with other specified parameters. Furthermore, stress factors such as farming systems, land-use types, and pollutant activity variables had the highest impact on these water bodies. In comparison, counting stress factors alone showed more deterioration in the main waterway with a range of (r = −0.527– 0.493), as determined using Pearson correlation (p < 0.05). Furthermore, after indexing, the parameters exhibited weaker coefficient values in tributaries, where exotic correlated negatively with other indexed values. These findings are relevant for managers of massive dam and reservoir ecosystems seeking to mitigate environmental and socioeconomic losses.

ACS Style

Muhammad Arif; Zheng Jie; Charles Wokadala; Zhang Songlin; Yuan Zhongxun; Chen Zhangting; Dong Zhi; He Xinrui; Li Changxiao. Assessing riparian zone changes under the influence of stress factors in higher-order streams and tributaries: Implications for the management of massive dams and reservoirs. Science of The Total Environment 2021, 776, 146011 .

AMA Style

Muhammad Arif, Zheng Jie, Charles Wokadala, Zhang Songlin, Yuan Zhongxun, Chen Zhangting, Dong Zhi, He Xinrui, Li Changxiao. Assessing riparian zone changes under the influence of stress factors in higher-order streams and tributaries: Implications for the management of massive dams and reservoirs. Science of The Total Environment. 2021; 776 ():146011.

Chicago/Turabian Style

Muhammad Arif; Zheng Jie; Charles Wokadala; Zhang Songlin; Yuan Zhongxun; Chen Zhangting; Dong Zhi; He Xinrui; Li Changxiao. 2021. "Assessing riparian zone changes under the influence of stress factors in higher-order streams and tributaries: Implications for the management of massive dams and reservoirs." Science of The Total Environment 776, no. : 146011.

Journal article
Published: 15 October 2020 in Scientific Reports
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The leaves of riparian plants are the main source of energy and nutrients in riparian ecosystems. In order to evaluate the nutrient release of reforested trees in a riparian zone, a field litterbag experiment involving three foliar types (the leaves of either coniferous and broadleaf trees as single-leaf treatment, or a mixture of coniferous and broadleaf leaves as a heterogenous-leaf treatment) and different submergence depths [no submergence (CK), shallow submergence (SS), and deep submergence (DS)] was conducted in situ in the Three Gorges Reservoir (TGR) for one year. The results showed that, when compared to the single-leaf treatment, the heterogenous-leaf treatment exhibited greater mass loss at both SS and DS, in contrast to a greater nitrogen release rate only at DS and a greater phosphorous release rate only at SS. Overall, submergence facilitated decomposition and nutrient release, although the decomposition rate was higher in SS than in DS. The results suggested that the decomposition and nutrient release of the three foliar types may increase the potential pollution risk to the TGR water environment. Thus, we propose that the leaves of the reforested riparian stands be harvested prior to submergence to preserve the water quality of the TGR.

ACS Style

Zhangting Chen; Chaoying Wang; Xuemei Chen; Zhongxun Yuan; Hong Song; Changxiao Li. Heterogeneous leaves of predominant trees species enhance decomposition and nutrient release in the riparian zone of the Three Gorges Reservoir. Scientific Reports 2020, 10, 1 -9.

AMA Style

Zhangting Chen, Chaoying Wang, Xuemei Chen, Zhongxun Yuan, Hong Song, Changxiao Li. Heterogeneous leaves of predominant trees species enhance decomposition and nutrient release in the riparian zone of the Three Gorges Reservoir. Scientific Reports. 2020; 10 (1):1-9.

Chicago/Turabian Style

Zhangting Chen; Chaoying Wang; Xuemei Chen; Zhongxun Yuan; Hong Song; Changxiao Li. 2020. "Heterogeneous leaves of predominant trees species enhance decomposition and nutrient release in the riparian zone of the Three Gorges Reservoir." Scientific Reports 10, no. 1: 1-9.

Regular article
Published: 16 March 2020 in Plant and Soil
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This study aimed to examine the effects of NaCl on Cd tolerance of two halophytes with contrasting salt-tolerance ability: the euhalophyte Suaeda glauca and the recretohalophyte Limonium aureum. Plant growth, photosynthesis and physiological responses of two halophytes were measured in a pot experiment treated with 0, 3 and 6 mg kg−1 Cd in combination with 0 and 0.3% NaCl. Both halophytes exhibited fair-level (moderate level) Cd tolerant ability. NaCl mitigated Cd-induced toxicity on the growth and photosynthesis of S. glauca, particularly under low Cd level, while a negative effect of NaCl was observed in L. aureum. Moreover, activities of superoxide dismutase (SOD), peroxidase (POD), catalase (CAT) and ascorbate peroxidase (APX) in leaves of S. glauca were boosted by Cd and/or salinity treatment. Although similar responses were observed, the overall increase of enzymatic activities in L. aureum was lower than in S. glauca. The soluble protein content in two species showed an opposite trend among treatments, whereas the proline accumulation in L. aureum was exceptionally higher than that in S. glauca under saline conditions. The nutrient concentrations of these two halophytes were only slightly affected by Cd excess, and NaCl significantly enhanced their Na accumulation, regardless of the plant’s organ and Cd level. In addition, Cd absorption and translocation were greatly enhanced by NaCl in the two halophytes. Salt-induced alleviation of Cd toxicity in S. glauca might be mainly attributed to salt-triggered secondary metabolic strategy, which deffers from the energy-consuming adaptive strategy employed by L. aureum.

