NaCl胁迫对玉米种子萌发的抑制及外源Ca^2＋的缓解效应

Effect of NaCl Stress on Germination of Maize Seeds and Alleviation Role of Exogenous Ca 2+

在ＮａＣｌ胁迫下，玉米种子在萌发过程中种子内Ｎａ＋含量大量增加，Ｃａ２＋含量显著减少，种子内α－淀粉酶活性降低，导致玉米种子萌发率降低，萌发期延迟。外加Ｃａ２＋使ＮａＣｌ胁迫下玉米种子内α－淀粉酶活性升高。

The Na + content in germinating maize seeds was largely increased,but the Ca 2+ content and the activity of α amylase in germinating seeds were remarkably decreased under NaCl stress.Therefore,the germination of maize seeds was decreased and delayed by salt stress.Exogenous supply of Ca 2+ increased the activity of α amylase and the germination of maize seeds under NaCl stress.