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A Corrigendum on Role of Hydraulic Signal and ABA in Decrease of Leaf Stomatal and Mesophyll Conductance in Soil Drought-Stressed Tomato by Li, S., Liu, J., Liu, H., Qiu, R., Gao, Y., and Duan, A. (2021) Front. Plant Sci. 12:653186. doi: 10.3389/fpls.2021.653186 In the original article, there was an error in Figure 1 as published. The value of Ψsoil at 33 DAT should be −1.44 MPa. The corrected Figure 1 appears here. Figure 1. Dynamics of RSWC and Ψsoil in the well-watered (CK) and drought-stressed tomato seedlings during 27–33 DAT. Mean values and SD were presented (n = 6). ns indicated no significant difference and ** indicated significant difference at P < 0.01 level between drought and well-watered treatment. The associated text in the Results section Dynamic of Soil Water Status has also been updated to reflect the correction to Figure 1, as described below. The originally published sentence “By withholding irrigation from 27 to 33 DAT during the progressive drying process, RSWC in the drought treatment decreased gradually from 82.90 to 37.27% and Ψsoil decreased by 1.12 MPa correspondingly.” has been corrected to read “By withholding irrigation from 27 to 33 DAT during the progressive drying process, RSWC in the drought treatment decreased gradually from 82.90 to 37.27% and Ψsoil decreased by 1.04 MPa correspondingly.” In the original article, there was an error in Figure 3 as published. The value of Ψsoil at 33 DAT should be −1.44 MPa. The corrected Figure 3 appears here. Figure 3. Effect of soil water potential (Ψsoil) on the relative contribution of the photosynthesis capacity limiting factors: limitations of An resulting from gs (ls), gm (lm), and biochemical photosynthetic capacity (lb) after transplanting. Data were means. Different letters indicated statistically significant difference between well-watered (CK) and drought plants at P < 0.05 level. The associated text in the Results section Quantitative Analysis of Photosynthetic Limitation in Response to Soil Drying has also been updated to reflect the correction to Figure 3, as described below. The originally published sentence “Thirdly, with Ψsoil decreasing to −1.54 MPa, lm contributed to 41.99% reduction in photosynthesis, followed by ls (36.93%) and lb (21.08%), showing that gm was the most important limiting factor to photosynthetic capacity under the severe drought condition.” has been corrected to read “Thirdly, with Ψsoil decreasing to −1.44 MPa, lm contributed to 41.99% reduction in photosynthesis, followed by ls (36.93%) and lb (21.08%), showing that gm was the most important limiting factor to photosynthetic capacity under the severe drought condition.” In the original article, there were errors in Table 2 as published. Owing to a miscalculation, the values of the parameters were incorrect. The corrected Table 2 appears here. Table 2. Sensitivity analyses of the effects of ±20% error of light mitochondrial respiration (Rd), chloroplast CO2 compensation point (Γ*), electron transport rate (Jf), and intercellular CO2 concentration (Ci) on calculation of gm in well-watered and severe drought tomato at Ψsoil = −1.44 MPa as compared with the original value of gm. The associated text has also been updated to reflect to reflect the correction to Table 2, as described below. In the Results section Sensitivity Analyses of Parameters in the Estimation gm, the originally published sentence “20% variation of Rd, Γ* did not affect gm significantly (Table 2).” has been corrected to read “10% variation of Rd and Jf did not affect gm significantly, whereas Γ* has a significantly effect on gm in well-watered plants (Table 2).” In the Results section Sensitivity Analyses of Parameters in the Estimation gm, the originally published sentence “20% underestimation of Ci resulted in an overestimation of gm, while gm was unaffected by overestimation of Ci in both the well-watered and drought treatments.” has been corrected to read “Variation of Ci resulted in an overestimation of gm in well-watered plants, whereas gm in drought treatment was unaffected by overestimation of Ci.” In the Discussion section Response of gm to Ψleaf and ABA Under Soil Drought, the originally published sentence “However, the sensitivity analyses showed that an overestimation of Ci did not induce gm decline neither in the well-watered nor drought-stressed plants (Table 2).” has been corrected to read “However, the sensitivity analyses showed that an overestimation of Ci did not induce gm decline in drought-stressed plants (Table 2).” In the original article, there were errors (incorrect P-values) in the following sentence from the Results section Ψleaf and ABA in the Regulation of gs, gm, gt, and An: “In summary, ABA was negatively related to gm (r = −0.64, P < 0.001) and gs (r = −0.55, P < 0.001) (Table 1).” The sentence should have read “In summary, ABA was negatively related to gm (r = −0.64, P < 0.01) and gs (r = −0.55, P < 0.01) (Table 1).” The authors apologize for these errors and state that they do not change the scientific conclusions of the article in any way. The original article has been updated. All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article, or claim that may be made by its manufacturer, is not guaranteed or endorsed by the publisher. Keywords: drought, leaf water potential, abscisic acid, stomatal conductance, mesophyll conductance, intrinsic water use efficiency Citation: Li S, Liu J, Liu H, Qiu R, Gao Y and Duan A (2021) Corrigendum: Role of Hydraulic Signal and ABA in...
