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《Journal of Anhui Agricultural Sciences》 2009-34
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Influence of Exogenous Ascorbic Acid on the Cadmium Stress Effect of Wheat in the Germination Process

ZHANG Yue-qun et al(Nantong Agricultural Vocational Technology College,Nantong,Jiangsu 226007)  
[Objective] The purpose was to research the protective effect of ascorbic acid(AsA)on the seed germination and seedling growth of wheat under cadmium(Cd)stress.[Method] With Yangmai15,Yangmai16 and Yangmai17 as tested materials,the influences of exogenous AsA on the seed germination and seedling growth of wheat under Cd stress were researched through determining the germination rates of seeds and the growth and physiological indices of seedlings.[Result] In single factor experiment,when the concn.of AsA was higher than 0.05 mmol/L,it had inhibitory effect on the growth of main roots of wheat seedlings;the inhibitory effect on the seed germination and seedling growth of wheat was intensified along with the increase of Cd concn.and the SOD activity in wheat roots had no obvious change.When the concn.of AsA was constant,the inhibitory effect on the longitudinal growth of wheat roots was intensified along with the increase of Cd concn.;when the concn.of Cd was constant,the inhibited percent of wheat treated with 0.05 mmol/L AsA was lower than that of wheat treated with the other concn.Under Cd stress,the SOD activity in wheat roots was enhanced obviously after AsA was added.The POD activity in wheat under the stress of 0.05 mmol/L Cd2+ was enhanced most by 0.05 mmol/L AsA.[Conclusion] The AsA solution at low concn.could relieve the inhibitory effect of Cd stress on the seed germination and seedling growth of wheat and the effect of AsA solution at high concn.was not obvious.
【Fund】: 南通市科技计划项目(DE2009006)
【CateGory Index】: S512.1
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