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Frequent flash droughts can rapidly lead to water shortage, which affects the stability of ecosystems. This study determines the water-use characteristics and physiological mechanisms underlying Moso bamboo response to flash-drought events, and estimates changes to water budgets caused by extreme drought. We analyzed the variability in forest canopy transpiration versus precipitation from 2011–2013. Evapotranspiration reached 730 mm during flash drought years. When the vapor pressure deficit > 2 kPa and evapotranspiration > 4.27 mm·day−1, evapotranspiration was mainly controlled through stomatal opening and closing to reduce water loss. However, water exchange mainly occurred in the upper 0–50 cm of the soil. When soil volumetric water content of 50 cm was lower than 0.17 m3·m−3, physiological dehydration occurred in Moso bamboo to reduce transpiration by defoliation, which leads to water-use efficiency decrease. When mean stand density was
Minxia Zhang; Shulin Chen; Hong Jiang; Yong Lin; Jinmeng Zhang; Xinzhang Song; Guomo Zhou. Water-Use Characteristics and Physiological Response of Moso Bamboo to Flash Droughts. International Journal of Environmental Research and Public Health 2019, 16, 2174 .
AMA StyleMinxia Zhang, Shulin Chen, Hong Jiang, Yong Lin, Jinmeng Zhang, Xinzhang Song, Guomo Zhou. Water-Use Characteristics and Physiological Response of Moso Bamboo to Flash Droughts. International Journal of Environmental Research and Public Health. 2019; 16 (12):2174.
Chicago/Turabian StyleMinxia Zhang; Shulin Chen; Hong Jiang; Yong Lin; Jinmeng Zhang; Xinzhang Song; Guomo Zhou. 2019. "Water-Use Characteristics and Physiological Response of Moso Bamboo to Flash Droughts." International Journal of Environmental Research and Public Health 16, no. 12: 2174.
Drought has been one of the most important limiting factors for crop production, which deleteriously affects food security worldwide. The main objective of the present study was to quantitatively assess the effect of drought on the agronomic traits (e.g., plant height, biomass, yield, and yield components) of rice and wheat in combination with several moderators (e.g., drought stress intensity, rooting environment, and growth stage) using a meta-analysis study. The database was created from 55 published studies on rice and 60 published studies on wheat. The results demonstrated that drought decreased the agronomic traits differently between rice and wheat among varying growth stages. Wheat and rice yields decreased by 27.5% and 25.4%, respectively. Wheat grown in pots showed greater decreases in agronomic traits than those grown in the field. Rice showed opposite growing patterns when compared to wheat in rooting environments. The effect of drought on rice increased with plant growth and drought had larger detrimental influences during the reproductive phase (e.g., blooming stage, filling stage, and maturity). However, an exception was found in wheat, which had similar decreased performance during the complete growth cycle. Based on these results, future droughts could produce lower yields of rice and wheat when compared to the current drought.
Jinmeng Zhang; Shiqiao Zhang; Min Cheng; Hong Jiang; Xiuying Zhang; Changhui Peng; Xuehe Lu; Minxia Zhang; Jiaxin Jin. Effect of Drought on Agronomic Traits of Rice and Wheat: A Meta-Analysis. International Journal of Environmental Research and Public Health 2018, 15, 839 .
AMA StyleJinmeng Zhang, Shiqiao Zhang, Min Cheng, Hong Jiang, Xiuying Zhang, Changhui Peng, Xuehe Lu, Minxia Zhang, Jiaxin Jin. Effect of Drought on Agronomic Traits of Rice and Wheat: A Meta-Analysis. International Journal of Environmental Research and Public Health. 2018; 15 (5):839.
Chicago/Turabian StyleJinmeng Zhang; Shiqiao Zhang; Min Cheng; Hong Jiang; Xiuying Zhang; Changhui Peng; Xuehe Lu; Minxia Zhang; Jiaxin Jin. 2018. "Effect of Drought on Agronomic Traits of Rice and Wheat: A Meta-Analysis." International Journal of Environmental Research and Public Health 15, no. 5: 839.
Persistent drought severely inhibits plant growth and productivity, which negatively affects terrestrial primary productivity worldwide. Therefore, it is important to investigate the impacts of drought on plant leaf CO2/H2O exchange and water use efficiency. This study assessed the responses of net photosynthesis (Pn), stomatal conductance (Gs), transpiration (Tr), and instantaneous water use efficiency (WUE) to drought based on a worldwide meta-analysis of 112 published studies. The results demonstrated that drought decreased Pn, Tr, and Gs significantly and differently among different moderators. C4 plants had smaller Pn reduction than C3 plants, which gives C4 plants an advantage in Pn. But their WUE decreased under drought conditions, indicating a great flexibility in C4 WUE. Annual herbs sacrificed WUE (−6.2%) to maintain efficient Pn. Perennial herbs took a different strategy in response to drought with an increased WUE (25.1%). Deciduous tree species displayed a greater increase in WUE than conifers and evergreen species. Additionally, Gs had a significant correlation with Pn and Tr, but an insignificant correlation with WUE, which could be because WUE is affected by other factors (e.g., air flow, CO2 concentration, and relative humidity). These findings have significant implications for understanding the worldwide effects of drought on plant leaf CO2/H2O exchange and water use efficiency.
Jinmeng Zhang; Hong Jiang; Xinzhang Song; Jiaxin Jin; Xiuying Zhang. The Responses of Plant Leaf CO2/H2O Exchange and Water Use Efficiency to Drought: A Meta-Analysis. Sustainability 2018, 10, 551 .
AMA StyleJinmeng Zhang, Hong Jiang, Xinzhang Song, Jiaxin Jin, Xiuying Zhang. The Responses of Plant Leaf CO2/H2O Exchange and Water Use Efficiency to Drought: A Meta-Analysis. Sustainability. 2018; 10 (2):551.
Chicago/Turabian StyleJinmeng Zhang; Hong Jiang; Xinzhang Song; Jiaxin Jin; Xiuying Zhang. 2018. "The Responses of Plant Leaf CO2/H2O Exchange and Water Use Efficiency to Drought: A Meta-Analysis." Sustainability 10, no. 2: 551.