摘要
Abstract
In order to investigate the effect of SA in relieving heavy metal stress ,the effect of salicylic acid on membrane lipid peroxidation in rice seedlings leaf under copper stress were studied by water culture experiment with rice as material .The results showed that with the elevation of Cu 2 + concentration ,the membrane integrity of rice seedlings leaf was destroyed and the electric conductivity increased ,the maximum was 2 .62 times of the control group ,meanwhile the MDA content was raised significantly ,which indicated that the membrane lipid peroxidation was intensified .But when salicylic acid was drop wised during the water culture ,the electric con-ductivity and MDA content were both decreased ,which illustrated the salicylic acid could protect the integrity of membrane system in certain degree and release the membrane lipid peroxidation of rice seedlings leaf .At the same time ,salicylic acid also increased POD ,CAT and SOD activity of rice seedling leaf ,enriched protective en-zyme in plant and reinforced the ability of rice seedling opposition to heavy metal poison关键词
水稻/水杨酸/铜胁迫/膜脂过氧化Key words
rice/salicylic acid/copper stress/membrane lipid peroxidation分类
资源环境