Shuang Li; Junming Liu; Hao Liu; Rangjian Qiu; Yang Gao; Aiwang Duan. Corrigendum: Role of Hydraulic Signal and ABA in Decrease of Leaf Stomatal and Mesophyll Conductance in Soil Drought-Stressed Tomato. Frontiers in Plant Science 2021, 12, 1 .
AMA StyleShuang Li, Junming Liu, Hao Liu, Rangjian Qiu, Yang Gao, Aiwang Duan. Corrigendum: Role of Hydraulic Signal and ABA in Decrease of Leaf Stomatal and Mesophyll Conductance in Soil Drought-Stressed Tomato. Frontiers in Plant Science. 2021; 12 ():1.
Chicago/Turabian StyleShuang Li; Junming Liu; Hao Liu; Rangjian Qiu; Yang Gao; Aiwang Duan. 2021. "Corrigendum: Role of Hydraulic Signal and ABA in Decrease of Leaf Stomatal and Mesophyll Conductance in Soil Drought-Stressed Tomato." Frontiers in Plant Science 12, no. : 1.
The North China Plain is an important irrigated agricultural area in China. However, the effects of irrigation management on carbon emission are not well documented in this region. Due to the uneven seasonal distribution of rainfall, irrigation is mainly concentrated in the winter wheat growing season in the North China Plain. In this study, we estimated CO2 emission and soil CH4 uptake from winter wheat fields with different irrigation methods and scheduling treatments using the static chamber-gas chromatography method from April to May 2017 and 2018. Treatments included three irrigation methods (surface drip, sprinkler, and border) and three irrigation scheduling levels that initiated as soon as the soil moisture drained to 50%, 60%, and 70% of the field capacity for a 0–100 cm soil profile were tested. The results showed that both the irrigation methods and scheduling significantly influenced (p< 0.05) the cumulative CO2 and CH4 emission, grain yield, global warming potential (GWP), GWP Intensity (GWPI), GWPI per unit irrigation applied, and water use efficiency (WUE). Compared to 60% and 70% FC, 50% FC irrigation scheduling de-creased accumulated CH4 uptake 26.8–30.3% and 17.8–25.4%, and reduced accumulated CO2 emissions 7.0–15.3% and 12.6–19.4%, respectively. Conversely, 50% FC reduced GWP 6.5–13.3% and 12.5–19.4% and lower grain yield 10.4–19.7% and 8.5–16.6% compared to 60% and 70% FC irrigation scheduling in 2017 and 2018, respectively. Compared to sprinkler irrigation and border irrigation, drip irrigation at 60% FC increased the accumulated CH4 uptake 11.3–12.1% and 1.9–5.5%, while reduced the accumulated CO2 emissions from 7.5–8.8% and 10.1–12.1% in 2017 and 2018, respectively. Moreover, drip irrigation at 60% FC increased grain yield 5.2–7.5% and 6.3–6.8%, WUE 0.9–5.4% and 5.7–7.4%, and lowered GWP 8.0–9.8% and 10.1–12.0% compared to sprinkler and border irrigation in 2017 and 2018, respectively. The interaction of irrigation scheduling and irrigation methods significantly impacted accumulated CH4 uptake, cumulative CO2 amount, and GWP in 2018 only while grain yield and WUE in the entire study. Overall, drip irrigation at 60% FC is the optimal choice in terms of higher grain yield, WUE, and mitigating GWP and GWPI from winter wheat fields in North China Plain.
Faisal Mehmood; Guangshuai Wang; Yang Gao; Yueping Liang; Muhammad Zain; Shafeeq Rahman; Aiwang Duan. Impacts of Irrigation Managements on Soil CO2 Emission and Soil CH4 Uptake of Winter Wheat Field in the North China Plain. Water 2021, 13, 2052 .
AMA StyleFaisal Mehmood, Guangshuai Wang, Yang Gao, Yueping Liang, Muhammad Zain, Shafeeq Rahman, Aiwang Duan. Impacts of Irrigation Managements on Soil CO2 Emission and Soil CH4 Uptake of Winter Wheat Field in the North China Plain. Water. 2021; 13 (15):2052.
Chicago/Turabian StyleFaisal Mehmood; Guangshuai Wang; Yang Gao; Yueping Liang; Muhammad Zain; Shafeeq Rahman; Aiwang Duan. 2021. "Impacts of Irrigation Managements on Soil CO2 Emission and Soil CH4 Uptake of Winter Wheat Field in the North China Plain." Water 13, no. 15: 2052.