ACS Style

Songlin Zhang; Xilu Ni; Muhammad Arif; Jie Zheng; Annastacia Stubbs; Changxiao Li. NaCl improved Cd tolerance of the euhalophyte Suaeda glauca but not the recretohalophyte Limonium aureum. Plant and Soil 2020, 449, 303 -318.

AMA Style

Songlin Zhang, Xilu Ni, Muhammad Arif, Jie Zheng, Annastacia Stubbs, Changxiao Li. NaCl improved Cd tolerance of the euhalophyte Suaeda glauca but not the recretohalophyte Limonium aureum. Plant and Soil. 2020; 449 (1-2):303-318.

Chicago/Turabian Style

Songlin Zhang; Xilu Ni; Muhammad Arif; Jie Zheng; Annastacia Stubbs; Changxiao Li. 2020. "NaCl improved Cd tolerance of the euhalophyte Suaeda glauca but not the recretohalophyte Limonium aureum." Plant and Soil 449, no. 1-2: 303-318.

Journal article
Published: 02 March 2020 in Sustainability
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Intense industrial activities could result in massive accumulations of trace elements in the soil and risk the terrestrial ecosystems and human health. A total of 119 topsoil samples from a typical industrial area, Huinong District, Ningxia, Northwest China, were collected, and the contents of six trace elements (As, Cd, Cr, Cu, Pb, and Zn) were determined. The results indicated that the mean concentrations of Cr, Cu, Pb, and Zn were lower than the national standard values of class II, while As and Cd were 2.77 and 3.92 times the corresponding threshold values. Multivariate analyses revealed six metals can be categorized into three principal components (PC). PC1 was As, Cd, and Pb, which originated from anthropogenic inputs. PC2 consisted of Cr and Cu, which originated from the natural geological background. PC3 only included Zn and was mainly due to agricultural impacts. The spatial distribution of six metals greatly varied from local anthropic inputs. For As and Cd, the most heavily polluted area was located in the north and southwest parts of the study area, whereas most Zn was enriched in the southern part, which was mainly agricultural land. The topsoil in this area displayed a moderate environmental risk with the metal pollution order of Cd > As > Zn ≈ Cr ≈ Pb ≈ Cu. Moreover, the contents of trace elements in the industrial land and water were relatively higher than those in other land-use types, indicating a considerable risk of metal migration and accumulation to rivers and the groundwater. It is suggested that effective remediation measures for Cd and As, in particular, should be properly employed for the sustainable development of the soil and groundwater, while reducing the risk of elements to the local residents in Huinong District.

ACS Style

Songlin Zhang; Yuan Liu; Yujing Yang; Xilu Ni; Muhammad Arif; Wokadala Charles; Changxiao Li. Trace Elements in Soils of a Typical Industrial District in Ningxia, Northwest China: Pollution, Source, and Risk Evaluation. Sustainability 2020, 12, 1868 .

AMA Style

Songlin Zhang, Yuan Liu, Yujing Yang, Xilu Ni, Muhammad Arif, Wokadala Charles, Changxiao Li. Trace Elements in Soils of a Typical Industrial District in Ningxia, Northwest China: Pollution, Source, and Risk Evaluation. Sustainability. 2020; 12 (5):1868.

Chicago/Turabian Style

Songlin Zhang; Yuan Liu; Yujing Yang; Xilu Ni; Muhammad Arif; Wokadala Charles; Changxiao Li. 2020. "Trace Elements in Soils of a Typical Industrial District in Ningxia, Northwest China: Pollution, Source, and Risk Evaluation." Sustainability 12, no. 5: 1868.

