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《Acta Agriculturae Jiangxi》 2017-02
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Effects of Salt and Drought Cross Stress on Seed Germination and Protective Enzyme Activity of Wheat Seedling

HUA Zhi-rui;LI Xiao-ling;College of Biological Pharmacy and Food Engineering,Shangluo University;  
Wheat variety Shangmai 5226 was used as experimental material,different concentrations of PEG-6000 solution and Na Cl solution were used to simulate different degrees of drought stress and salt stress respectively,and the coleoptile length,germination potential and germination rate of wheat seeds,as well as the protective enzyme activity of wheat seedlings under salt and drought cross stress were studied. The results showed that:under different degrees of salt and drought cross stress,along with the extension of stress time,the relative elongation rate of seed coleoptile was decreased in general,and the activity of superoxide dismutase(SOD) and peroxidase(POD) increased first and then decreased,while the activity of catalase(CAT) decreased first and then increased. When the concentration of PEG-6000 and Na Cl solution increased,the coleoptile length,germination potential and germination rate revealed a decreasing trend,while the activity of SOD,POD and CAT increased at first and then decreased. We think that wheat seedlings have a cross adaptation to salt and drought cross stress,and moderate salt and drought stress can increase the adversity resistance of wheat.
【Fund】: 陕西省科技厅项目(2011K01-18)
【CateGory Index】: S512.1
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