Drought reduces leaf stomatal conductance (gs) and mesophyll conductance (gm). Both hydraulic signals and chemical signals (mainly abscisic acid, ABA) are involved in regulating gs. However, it remains unclear what role the endogenous ABA plays in gm under decreasing soil moisture. In this study, the responses of gs and gm to ABA were investigated under progressive soil drying conditions and their impacts on net photosynthesis (An) and intrinsic water use efficiency (WUEi) were also analyzed. Experimental tomato plants were cultivated in pots in an environment-controlled greenhouse. Reductions of gs and gm induced a 68–78% decline of An under drought conditions. While soil water potential (Ψsoil) was over −1.01 MPa, gs reduced as leaf water potential (Ψleaf) decreased, but ABA and gm kept unchanged, which indicating gs was more sensitive to drought than gm. During Ψsoil reduction from −1.01 to −1.44 MPa, Ψleaf still kept decreasing, and both gs and gm decreased concurrently following to the sustained increases of ABA content in shoot sap. The gm was positively correlated to gs during a drying process. Compared to gs or gm, WUEi was strongly correlated with gm/gs. WUEi improved within Ψsoil range between −0.83 and −1.15 MPa. In summary, gs showed a higher sensitivity to drought than gm. Under moderate and severe drought at Ψsoil ≤ −1.01 MPa, furthermore from hydraulic signals, ABA was also involved in this co-ordination reductions of gs and gm and thereby regulated An and WUEi.
Shuang Li; Junming Liu; Hao Liu; Rangjian Qiu; Yang Gao; Aiwang Duan. Role of Hydraulic Signal and ABA in Decrease of Leaf Stomatal and Mesophyll Conductance in Soil Drought-Stressed Tomato. Frontiers in Plant Science 2021, 12, 1 .
AMA StyleShuang Li, Junming Liu, Hao Liu, Rangjian Qiu, Yang Gao, Aiwang Duan. Role of Hydraulic Signal and ABA in Decrease of Leaf Stomatal and Mesophyll Conductance in Soil Drought-Stressed Tomato. Frontiers in Plant Science. 2021; 12 ():1.
Chicago/Turabian StyleShuang Li; Junming Liu; Hao Liu; Rangjian Qiu; Yang Gao; Aiwang Duan. 2021. "Role of Hydraulic Signal and ABA in Decrease of Leaf Stomatal and Mesophyll Conductance in Soil Drought-Stressed Tomato." Frontiers in Plant Science 12, no. : 1.
Background Glycine betaine (GB) plays a crucial role in plants responding to abiotic stresses. Studying the physiological response of cotton seedlings to exogenous GB under salt stress provides a reference for the application of GB to improve the resistance of cotton seedlings under salt stress. The purpose of this research is to examine the impacts of foliar-applied GB on leaf stomatal structure and characteristics, gas exchange and chlorophyll fluorescence characteristics and plant growth indicators of Gossypium hirsutum L. under NaCl stress conditions. Results Under the salinity of 150 mM, the four concentrations of GB are 0, 2.5, 5, and 7.5 mM, and the control (CK) was GB-untreated non-saline. Salt stress negatively affected leaf stomata as well as gas exchange and chlorophyll fluorescence and decreased plant growth parameters of cotton seedlings. The treatment with 5 mM GB significantly increased the evolution of photosynthetic rate (P n ), transpiration rate (T r ), intracellular CO2 concentration (C i ) and stomatal conductance (g s ) compared to the GB-untreated saline treatment. The Exogenous foliar-applied GB has sustainably decreased the carboxylation efficiency (P n /C i ) and water use efficiency (WUE). The concentration of 5 mM GB leads to a significant improvement of leaf stomatal characteristics. The leaf gas exchange attributes correlated positively with stomatal density (SD), stomatal length (SL) and stomatal with (SW). Conclusion The overall results suggested that exogenous foliar supplementation with GB can effectively alleviate the damage of salt stress to cotton seedlings. The effect of applying 5 mM GB could be an optional choice for protecting cotton seedlings from NaCl stress through promoting the stomatal functions, photosynthetic activities and growth characteristics.
Abdoul Kader Mounkaila Hamani; Shuang Li; Jinsai Chen; Abubakar Sunusi Amin; Guangshuai Wang; Shen Xiaojun; Muhammad Zain; Yang Gao. Linking exogenous foliar application of glycine betaine and stomatal characteristics with salinity stress tolerance in cotton (Gossypium hirsutum L.) seedlings. BMC Plant Biology 2021, 21, 1 -12.
AMA StyleAbdoul Kader Mounkaila Hamani, Shuang Li, Jinsai Chen, Abubakar Sunusi Amin, Guangshuai Wang, Shen Xiaojun, Muhammad Zain, Yang Gao. Linking exogenous foliar application of glycine betaine and stomatal characteristics with salinity stress tolerance in cotton (Gossypium hirsutum L.) seedlings. BMC Plant Biology. 2021; 21 (1):1-12.
Chicago/Turabian StyleAbdoul Kader Mounkaila Hamani; Shuang Li; Jinsai Chen; Abubakar Sunusi Amin; Guangshuai Wang; Shen Xiaojun; Muhammad Zain; Yang Gao. 2021. "Linking exogenous foliar application of glycine betaine and stomatal characteristics with salinity stress tolerance in cotton (Gossypium hirsutum L.) seedlings." BMC Plant Biology 21, no. 1: 1-12.