Journal article
Published: 13 February 2020 in Forests
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The possible negative impacts of flow regulation on riparian zone conditions can be observed due to the disruption of the natural flow regime in reservoirs. In spite of considerable literature on the qualitative effects of external disturbances on riparian health indicators (RHIs), quantitative evaluations of such changes induced by pressure are rare in the literature. Our study evaluated the effects of pressure indicators on the RHIs, and the responses of RHIs relevant to the riparian zones of the Three Gorges Dam Reservoir (TGDR), China, by using the field-based approach. This paper is a component of a large project—rapid appraisal of riparian condition for the TGDR, China. The analysis has compared pressures (13 indicators) and RHIs (27 indicators) determined from the transects (259) identified throughout the TGDR (within 15 counties) by categorizing into upstream, midstream, and downstream. By using basic statistical techniques (Kruskal-Wallis tests and Pearson’s correlation), pressure indicators were found to significantly differently influence RHIs for the categorized three sections of the riparian zones of the TGDR. The correlation analysis confirmed that the pressure indicators correlated (range of r = −0.496–0.971) with the RHIs (enlisted as habitat, plant cover, regeneration, erosion, and exotic parameters). Moreover, pressure indicators were found to have a highly significant influence on erosion and habitat parameters, but moderate effects on plant cover, exotic and regeneration parameters. In addition, the highest relative effect of the pressure indicators was detected in the upstream transects, whereas the lowest was in the downstream transects. Agglomerative Hierarchical Cluster analysis also confirmed the substantial dissimilarity in the upstream transects, whereas significant similarities were identified between midstream and downstream transects. These results may be particularly important in the planning stages, to help administrators and planners form better priorities and treatments for reach-scale conservation and restoration of wide-ranging riparian zones.

ACS Style

Muhammad Arif; Songlin Zhang; Zheng Jie; Wokadala Charles; Pinky Sanelisiwe Mzondi; Changxiao Li. Evaluating the Effects of Pressure Indicators on Riparian Zone Health Conditions in the Three Gorges Dam Reservoir, China. Forests 2020, 11, 214 .

AMA Style

Muhammad Arif, Songlin Zhang, Zheng Jie, Wokadala Charles, Pinky Sanelisiwe Mzondi, Changxiao Li. Evaluating the Effects of Pressure Indicators on Riparian Zone Health Conditions in the Three Gorges Dam Reservoir, China. Forests. 2020; 11 (2):214.

Chicago/Turabian Style

Muhammad Arif; Songlin Zhang; Zheng Jie; Wokadala Charles; Pinky Sanelisiwe Mzondi; Changxiao Li. 2020. "Evaluating the Effects of Pressure Indicators on Riparian Zone Health Conditions in the Three Gorges Dam Reservoir, China." Forests 11, no. 2: 214.

Journal article
Published: 23 January 2020 in Ecotoxicology and Environmental Safety
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The potential for the phytoremediation of halophytes has been widely recognized. However, the effects of salt on Cd accumulation characteristics in different halophytic species, which may also be related to their salt tolerance, are still unclear. This study investigated the effects of salinity on Cd accumulation and distribution in two distinct halophytes, Suaeda glauca (euhalophyte) and Limonium aureum (recretohalophyte). Seedlings of the two species were treated with 0, 3, and 6 mg kg−1 soil Cd in combination with or without 0.3% NaCl in a pot experiment. The amount of Cd within the rhizosphere and plant tissues, plant biomass, and the subcellular distribution and chemical forms of Cd were examined. Results showed that the addition of NaCl significantly increased Cd bioavailability at high Cd levels due to the rhizosphere acidification effect. Meanwhile, salinity differently impacted plant biomass allocation, and enhanced Cd uptake and translocation in both studied halophytes. Excess Cd was excreted from the leaf surface, possibly by salt glands of L. aureum, with the salinity facilitating this process. Majority of the Cd was found within the cell walls and vacuolar compartments of two species. However, S. glauca plants had higher proportions of inactive Cd (extracted by 2% HAc and 0.6 M HCl) and lower proportions of active Cd (extracted by 80% ethanol and water), as opposed to L. aureum, which would better inform S. glauca's higher Cd accumulation. Based on these results, S. glauca seems more applicable for phytomanagement of Cd-contaminated saline soils due to its higher capacity for Cd enrichment and tolerance amplified by NaCl.

ACS Style

Songlin Zhang; Xilu Ni; Muhammad Arif; Zhongxun Yuan; Lijuan Li; Changxiao Li. Salinity influences Cd accumulation and distribution characteristics in two contrasting halophytes, Suaeda glauca and Limonium aureum. Ecotoxicology and Environmental Safety 2020, 191, 110230 .

AMA Style

Songlin Zhang, Xilu Ni, Muhammad Arif, Zhongxun Yuan, Lijuan Li, Changxiao Li. Salinity influences Cd accumulation and distribution characteristics in two contrasting halophytes, Suaeda glauca and Limonium aureum. Ecotoxicology and Environmental Safety. 2020; 191 ():110230.

