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《Journal of Beijing Agricultural College》 2003-01
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The Effects of Water Stress on Osmotic Adjustment of Aidang Pears

Wang You Nian,Yang Ai Zhen,Yuan Yuan,Yu Tong Quan Gu Jiu Cheng (Beijing Agricultural College, Beijing 102206)  
Two year old seedlings of aidang pears were used for studying the effects of water stress on osmotic adjustment .The results showed that: the water contents of plant' tissue decreased and the leaf water potential raised when soil water content dropped.under water stress.The capacity for osmotic adjustment in pear leaves occurred in responds to water stress with increasing water stress level .K + were found to be the initial massager of osmotic adjustment .When K + reached certain concentration,a lot of prolines and free amino acid was induced .As another major material of osmotic adjustment ,the content of soluble sugar was still increasing .When water stress got to certain value, the permeance of cell membrane increased markedly ,leading to plant death.
【Fund】: 国务院移民局和北京市自然科学基金资助 ;; 北京市农业应用新技术重点实验室支持
【CateGory Index】: S661.2
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