The application of an acidic biochar can improve plant growth and soil properties in saline conditions. In this study, we investigated the effect of acidic biochar on plant growth and nutrients contents in saline soil. Seven treatments were arranged in a complete randomized design, including control (CK), 0, 30, and 45 g biochar added to a soil having 1% and 1.5% salts; these treatments were termed as B0S1, B30S1, B45S1 and B0S1.5, B30S1.5, B45S1.5 respectively. Experimental results showed that the plant height, leaves plant−1, leaf area, and shoot fresh and dry biomass, and root fresh and dry biomass were increased for the B45S1.5, respectively. Similarly, the highest total nitrogen (TN), total phosphorus (TP), total potassium (TK), and total sodium (Na) concentration in maize shoot were observed for B30S1, B0S1.5, CK, and B0S1.5, respectively. The highest concentrations of TN, TP, TK, and Na in root were obtained with the treatments B0S1, B0S1, B45S1, and B0S1, respectively. Soil pH, and EC decreased and nutrients concentration improved by the addition of acidic biochar. We conclude that the use of acidic biochar can be a potential source for the improvement of maize plant growth as well as mitigate the adverse effect of salt stress.
Mukesh Soothar; Abdoul Mounkaila Hamani; Mahendar Kumar Sootahar; Jingsheng Sun; Gao Yang; Saleem Bhatti; Adama Traore. Assessment of Acidic Biochar on the Growth, Physiology and Nutrients Uptake of Maize (Zea mays L.) Seedlings under Salinity Stress. Sustainability 2021, 13, 3150 .
AMA StyleMukesh Soothar, Abdoul Mounkaila Hamani, Mahendar Kumar Sootahar, Jingsheng Sun, Gao Yang, Saleem Bhatti, Adama Traore. Assessment of Acidic Biochar on the Growth, Physiology and Nutrients Uptake of Maize (Zea mays L.) Seedlings under Salinity Stress. Sustainability. 2021; 13 (6):3150.
Chicago/Turabian StyleMukesh Soothar; Abdoul Mounkaila Hamani; Mahendar Kumar Sootahar; Jingsheng Sun; Gao Yang; Saleem Bhatti; Adama Traore. 2021. "Assessment of Acidic Biochar on the Growth, Physiology and Nutrients Uptake of Maize (Zea mays L.) Seedlings under Salinity Stress." Sustainability 13, no. 6: 3150.
Sound irrigation and nitrogen management strategies are necessary to achieve sustainable yield and water use efficiency of winter wheat in the North China Plain (NCP). The coupled effects of irrigation scheduling and the nitrogen application mode (NAM) on winter wheat growth, yield and water use efficiency under drip irrigation were evaluated with a two-year field experiment, which consisted of three irrigation scheduling levels (ISLs) (irrigating when soil water consumption (SWC) reached 20, 35 and 50 mm, referred as I20, I35 and I50, respectively) and three nitrogen application modes (NAMs) (ratio of basal application and topdressing as 50:50, 25:75 and 0:100, referred as N50:50, N25:75 and N0:100, respectively). The experimental results showed that irrigating winter wheat at ISL I35 substantially (p < 0.05) improved the grain yield by 15.89%, 3.32% and 14.82%, 4.31% and water use efficiency (WUE) by 5.23%, 16.03% and 5.26%, 12.36%, compared with those at ISL I20 and I50 in 2017–2018 and 2018–2019 growing seasons, respectively. NAM N25:75 appeared very beneficial in terms of grain yield, yield components and WUE as compared to other NAM levels. The maximum grain yield (8.62 and 9.40 t ha−1) and water use efficiency (1.88 and 2.09 kg m−3) were achieved in treatment I35N25:75 in two growing seasons over those in other treatments. The results in this study may deliver a scientific basis for irrigation and nitrogen fertilization management of the drip-irrigated winter wheat production in the NCP.
Muhammad Zain; Zhuanyun Si; Sen Li; Yang Gao; Faisal Mehmood; Shafeeq-Ur Rahman; Abdoul Mounkaila Hamani; Aiwang Duan. The Coupled Effects of Irrigation Scheduling and Nitrogen Fertilization Mode on Growth, Yield and Water Use Efficiency in Drip-Irrigated Winter Wheat. Sustainability 2021, 13, 2742 .
AMA StyleMuhammad Zain, Zhuanyun Si, Sen Li, Yang Gao, Faisal Mehmood, Shafeeq-Ur Rahman, Abdoul Mounkaila Hamani, Aiwang Duan. The Coupled Effects of Irrigation Scheduling and Nitrogen Fertilization Mode on Growth, Yield and Water Use Efficiency in Drip-Irrigated Winter Wheat. Sustainability. 2021; 13 (5):2742.
Chicago/Turabian StyleMuhammad Zain; Zhuanyun Si; Sen Li; Yang Gao; Faisal Mehmood; Shafeeq-Ur Rahman; Abdoul Mounkaila Hamani; Aiwang Duan. 2021. "The Coupled Effects of Irrigation Scheduling and Nitrogen Fertilization Mode on Growth, Yield and Water Use Efficiency in Drip-Irrigated Winter Wheat." Sustainability 13, no. 5: 2742.