Chicago/Turabian Style

Songlin Zhang; Xilu Ni; Muhammad Arif; Zhongxun Yuan; Lijuan Li; Changxiao Li. 2020. "Salinity influences Cd accumulation and distribution characteristics in two contrasting halophytes, Suaeda glauca and Limonium aureum." Ecotoxicology and Environmental Safety 191, no. : 110230.

Original research article
Published: 09 January 2019 in Frontiers in Plant Science
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Previous studies have shown that waterlogging/ hypoxic conditions induce aerenchyma formation to facilitate gas exchange. Ethylene (ET) and reactive oxygen species (ROS), as regulatory signals, might also be involved in these adaptive responses. However, the interrelationships between these signals have seldom been reported. Herein, we showed that programmed cell death (PCD) was involved in aerenchyma formation in the stem of Helianthus annuus. Lysigenous aerenchyma formation in the stem was induced through waterlogging (WA), ethylene and ROS. Pre-treatment with the NADPH oxidase inhibitor diphenyleneiodonium (DPI) partially suppressed aerenchyma formation in the seedlings after treatment with WA, ET and 3-amino-1, 2, 4-triazole (AT, catalase inhibitor). In addition, pre-treatment with the ethylene perception inhibitor 1-methylcyclopropene (1-MCP) partially suppressed aerenchyma formation induced through WA and ET in the seedlings, but barely inhibited aerenchyma formation induced through ROS. These results revealed that ethylene-mediated ROS signaling plays a role in aerenchyma formation, and there is a causal and interdependent relationship during WA, ET and ROS in PCD, which regulates signal networks in the stem of H. annuus.

ACS Style

Xi-Lu Ni; Meng-Yuan Gui; Ling-Ling Tan; Qiang Zhu; Wen-Zhe Liu; Chang-Xiao Li. Programmed Cell Death and Aerenchyma Formation in Water-Logged Sunflower Stems and Its Promotion by Ethylene and ROS. Frontiers in Plant Science 2019, 9, 1928 .

AMA Style

Xi-Lu Ni, Meng-Yuan Gui, Ling-Ling Tan, Qiang Zhu, Wen-Zhe Liu, Chang-Xiao Li. Programmed Cell Death and Aerenchyma Formation in Water-Logged Sunflower Stems and Its Promotion by Ethylene and ROS. Frontiers in Plant Science. 2019; 9 ():1928.

Chicago/Turabian Style

Xi-Lu Ni; Meng-Yuan Gui; Ling-Ling Tan; Qiang Zhu; Wen-Zhe Liu; Chang-Xiao Li. 2019. "Programmed Cell Death and Aerenchyma Formation in Water-Logged Sunflower Stems and Its Promotion by Ethylene and ROS." Frontiers in Plant Science 9, no. : 1928.

Journal article
Published: 31 July 2018 in Sustainability
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Various industrial activities contribute heavy metals to terrestrial ecosystems. In order to evaluate the soil quality of industrial areas and to identify the potential phytoremediator from the native plant species, we collected 45 surface soil samples and 21 plant species in a typical industrial area of northwestern China. The results showed that the average values of the Cd, Cr, As, Pb, Cu, and Zn in the soils were 36.91, 1.67, 7.20, 1.38, 1.27, and 6.66 times, respectively, compared with the corresponding background values. The average single factor pollution index for heavy metals decreased in the order of Cd > As > Zn > Cr > Cu > Pb. The study area was seriously polluted by Cd and As, slightly polluted by Zn, and had relatively little contamination by Cr, Pb, and Cu. In terms of the average Nemerow synthetic pollution index in every sampling site, 97.78% of the samples were seriously polluted and 2.22% of the samples were moderately polluted, which indicated that almost all of the samples in the industrial area were seriously polluted. The results of the biomass, heavy metal concentrations, bioconcentration factors (BCF), and translocation factors (TF) for the native plants showed that Achnatherum splendens for metal Cr presented a phytostabilization potential, Artemisia scoparia and Echinochloa crusgalli for metal Cu and Halogeton arachnoideus for metal Zn presented a phytoextraction potential, and all of the studied plants were limited as phytoremediators for Cd or Pb contaminated soil.

ACS Style

Yuan Liu; Yujing Yang; Changxiao Li; Xilu Ni; Wenchao Ma; Hong Wei. Assessing Soil Metal Levels in an Industrial Environment of Northwestern China and the Phytoremediation Potential of Its Native Plants. Sustainability 2018, 10, 2686 .

AMA Style

Yuan Liu, Yujing Yang, Changxiao Li, Xilu Ni, Wenchao Ma, Hong Wei. Assessing Soil Metal Levels in an Industrial Environment of Northwestern China and the Phytoremediation Potential of Its Native Plants. Sustainability. 2018; 10 (8):2686.

