水分胁迫下钙对大豆膜脂过氧化保护酶系统的影响  

Effect of Calcium on Anti-Oxidant Enzymes of Lipid Peroxidation of Soybean Leaves Under Water Stress

作　　者：高向阳[1] 杨根平[2] 许志强[1] 徐凤彩[1] 

机构地区：[1]华南农业大学生物技术学院,广州510642 [2]西北农业大学基础部

出　　处：《华南农业大学学报》1999年第2期7-12,共6页Journal of South China Agricultural University

摘　　要：用控制营养钙量的方法培养大豆幼苗，得到3种钙水平的大豆幼苗作材料，对水分胁迫下（-0．5MPaPEG－6000），不同钙水平大豆叶片饱和持水，超氧化物歧化酶、过氧化物酶、过氧化氢酶及其同工酶进行研究，以期从膜脂过氧化的角度探讨钙在植物抗旱中的作用．In order to probe the roles of calcium in drought resistance of plants, the soybean seedlinggrown in the solntion with different calcium conentration (0, 5, 14 mmol.L-1)were used to study theeffects of water stress (- 0.5 Mpa, PEG 600) on the activities of SOD, POD and CAT and theirisozymes in the leaves of differen calcium. The results showed that under water stress, the SOD activityincreased, the CAT activity deceased. Similar tendency of POD activity was found among the leaves ofthree Ca2+ treatments, it was 'increased Becreased.' The PAGE analysis showed that under waterstress condition, there were 10 bands of SOD, 3 bands of CAT in the leaves of different Ca2+ treatmnts.There were changes in bands of POD under both conditions.

关 键 词：水分胁迫 钙 膜脂过氧化 保护酶系统 大豆 

分 类 号：Q946.5[生物学—植物学] S565.101[农业科学—作物学]