不同类型盐胁迫及外源钙离子对玉米和大豆种子萌发特性的影响

Effect of Different Salt Stresses and Calcium Ions on Soybean and Maize Seed Germination Characteristics

以大豆和玉米种子为试验材料,探讨了不同类型盐胁迫及外源钙离子对大豆和玉米种子萌发的影响。结果显示:碱性盐对种子萌发的抑制作用要强于中性盐,外源钙离子能够有效提高盐胁迫下大豆和玉米种子中α-淀粉酶、蛋白酶的活性,可溶性糖含量,缓解盐胁迫下种子有机物质分解过程。进而提高盐胁迫下大豆和玉米种子的萌发率、根长或芽长、生物量及含水量等。这种缓解作用在碱性盐胁迫下表现更加显著,对盐敏感性豆科植物的缓解效果更加明显。

Soybean and maize seeds were selected as experiment material. The effect of different types salts stress and calcium on the seeds germination has been researched. The results showed that seed germination inhibition under alkali salts were significantly greater than neutral salt. Applied calcium could effectually improve the activity of α - amylase and protease and the soluble carbohydrate content, alleviate organic matter decomposition process of seeds under salt stress. Further, applied calcium could improve the germination rate, the length of root and shoot, biomass and water content under salt stress. This alleviation under alkali sahs stress was more significant, and more obvious to the salt sensitivity of leguminous plant.