Chicago/Turabian Style

Yuan Liu; Yujing Yang; Changxiao Li; Xilu Ni; Wenchao Ma; Hong Wei. 2018. "Assessing Soil Metal Levels in an Industrial Environment of Northwestern China and the Phytoremediation Potential of Its Native Plants." Sustainability 10, no. 8: 2686.

Research article
Published: 06 June 2018 in Environmental Science and Pollution Research
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As one of the most active components in soil, bacteria can affect soil physicochemical properties, its biological characteristics, and even its quality and health. We characterized dynamics of the soil bacterial diversity in planted (with Taxodium distichum) and unplanted soil in the riparian zone of the Three Gorges Dam Reservoir (TGDR), in southwestern China, in order to accurately quantify the changes in long-term soil bacterial community structure after revegetation. Measurements were taken annually in situ in the TGDR over the course of 5 years, from 2012 to 2016. Soil chemical properties and bacterial diversity were analyzed in both the planted and unplanted soil. After revegetation, the soil chemical properties in planted soil were significantly different than in unplanted soil. The effects of treatment, time, and the interaction of both time and treatment had significant impacts on most diversity indices. Specifically, the bacterial community diversity indices in planted soil were significantly higher and more stable than that in unplanted soil. The correlation analyses indicated that the diversity indices correlated with the pH value, organic matter, and soil available nutrients. After revegetation in the riparian zone of the TGDR, the soil quality and health is closely related to the observed bacterial diversity, and a higher bacterial diversity avails the maintenance of soil functionality. Thus, more reforestation should be carried out in the riparian zone of the TGDR, so as to effectively mitigate the negative ecological impacts of the dam. Vegetating the reservoir banks with Taxodium distichum proved successful, but planting mixed stands of native tree species could promote even higher riparian soil biodiversity and improved levels of ecosystem functioning within the TGDR.

ACS Style

Qingshui Ren; Changxiao Li; Wenhang Yang; Hong Song; Peng Ma; Chaoying Wang; Rebecca L. Schneider; Stephen J. Morreale. Revegetation of the riparian zone of the Three Gorges Dam Reservoir leads to increased soil bacterial diversity. Environmental Science and Pollution Research 2018, 25, 23748 -23763.

AMA Style

Qingshui Ren, Changxiao Li, Wenhang Yang, Hong Song, Peng Ma, Chaoying Wang, Rebecca L. Schneider, Stephen J. Morreale. Revegetation of the riparian zone of the Three Gorges Dam Reservoir leads to increased soil bacterial diversity. Environmental Science and Pollution Research. 2018; 25 (24):23748-23763.

Chicago/Turabian Style

Qingshui Ren; Changxiao Li; Wenhang Yang; Hong Song; Peng Ma; Chaoying Wang; Rebecca L. Schneider; Stephen J. Morreale. 2018. "Revegetation of the riparian zone of the Three Gorges Dam Reservoir leads to increased soil bacterial diversity." Environmental Science and Pollution Research 25, no. 24: 23748-23763.

Journal article
Published: 04 May 2018 in Forests
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Soil enzymes and microbes are central to the decomposition of plant and microbial detritus, and play important roles in carbon, nitrogen, and phosphorus biogeochemistry cycling at the ecosystem level. In the present study, we characterized the soil enzyme activity and microbial biomass in revegetated (with Taxodium distichum (L.) Rich. and Cynodon dactylon (L.) Pers.) versus unplanted soil in the riparian zone of the Three Gorges Dam Reservoir (TGDR), in order to quantify the effect of revegetation on the edaphic microenvironment after water flooding in situ. After revegetation, the soil physical and chemical properties in revegetated soil showed significant differences to those in unplanted soil. The microbial biomass carbon and phosphorus in soils of T. distichum were significantly higher than those in C. dactylon and unplanted soils, respectively. The microbial biomass nitrogen in revegetated T. distichum and C. dactylon soils was significantly increased by 273% and 203%, respectively. The enzyme activities of T. distichum and C. dactylon soils displayed no significant difference between each other, but exhibited a great increase compared to those of the unplanted soil. Elements ratio (except C/N (S)) did not vary significantly between T. distichum and C. dactylon soils; meanwhile, a strong community-level elemental homeostasis in the revegetated soils was found. The correlation analyses demonstrated that only microbial biomass carbon and phosphorus had a significantly positive relationship with soil enzyme activities. After revegetation, both soil enzyme activities and microbial biomasses were relatively stable in the T. distichum and C. dactylon soils, with the wooded soil being more superior. The higher enzyme activities and microbial biomasses demonstrate the C, N, and P cycling and the maintenance of soil quality in the riparian zone of the TGDR.

