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茉莉酸甲酯对水分胁迫下花生幼苗SOD活性和膜脂过氧化作用的影响

潘瑞炽, 豆志杰, 叶庆生

华南师范大学生物系. 广东,广州 510631

摘要

茉莉酸甲酯能减缓水分胁迫时期花生幼苗(三叶期)叶片相对含水量的降低, 明显提高 抗旱性。经过茉莉酸甲酯处理的花生幼苗, 在水分胁迫条件下, 体内超氧物歧化酶和过 氧化氢酶的活性下降程度比未经处理的轻, 超氧物歧化酶同工酶酶带数则较多, 抗坏血 酸含量也较高, 以减少丙二醛在叶片中的积累。

关键词： 花生; 水分胁迫; 茉莉酸甲酯; 超氧物歧化酶; 丙二醛

Effect of methyl jasmonate on SOD activity and membrane-lipid peroxidation in peanut seedlings during water stress

Pan Ruichi, Dou Zhijie, Ye Qingsheng

Department of Biology, South China Normal University. Guangzhou 510631,Guangdong

Abstract

The relative water content and permeability in leaves could be reduced when the seedlings were treated with MJ. After MJ treatment, the activites of superoxide dismutase and catalse in seedlings were found to be kept at higher levels than those of the control. Some new SOD isoenzymic bands were observed 2 days after MJ application. Ascorbic acid content was higher in MJ-treated seedling than the control. The level of malondialdehyde, substance toxic to the membrane, was decreased when the seedlings were treated with MJ during drought. MJ, therefore, could increase the levels of protective enzymes such as SOD and CAT which were able to remove superoxide and H_(2)O_(2), respectively, and eventually, protected the integrity of plasmamembrane from drought damage.

Key words: Peanut;Water stress;Methyl jasmonate;Superoxide dismutase;Malondialdehyde

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引用本文：

潘瑞炽, 豆志杰, 叶庆生. 茉莉酸甲酯对水分胁迫下花生幼苗SOD活性和膜脂过氧化作用的影响[J]. 生理学报 1995; 47 (3): .

Pan Ruichi, Dou Zhijie, Ye Qingsheng. Effect of methyl jasmonate on SOD activity and membrane-lipid peroxidation in peanut seedlings during water stress. Acta Physiol Sin 1995; 47 (3): (in Chinese with English abstract).