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《Acta Prataculturae Sinica》 2011-03
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Effect of salt stress on physiological and biochemical characteristics of Amorpha fruticosa seedlings

ZOU Li-na,ZHOU Zhi-yu,YAN Shu-yun,QIN Yu (College of Pastoral Agriculture Science and Technology,Lanzhou University,Lanzhou 730020,China)  
Physiological characteristics of Amorpha fruticosa leaves,including photosynthetic rate,enzyme activity,organic osmolytes etc.were studied under different soil salt concentrations.The mechanism of salt-tolerance in A.fruticosa is discussed.The net photosynthesis rate(Pn),transpiration rate(Tr),stomatal conductance(Gs) and the content of K+ decreased with reduced severity of salt stress,while the activities of SOD and POD,the contents of soluble sugar,free praline(Pro) and Na+ noticeably increased.The contents of chlorophyll a(Chla),chlorophyll b(Chlb),total chlorophyll(Chl) and carotenoid pigment increased along with the increase in soil salt concentrations,but,the ratio of Chla/Chlb showed no significant change.The results show that the improvement of leaf salt-tolerance in A.fruticosa seedlings resulted from the modulation of physiological characteristics and A.fruticosa had certain salt-tolerant characteristics.
【Fund】: 国家重点基础研究发展规划项目资助(973项目)(2007CB108903);; 甘肃省重大科技项目(2GS063-A31-010);; 国家自然科学基金项目(30800801)资助
【CateGory Index】: S793.2
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