ACS Style

Qingshui Ren; Hong Song; Zhongxun Yuan; Xilu Ni; Changxiao Li. Changes in Soil Enzyme Activities and Microbial Biomass after Revegetation in the Three Gorges Reservoir, China. Forests 2018, 9, 249 .

AMA Style

Qingshui Ren, Hong Song, Zhongxun Yuan, Xilu Ni, Changxiao Li. Changes in Soil Enzyme Activities and Microbial Biomass after Revegetation in the Three Gorges Reservoir, China. Forests. 2018; 9 (5):249.

Chicago/Turabian Style

Qingshui Ren; Hong Song; Zhongxun Yuan; Xilu Ni; Changxiao Li. 2018. "Changes in Soil Enzyme Activities and Microbial Biomass after Revegetation in the Three Gorges Reservoir, China." Forests 9, no. 5: 249.

Research article
Published: 01 January 2018 in Functional Plant Biology
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Trapa plants (Trapaceae) have an inflated leaf petiole called a spongy airbag. The aims of this study were to assess the involvement of programmed cell death (PCD) in the process of inflated leaf petiole morphogenesis. In this paper, light and transmission electron microscopy (TEM) were used to investigate cytological events and the development of inflated leaf petiole. During this process, the inflated leaf petiole of Trapa pseudoincisa L. undergoes a developmental process, changing from solid to hollow phase. Debris from the degraded cells was seldom observed in the transverse sections of leaf petioles, but some degraded cells with an abnormal morphology were observed in longitudinal sections. Cytoplasmic changes, such as disrupted vacuoles, degraded plastids, and the emergence of secondary vacuoles were observed during leaf petiole morphogenesis. In addition, gel electrophoresis and TUNEL assays were used to evaluate DNA cleavage during petiole morphogenesis. DNA internucleosomal cleavage and TUNEL-positive nuclei indicate that the typical PCD features of DNA cleavage occurred early in the process. These results revealed that PCD plays a critical role in inflated leaf petiole morphogenesis. Additionally, a trans-disciplinary systems approach is required that recognises the necessity for integration of cytological and molecular characteristics for identification of aerenchyma type.

ACS Style

Xi-Lu Ni; Ling-Ling Tan; Ya-Fu Zhou; Wen-Zhe Liu; Chang-Xiao Li. The involvement of programmed cell death in inflated leaf petiole morphogenesis in Trapa pseudoincisa. Functional Plant Biology 2018, 45, 412 -427.

AMA Style

Xi-Lu Ni, Ling-Ling Tan, Ya-Fu Zhou, Wen-Zhe Liu, Chang-Xiao Li. The involvement of programmed cell death in inflated leaf petiole morphogenesis in Trapa pseudoincisa. Functional Plant Biology. 2018; 45 (4):412-427.

Chicago/Turabian Style

Xi-Lu Ni; Ling-Ling Tan; Ya-Fu Zhou; Wen-Zhe Liu; Chang-Xiao Li. 2018. "The involvement of programmed cell death in inflated leaf petiole morphogenesis in Trapa pseudoincisa." Functional Plant Biology 45, no. 4: 412-427.

Journal article
Published: 04 August 2017 in Forests
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Submergence-tolerant trees are essential for vegetation restoration of the hydro-fluctuation zone of the Three Gorges Dam Reservoir (TGDR) area. Thus, it is of great significance to select the submergence-tolerant plant species by conducting in situ studies. To restore degraded riparian vegetation under the circumstances of dynamic impoundment of the TGDR, Salix matsudana Koidz., a flooding-tolerant native tree species, was introduced to conduct an in situ practical study to test its performance in re-vegetating and restoring the hydro-fluctuation zone of the TGDR. Effects of periodic moderate submergence (MS) and deep submergence (DS) on photosynthesis and growth of Salix matsudana Koidz. were investigated after three water cycles compared to a control (i.e., shallow submergence, abbreviated as SS) in order to specifically assess its application prospects in vegetation restoration under such extreme environment. Results showed that net photosynthetic rate (Pn), intrinsic water use efficiency (WUEi) and limiting value of stomata (Ls) of S. matsudana were significantly reduced in DS. However, pigment content had no significant change in all submergence treatments. Diameter at breast height (DBH) and tree height of S. matsudana were significantly decreased in both MS and DS when compared to that of SS, respectively. In contrast, the primary branch number of S. matsudana was significantly increased as submergence increased. In addition, relative diameter and height growth rates of S. matsudana were also reduced under submergence. Considering the sustained growth of this species, S. matsudana saplings are tolerant to long-term periodic submergence and can be applied to the vegetative restoration of the hydro-fluctuation zone of the TGDR region.