Soil salinization adversely affects agricultural productivity. Mitigating the adverse effects of salinity represents a current major challenge for agricultural researchers worldwide. The effects of exogenously applied glycine betaine (GB) and salicylic acid (SA) on mitigating sodium toxicity and improving the growth of cotton seedlings subjected to salt stress remain unclear. The treatments in a phytotron included a control (CK, exogenously untreated, non-saline), two NaCl conditions (0 and 150 mM), four exogenous GB concentrations (0, 2.5, 5.0, and 7.5 mM), and four exogenous SA concentrations (0, 1.0, 1.5, and 2.0 mM). The shoot and roots exposed to 150 mM NaCl without supplementation had significantly higher Na+ and reduced K+, Ca2+, and Mg2+ contents, along with lowered biomass, compared with those of CK. Under NaCl stress, exogenous GB and SA at all concentrations substantially inversed these trends by improving ion uptake regulation and biomass accumulation compared with NaCl stress alone. Supplementation with 5.0 mM GB and with 1.0 mM SA under NaCl stress were the most effective conditions for mitigating Na+ toxicity and enhancing biomass accumulation. NaCl stress had a negative effect on plant growth parameters, including plant height, leaf area, leaf water potential, and total nitrogen (N) in the shoot and roots, which were improved by supplementation with 5.0 mM GB or 1.0 mM SA. Supplementation with 5.0 mM exogenous GB was more effective in controlling the percentage loss of conductivity (PLC) under NaCl stress.
Abdoul Hamani; Jinsai Chen; Mukesh Soothar; Guangshuai Wang; Xiaojun Shen; Yang Gao; Ranjian Qiu. Application of Exogenous Protectants Mitigates Salt-Induced Na+ Toxicity and Sustains Cotton (Gossypium hirsutum L.) Seedling Growth: Comparison of Glycine Betaine and Salicylic Acid. Plants 2021, 10, 380 .
AMA StyleAbdoul Hamani, Jinsai Chen, Mukesh Soothar, Guangshuai Wang, Xiaojun Shen, Yang Gao, Ranjian Qiu. Application of Exogenous Protectants Mitigates Salt-Induced Na+ Toxicity and Sustains Cotton (Gossypium hirsutum L.) Seedling Growth: Comparison of Glycine Betaine and Salicylic Acid. Plants. 2021; 10 (2):380.
Chicago/Turabian StyleAbdoul Hamani; Jinsai Chen; Mukesh Soothar; Guangshuai Wang; Xiaojun Shen; Yang Gao; Ranjian Qiu. 2021. "Application of Exogenous Protectants Mitigates Salt-Induced Na+ Toxicity and Sustains Cotton (Gossypium hirsutum L.) Seedling Growth: Comparison of Glycine Betaine and Salicylic Acid." Plants 10, no. 2: 380.
High planting density and nitrogen shortage are two important limiting factors for crop yield. Phytohormones, abscisic acid (ABA), and jasmonic acid (JA), play important roles in plant growth. A pot experiment was conducted to reveal the role of ABA and JA in regulating leaf gas exchange and growth in response to the neighborhood of plants under different nitrogen regimes. The experiment included two factors: two planting densities per pot (a single plant or four competing plants) and two N application levels per pot (1 and 15 mmol·L−1). Compared to when a single plant was grown per pot, neighboring competition decreased stomatal conductance (gs), transpiration (Tr) and net photosynthesis (Pn). Shoot ABA and JA and the shoot-to-root ratio increased in response to neighbors. Both gs and Pn were negatively related to shoot ABA and JA. In addition, N shortage stimulated the accumulation of ABA in roots, especially for competing plants, whereas root JA in competing plants did not increase in N15. Pearson’s correlation coefficient (R2) of gs to ABA and gs to JA was higher in N1 than in N15. As compared to the absolute value of slope of gs to shoot ABA in N15, it increased in N1. Furthermore, the stomatal limitation and non-stomatal limitation of competing plants in N1 were much higher than in other treatments. It was concluded that the accumulations of ABA and JA in shoots play a coordinating role in regulating gs and Pn in response to neighbors; N shortage could intensify the impact of competition on limiting carbon fixation and plant growth directly.
Shuang Li; Abdoul Kader Mounkaila Hamani; Zhuanyun Si; Yueping Liang; Yang Gao; Aiwang Duan. Leaf Gas Exchange of Tomato Depends on Abscisic Acid and Jasmonic Acid in Response to Neighboring Plants under Different Soil Nitrogen Regimes. Plants 2020, 9, 1674 .
AMA StyleShuang Li, Abdoul Kader Mounkaila Hamani, Zhuanyun Si, Yueping Liang, Yang Gao, Aiwang Duan. Leaf Gas Exchange of Tomato Depends on Abscisic Acid and Jasmonic Acid in Response to Neighboring Plants under Different Soil Nitrogen Regimes. Plants. 2020; 9 (12):1674.
Chicago/Turabian StyleShuang Li; Abdoul Kader Mounkaila Hamani; Zhuanyun Si; Yueping Liang; Yang Gao; Aiwang Duan. 2020. "Leaf Gas Exchange of Tomato Depends on Abscisic Acid and Jasmonic Acid in Response to Neighboring Plants under Different Soil Nitrogen Regimes." Plants 9, no. 12: 1674.
