外源Ca2＋对盐胁迫下玉米幼苗生理指标的影响

目的]分析外源Ca2对玉米幼苗在盐胁迫下的缓解效果.方法]以玉米为试验材料,用100 mmol/L NaCl对玉米进行盐胁迫处理（对照组）,试验组在此基础上加入20 mmol/L CaCl2溶液,待玉米幼苗长至三叶期后测定其生理生化指标.结果]施加了外源Ca2＋后玉米幼苗叶片中POD活性在0.05水平显著升高,可溶性糖和叶绿素含量在0.05水平显著增加;MDA和脯氨酸含量在0.05水平显著降低.结论]外源Ca2＋对玉米幼苗NaCl盐害有一定的缓解作用.

Effects of Eexogenous Ca2＋ on Physiological Index of Maize Seedlings under Salt Stress

Objective ] To analyze the alleviating effects of exogenous Ca2＋ on maize seedlings under salt stress. Methods J Taking maize as material, treating with 100 mmol/L NaCl （control group）, the experimental group on the basis of adding 20 mmol/L CaCl2 , measuring the physiological and biochemical indexes for maize seedling at 3-leaf stage. Results] After application of exogenous Ca2＋ , MDA content in leav- es of maize seedlings decreased significantly; the content of soluble sugar and chlorophyll increased significantly. Conclusion ] Exogenous Ca2＋ could alleviate action on maize seedlings under salt stress to a certain extent.