ACS Style

Chaoying Wang; Yingzan Xie; Yanyan He; Xiaoxue Li; Wenhang Yang; Changxiao Li. Growth and Physiological Adaptation of Salix matsudana Koidz. to Periodic Submergence in the Hydro-Fluctuation Zone of the Three Gorges Dam Reservoir of China. Forests 2017, 8, 283 .

AMA Style

Chaoying Wang, Yingzan Xie, Yanyan He, Xiaoxue Li, Wenhang Yang, Changxiao Li. Growth and Physiological Adaptation of Salix matsudana Koidz. to Periodic Submergence in the Hydro-Fluctuation Zone of the Three Gorges Dam Reservoir of China. Forests. 2017; 8 (8):283.

Chicago/Turabian Style

Chaoying Wang; Yingzan Xie; Yanyan He; Xiaoxue Li; Wenhang Yang; Changxiao Li. 2017. "Growth and Physiological Adaptation of Salix matsudana Koidz. to Periodic Submergence in the Hydro-Fluctuation Zone of the Three Gorges Dam Reservoir of China." Forests 8, no. 8: 283.

Journal article
Published: 01 March 2016 in Photosynthetica
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To uncover the adaptation capacities of two flooding-tolerant plant species, Pterocarya stenoptera (a native species) and Pinus elliottii (an exotic species from southeastern USA), to alternating submergence and drought, we investigated their physiological and growth responses to water stress. Water treatments, including control, continuous flooding (CF), and periodic flooding and drought (PF), were applied to the seedlings to simulate water level fluctuation in the hydrofluctuation zone of the Three Gorges Reservoir region. Results showed that net photosynthetic rate (P N), stomatal conductance, and intrinsic water-use efficiency of both plant species seedlings were negatively affected under CF and PF compared to the corresponding controls. The P N of both species in PF was comparable to that in CF. At the end of the experiment, the ratio of intercellular to ambient CO2 concentration was not statistically different among water treatments, while that of P. elliottii was significantly higher than that of P. stenoptera. Although P. stenoptera formed lenticels under flooding conditions, P. elliottii seedlings allocated more mass to leaf and increased the relative growth rate of height to enhance the photosynthetic efficiency. These results illustrated that P. stenoptera and P. elliottii seedlings developed different adaptive strategies to respond to continuous flooding and periodic flooding and drought events. Therefore, both P. stenoptera and P. elliottii are promising candidates for the vegetation reconstruction of the riparian zones in the Three Gorges Reservoir Region.

ACS Style

Yujing Yang; C. Li. Photosynthesis and growth adaptation of Pterocarya stenoptera and Pinus elliottii seedlings to submergence and drought. Photosynthetica 2016, 54, 120 -129.

AMA Style

Yujing Yang, C. Li. Photosynthesis and growth adaptation of Pterocarya stenoptera and Pinus elliottii seedlings to submergence and drought. Photosynthetica. 2016; 54 (1):120-129.

Chicago/Turabian Style

Yujing Yang; C. Li. 2016. "Photosynthesis and growth adaptation of Pterocarya stenoptera and Pinus elliottii seedlings to submergence and drought." Photosynthetica 54, no. 1: 120-129.

Journal article
Published: 01 September 2014 in Ying yong sheng tai xue bao = The journal of applied ecology
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Shuai Li; Hong Wei; Xi-Lu Ni; Yan-Wen Gu; Chang-Xiao Li. [Evaluation of urban human settlement quality in Ningxia based on AHP and the entropy method]. Ying yong sheng tai xue bao = The journal of applied ecology 2014, 25, 1 .

AMA Style

Shuai Li, Hong Wei, Xi-Lu Ni, Yan-Wen Gu, Chang-Xiao Li. [Evaluation of urban human settlement quality in Ningxia based on AHP and the entropy method]. Ying yong sheng tai xue bao = The journal of applied ecology. 2014; 25 (9):1.

Chicago/Turabian Style

Shuai Li; Hong Wei; Xi-Lu Ni; Yan-Wen Gu; Chang-Xiao Li. 2014. "[Evaluation of urban human settlement quality in Ningxia based on AHP and the entropy method]." Ying yong sheng tai xue bao = The journal of applied ecology 25, no. 9: 1.