Coupling effective cultivation patterns and suitable irrigation scheduling may provide insight for the development of water-saving agricultural systems. A 2-year field experiment was conducted to determine seasonal dynamics in root water uptake (RWU) of winter wheat under a new planting pattern of High-Low Seed Beds Cultivation (HLSC). Stable isotopes of δD and δ18O in different water sources were measured and the RWU of wheat was quantified by the MIXSIAR model. The proportions of RWU from the 0∼30 cm soil layer at different growth stages were significantly different for the wheat on the low beds, while it was not significantly different for the wheat on the high beds. Winter wheat took approximately 65 % of its required water from the 0∼60 cm soil throughout all growth stages. However, for an irrigation with a 90 mm quota, the experimental result showed that only 72 % of the irrigated water was finally stored in the soil layer of 0∼60 cm, which indicated nearly 30 % of the irrigated water infiltrated below 60 cm and will be less available. These results suggested that the designed irrigation wetting depth for winter wheat should be set as less than 60 cm under HLSC pattern.
Junming Liu; Zhuanyun Si; Lifeng Wu; Jinsai Chen; Yang Gao; Aiwang Duan. Using stable isotopes to quantify root water uptake under a new planting pattern of high-low seed beds cultivation in winter wheat. Soil and Tillage Research 2020, 205, 104816 .
AMA StyleJunming Liu, Zhuanyun Si, Lifeng Wu, Jinsai Chen, Yang Gao, Aiwang Duan. Using stable isotopes to quantify root water uptake under a new planting pattern of high-low seed beds cultivation in winter wheat. Soil and Tillage Research. 2020; 205 ():104816.
Chicago/Turabian StyleJunming Liu; Zhuanyun Si; Lifeng Wu; Jinsai Chen; Yang Gao; Aiwang Duan. 2020. "Using stable isotopes to quantify root water uptake under a new planting pattern of high-low seed beds cultivation in winter wheat." Soil and Tillage Research 205, no. : 104816.
Background Application of exogenous glycine betaine (GB) and exogenous salicylic acid (SA) mitigates the adverse effects of salinity. Foliar spraying with exogenous GB or SA alleviates salt stress in plants by increasing leaf gas exchange and stimulating antioxidant enzyme activity. The effects of foliar application of exogenous GB and SA on the physiology and biochemistry of cotton seedlings subjected to salt stress remain unclear. Results Results showed that salt stress of 150 mM NaCl significantly reduced leaf gas exchange and chlorophyll fluorescence and decreased photosynthetic pigment quantities and leaf relative water content. Foliar spray concentrations of 5.0 mM exogenous GB and 1.0 mM exogenous SA promoted gas exchange and fluorescence in cotton seedlings, increased quantities of chlorophyll pigments, and stimulated the antioxidant enzyme activity. The foliar spray also increased leaf relative water content and endogenous GB and SA content in comparison with the salt-stressed only control. Despite the salt-induced increase in antioxidant enzyme content, exogenous GB and SA in experimental concentrations significantly increased the activity of glutathione reductase, ascorbate peroxidase, superoxide dismutase, catalase and peroxidase, and decreased malondialdehyde content under salt stress. Across all experimental foliar spray GB and SA concentrations, the photochemical efficiency of photosystem II (FV/FM) reached a peak at a concentration of 5.0 mM GB. The net photosynthetic rate (Pn) and FV/FM were positively correlated with chlorophyll a and chlorophyll b content in response to foliar spraying of exogenous GB and SA under salt stress. Conclusions We concluded, from our results, that concentrations of 5.0 mM GB or 1.0 mM SA are optimal choices for mitigating NaCl-induced damage in cotton seedlings because they promote leaf photosynthesis, increase quantities of photosynthetic pigments, and stimulate antioxidant enzyme activity. Among, 5.0 mM GB and 1.0 mM SA, the best performance in enhancing endogenous GB and SA concentrations was obtained with the foliar application of 1.0 mM SA under salt stress.
Abdoul Kader Mounkaila Hamani; Guangshuai Wang; Mukesh Kumar Soothar; Xiaojun Shen; Yang Gao; Rangjian Qiu; Faisal Mehmood. Responses of leaf gas exchange attributes, photosynthetic pigments and antioxidant enzymes in NaCl-stressed cotton (Gossypium hirsutum L.) seedlings to exogenous glycine betaine and salicylic acid. BMC Plant Biology 2020, 20, 1 -14.
AMA StyleAbdoul Kader Mounkaila Hamani, Guangshuai Wang, Mukesh Kumar Soothar, Xiaojun Shen, Yang Gao, Rangjian Qiu, Faisal Mehmood. Responses of leaf gas exchange attributes, photosynthetic pigments and antioxidant enzymes in NaCl-stressed cotton (Gossypium hirsutum L.) seedlings to exogenous glycine betaine and salicylic acid. BMC Plant Biology. 2020; 20 (1):1-14.
Chicago/Turabian StyleAbdoul Kader Mounkaila Hamani; Guangshuai Wang; Mukesh Kumar Soothar; Xiaojun Shen; Yang Gao; Rangjian Qiu; Faisal Mehmood. 2020. "Responses of leaf gas exchange attributes, photosynthetic pigments and antioxidant enzymes in NaCl-stressed cotton (Gossypium hirsutum L.) seedlings to exogenous glycine betaine and salicylic acid." BMC Plant Biology 20, no. 1: 1-14.
