首页|期刊导航|中国农业科学（英文版）|Growth and Eco-Physiological Performance of Cotton Under Water Stress Conditions
中国农业科学（英文版）2007，Vol.6Issue(8)：949-955,7.
Growth and Eco-Physiological Performance of Cotton Under Water Stress Conditions
Growth and Eco-Physiological Performance of Cotton Under Water Stress Conditions
摘要
Abstract
A cotton cultivar Xinluzao 8 was grown under four levels of water stress treatments (normal irrigation, slight, mild and severe water stress) from the initial reproductive growth stage in Shihezi, Xinjiang, China, in 2002, to evaluate the growth and eco-physiological performances. Under water stress conditions, the transpiration ability decreased while the leaf temperature increased. Although the relative leaf water content decreased as water stress increased, the differences among the treatments were small, indicating that cotton has high ability in maintaining water in leaf. The stomatal density increased as water stress increased, while the maximum stomatal aperture reduced only in the severest stressed plants.The time of the maximum stomatal aperture was delayed in the mild and severe stressed plants. When severe stress occurred, the stomata were kept open until the transpiration decreased to nearly zero, suggesting that the stomata might not be the main factor in adjusting transpiration in cotton. Cotton plant has high adaptation ability to water stress conditions because of decrease in both stomatal conductance and hydraulic conductance from soil-to-leaf pathway. The actual quantum yield of photosystem Ⅱ (PS Ⅱ) decreased under water stress conditions, while the maximum quantum yield of PS Ⅱ did not vary among treatments, suggesting that PS Ⅱ would not be damaged by water stress. The total dry weight reduced as water stress increased.关键词
cotton/eco-physiological performance/water stress/transpiration/stomatal apertureKey words
cotton/eco-physiological performance/water stress/transpiration/stomatal aperture分类
农业科技引用本文复制引用
WANG Chun-yan,Isoda Akihiro,LI Mao-song,WANG Dao-long..Growth and Eco-Physiological Performance of Cotton Under Water Stress Conditions[J].中国农业科学（英文版）,2007,6(8):949-955,7.基金项目
The research is supported by National 863 Program of China (2006AA100215, 2006AA100202) and the National Science and Technology Planning Project Contract Research, China (2006BAD04B07). The authors are grateful to all members of the Shihezi Agricultural and Environmental Institute for Arid Area in Central Asia, Shihezi, Xinjiang, China, for their cooperation in data collection. （2006AA100215, 2006AA100202）