Journal article
Published: 13 April 2010 in Wetlands Ecology and Management
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Chinese wingnut (Pterocarya stenoptera) is the dominant native tree species in the riparian zone of the Three Gorges Reservoir region of China. Water treatments of continuous wet soil (WS) and submergence of the soil (SS) were imposed on 4-month-old Chinese wingnut seedlings for 12 months. The effects of water treatment on photosynthesis and growth were investigated after 2 and 12 months compared to a control (C). Submergence of the soil resulted in significant reductions in net photosynthetic rate (Pn), and stomatal conductance (g s) as compared to C. However, stomatal conductance in wet soil treatment was maintained comparable to that of C, although net photosynthetic rate was reduced significantly. Overall, intrinsic water use efficiency (WUE i ) under submergence of the soil was not significantly different from that of C, but significantly higher than that of the wet soil treatment. The intrinsic water use efficiency in the wet soil treatment was also significantly decreased compared to that in the control. During the entire experiment, growth and biomass of Chinese wingnut seedlings were significantly reduced due to adverse impacts of the submergence of the soil or wet soil treatment. These results suggest that Chinese wingnut seedlings less than 1-year-old would probably need intensive soil water management for sound growth. In the Three Gorges Reservoir region, adequate draining activities should be considered for this species’ regeneration.

ACS Style

Chang-Xiao Li; Hong Wei; Yang-Hui Geng; Rebecca Schneider. Effects of submergence on photosynthesis and growth of Pterocarya stenoptera (Chinese wingnut) seedlings in the recently-created Three Gorges Reservoir region of China. Wetlands Ecology and Management 2010, 18, 485 -494.

AMA Style

Chang-Xiao Li, Hong Wei, Yang-Hui Geng, Rebecca Schneider. Effects of submergence on photosynthesis and growth of Pterocarya stenoptera (Chinese wingnut) seedlings in the recently-created Three Gorges Reservoir region of China. Wetlands Ecology and Management. 2010; 18 (4):485-494.

Chicago/Turabian Style

Chang-Xiao Li; Hong Wei; Yang-Hui Geng; Rebecca Schneider. 2010. "Effects of submergence on photosynthesis and growth of Pterocarya stenoptera (Chinese wingnut) seedlings in the recently-created Three Gorges Reservoir region of China." Wetlands Ecology and Management 18, no. 4: 485-494.

Journal article
Published: 09 October 2009 in Plant and Soil
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Responses of baldcypress (Taxodium distichum) and pondcypress (Taxodium ascendens) seedlings in leaf gas exchange and root metabolism to a wide range of hydrological regimes were studied. Four water treatments included control (C), mild drought (MD), wet soil (WS) and flooding (FL). Both species showed no significant change in net photosynthetic rate (Pn) in response to flooding in contrast to significant reduction in Pn under mild drought conditions. In baldcypress, Pn was also maintained at control level compared to significant increase of Pn in pondcypress when subjected to the wet soil treatment. In flooding, both species showed significant increase in contents of malate and shikimate in their lateral roots and further in total roots, as compared to control. However, different adaptation to flooding was demonstrated in their taproots in contents of malate and shikimate. Furthermore, baldcypress seedlings showed significant reductions in lateral and total root biomass, in contrast with no significant change in that of pondcypress seedlings in response to flooding. In wet soil, no significant effects were revealed in contents of malate and shikimate in roots (including different root portions) of baldcypress seedlings in contrast to significant increase of their contents in lateral roots of pondcypress seedlings. No significant effects on root biomass were detected in either baldcypress or pondcypress seedlings in response to wet soil. When subjected to mild drought, baldcypress seedlings displayed no significant change in contents of malate and shikimate in roots, whereas pondcypress seedlings exhibited significant reduction in content of shikimate in lateral roots and total roots. In addition, root biomass of baldcypress seedlings showed no significant change, while lateral and total root biomass of pondcypress seedlings demonstrated significant increase when mild drought was imposed. These findings indicate that baldcypress and pondcypress appear to be promising candidates for reforestation in the Three Gorges Reservoir region due to their characteristics of water-tolerance and mild drought endurance. However, pondcypress is more resilient than baldcypress to the continuum of water availability conditions expected in the Three Gorges Reservoir region.

ACS Style

Changxiao Li; Zhangcheng Zhong; Yanghui Geng; Rebecca Schneider. Comparative studies on physiological and biochemical adaptation of Taxodium distichum and Taxodium ascendens seedlings to different soil water regimes. Plant and Soil 2009, 329, 481 -494.

AMA Style

Changxiao Li, Zhangcheng Zhong, Yanghui Geng, Rebecca Schneider. Comparative studies on physiological and biochemical adaptation of Taxodium distichum and Taxodium ascendens seedlings to different soil water regimes. Plant and Soil. 2009; 329 (1-2):481-494.

Chicago/Turabian Style

Changxiao Li; Zhangcheng Zhong; Yanghui Geng; Rebecca Schneider. 2009. "Comparative studies on physiological and biochemical adaptation of Taxodium distichum and Taxodium ascendens seedlings to different soil water regimes." Plant and Soil 329, no. 1-2: 481-494.