Pre-planting soil moisture plays an important role in regulating plant emergence rate and yield, yet there is a paucity of studies on the response of cotton growth and yield to pre-planting soil moisture in arid regions. In this study, the CROPGRO-Cotton model was used to simulate cotton growth and yield in a mulched drip irrigation system, with the interaction of different pre-planting soil water contents and irrigation levels during the cotton growing season. This was undertaken to determine the optimal pre-planting soil water contents and irrigation levels that would produce the highest cotton yield and biomass values in the model simulations. Experimental data of cotton phenology, and the biomass and yield at the maturing stage in 2017 and 2018 was used to calibrate and verify the DSSAT-CROPGRO-Cotton model outputs. Based on the calibrated CROPGRO-Cotton model, scenario simulation was performed using three irrigation levels (24 mm, 30 mm, 36 mm) and eight pre-planting soil water contents [1.2 θFC, 1.1 θFC, θFC (field water holding capacity), 0.9 θFC, 0.8 θFC, 0.7 θFC, 0.6 θFC, and 0.5 θFC]. The results showed that the simulated cotton phenology and seed cotton yield produced by the calibrated CROPGRO-Cotton model showed good fits with the observed values, thus, satisfying the accuracy requirement for large-scale, mulched, drip irrigated cotton field simulations. However, large deviations were observed between simulated and observed biomass values. According to the simulations, the maximum seed cotton yield and biomass can be obtained from a pre-planting soil water content of 0.8 θFC - θFC, and the maintenance of irrigation levels at 30–36 mm during the cotton growing season. These simulation results may serve as reference data for cotton crop production and irrigation management in the Tarim Basin.
Xingpeng Wang; Hongbo Wang; Zhuanyun Si; Yang Gao; Aiwang Duan. Modelling responses of cotton growth and yield to pre-planting soil moisture with the CROPGRO-Cotton model for a mulched drip irrigation system in the Tarim Basin. Agricultural Water Management 2020, 241, 106378 .
AMA StyleXingpeng Wang, Hongbo Wang, Zhuanyun Si, Yang Gao, Aiwang Duan. Modelling responses of cotton growth and yield to pre-planting soil moisture with the CROPGRO-Cotton model for a mulched drip irrigation system in the Tarim Basin. Agricultural Water Management. 2020; 241 ():106378.
Chicago/Turabian StyleXingpeng Wang; Hongbo Wang; Zhuanyun Si; Yang Gao; Aiwang Duan. 2020. "Modelling responses of cotton growth and yield to pre-planting soil moisture with the CROPGRO-Cotton model for a mulched drip irrigation system in the Tarim Basin." Agricultural Water Management 241, no. : 106378.
Root growth alters the rhizosphere thereby affecting root uptake of water and nutrients. However, the influence of abiotic stress on this process is poorly understood. In this study we investigated the effects of water and salinity stresses (both in isolation and combined) on maize (Zea mays L.). Seedlings were grown in pots packed with a loamy sand soil for two weeks and then subjected to water and salinity stresses, together with an unstressed control. After an additional two weeks, plants were removed from the pots and the soil aggregates adhering to the roots were collected and scanned using X-ray Computed Tomography. The ability of the aggregates to conduct water was calculated from pore-scale simulation of water flow using the lattice Boltzmann method. It was found that both water and salinity stresses reduced the permeability of the rhizospheric aggregates, although the reduction under salinity stress was more significant than under water stress. Combining water and salinity stresses reduced the permeability of the rhizosphere by one order in magnitude compared to the unstressed rhizosphere. Abiotic stresses work with root-induced activity to reshape the rhizosphere. As water and nutrients need to pass through the rhizosphere before being taken up by roots, understanding such rhizosphere changes has an important implication in plant acquisition of soil resources.
Di Wang; Yang Gao; Ming Li; Craig J. Sturrock; Andrew Gregory; Xiaoxian Zhang. Change in hydraulic properties of the rhizosphere of maize under different abiotic stresses. Plant and Soil 2020, 452, 615 -626.
AMA StyleDi Wang, Yang Gao, Ming Li, Craig J. Sturrock, Andrew Gregory, Xiaoxian Zhang. Change in hydraulic properties of the rhizosphere of maize under different abiotic stresses. Plant and Soil. 2020; 452 (1):615-626.
Chicago/Turabian StyleDi Wang; Yang Gao; Ming Li; Craig J. Sturrock; Andrew Gregory; Xiaoxian Zhang. 2020. "Change in hydraulic properties of the rhizosphere of maize under different abiotic stresses." Plant and Soil 452, no. 1: 615-626.
During four consecutive growing seasons (2014–2018), field experiments were conducted in the North China to determine winter wheat production function. The field experiments were carried out using winter wheat subjected to four N levels (N120, N180, N240, and N300) and three irrigation levels (If, I0.8f, and I0.6f). The main aims were to characterize winter wheat productivity, drought response factor Ky, and the winter wheat grain yield production functions in relation to water supply under the different N fertilizer levels. The amount of water supply (rain + irrigation) were 326–434, 333–441, 384–492, and 332–440 mm in 2014–2015, 2015–2016, 2016–2017, and 2017–2018 growing seasons, respectively. Similarly, the values of ETa (including the contribution from soil water storage) were 413–466, 384–468, 401–466, and 417–467 mm in 2014–2015, 2015–2016, 2016–2017, and 2017–2018, respectively. ETa increased as the amount of irrigation increased. The average values of If, I0.8f, and I0.6f over the four growing seasons were 459–465, 432–446, and 404–413 mm, respectively. For the same amount of irrigation, there was only small difference in ETa among different nitrogen levels; for the three irrigation levels, the values of ETa in N120, N180, N240, and N300 ranged from 384 to 466, 384 to 466, 385 to 467, and 407 to 468 mm, respectively. Water productivity values ranged from 1.69 to 2.50 kg m−3 for (rain + irrigation) and 1.45 to 2.05 kg·m−3 for ETa. The Ky linearly decreased with the increase in nitrogen amount, and the values of r were greater than 0.92. The values of Ky for winter wheat in N120, N180, N240, and N300 were 1.54, 1.41, 1.28, and 1.25, respectively. The mean value of Ky for winter wheat over the three irrigation levels and the four nitrogen levels was 1.37 (r = 0.95). In summary, to gain higher grain yield and WUE, optimal combination of N fertilizer of 180–240 kg·ha−1 and irrigation quota of 36–45 mm per irrigation should be applied for winter wheat with drip fertigation in the North China Plain.
Xiaojun Shen; Guangshuai Wang; Ketema Tilahun Zeleke; Zhuanyun Si; Jinsai Chen; Yang Gao. Crop Water Production Functions for Winter Wheat with Drip Fertigation in the North China Plain. Agronomy 2020, 10, 876 .
AMA StyleXiaojun Shen, Guangshuai Wang, Ketema Tilahun Zeleke, Zhuanyun Si, Jinsai Chen, Yang Gao. Crop Water Production Functions for Winter Wheat with Drip Fertigation in the North China Plain. Agronomy. 2020; 10 (6):876.
Chicago/Turabian StyleXiaojun Shen; Guangshuai Wang; Ketema Tilahun Zeleke; Zhuanyun Si; Jinsai Chen; Yang Gao. 2020. "Crop Water Production Functions for Winter Wheat with Drip Fertigation in the North China Plain." Agronomy 10, no. 6: 876.
The cycle of key nutrient elements nitrogen (N) and phosphorus (P) has been massively altered by anthropogenic activities. Little is known about the impacts on greenhouse gas (GHG) emission of the large nutrient additions occurring in the alpine grasslands of the Tibetan Plateau. We investigated soil surface emissions of carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) under control, N, P and combined nitrogen and phosphorus (NP) additions from July 2011 to September 2012. Compared to the control, CO2 flux significantly increased by 14.6% and 27.4% following P and NP addition, respectively. The interaction of NP addition had a significant influence on CO2 flux during the non-growing season and the spring thaw period. Compared to the control, CH4 flux decreased by 9.9%, 23.2% and 26.7% following N, P and NP additions, respectively, and no interactive effect of NP addition was found in any period. Soil N2O flux was significantly increased 2.6 fold and 3.3 fold, following N and NP addition treatments, respectively, and there was no interaction effect of NP addition together. The contribution of cumulative CO2 emission during the non-growing season was less than 20% of the annual budget, but cumulative CH4 and N2O emissions during the same period can account for 37.3–48.9% and 44.7–59.5% of the annual budget, respectively. Methane and N2O emissions did not increase greatly during the spring thawing period, with contributions of only 0.4–3.6% and 10.3–12.3% of the annual budget, respectively. Our results suggest that N and P addition could increase CO2 and N2O emissions and reduce CH4 emission. Furthermore, although the non-growing season is very cold and long, cumulative CH4 and N2O emissions are considerable during this period and cannot be neglected by future studies evaluating the greenhouse gas emission budget in the Tibetan plateau.
Guangshuai Wang; Yueping Liang; Fei Ren; Xiaoxia Yang; Zhaorong Mi; Yang Gao; Timothy S. George; Zhenhua Zhang. Greenhouse Gas Emissions from the Tibetan Alpine Grassland: Effects of Nitrogen and Phosphorus Addition. Sustainability 2018, 10, 4454 .
AMA StyleGuangshuai Wang, Yueping Liang, Fei Ren, Xiaoxia Yang, Zhaorong Mi, Yang Gao, Timothy S. George, Zhenhua Zhang. Greenhouse Gas Emissions from the Tibetan Alpine Grassland: Effects of Nitrogen and Phosphorus Addition. Sustainability. 2018; 10 (12):4454.
Chicago/Turabian StyleGuangshuai Wang; Yueping Liang; Fei Ren; Xiaoxia Yang; Zhaorong Mi; Yang Gao; Timothy S. George; Zhenhua Zhang. 2018. "Greenhouse Gas Emissions from the Tibetan Alpine Grassland: Effects of Nitrogen and Phosphorus Addition." Sustainability 10, no. 12: 4454.