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表油菜素内酯对绿豆幼叶衰老的促进作用

何宇炯, 徐如涓, 赵毓橘

中科院上海植物生理研究所.上海 200032

摘要

表油菜素内酯(epiBR) 0.05mg/L 能促进绿豆幼叶的衰老,其叶绿素和蛋白质含量均明显低于对照。绿豆幼叶经epiBR处理后,可使过氧化物酶活性明显增加,但同工酶谱无变化;超氧化物歧化酶(SOD)和过氧化氢酶(CAT)活性随epiBR处理时间的延长而降低。epiBR能促进丙二醛(MDA)含量增加,而其含量与SOD和CAT活性呈显著负相关。

关键词： 表油菜素内酯; 绿豆幼叶; 衰老; 超氧化物歧化酶; 过氧化氢酶; 过氧化物酶; 丙二醛

Enhancement of senescence by epibrassinolide in leaves of mung bean seedling

He Yujiong, Xu Rujuan, Zhao Yuju

Shanghai Institute of Plant Physiology,The Chinese Academy of Sciences.Shanghai 200032

Abstract

The study showed that epibrassinolide (epiBR) 0.05 mg/L could stimulate the senescence of light-grown mung bean seedling leaves. The contents of chlorophy11 and protein in leaves treated with epiBR decreased more rapidly than those of the control. The study also revealed that the activity of peroxidase in leaves of mung bean seedling was promoted by epiBR. The activities of both superoxide dismutase (SOD) and catalase (CAT) were inhibited by epiBR, the latter to a greater extent. On the other hand,the level of malonaldehyde (MDA) markedly increased during the senescence of leaves, and the MDA of leaves showed negative correlation with the activities of SOD and CAT. These results suggested that activated oxygen may play an importent role in the senescence of plant tissue and be regulated directly or indirectly by epi-BR.

Key words: Epibrassinolide;Mung bean seedling leaves;Senescence;Superoxide dismutase;Catalase peroxidase;Malonaldehyde;

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引用本文：

何宇炯, 徐如涓, 赵毓橘. 表油菜素内酯对绿豆幼叶衰老的促进作用[J]. 生理学报 1996; 48 (1): .

He Yujiong, Xu Rujuan, Zhao Yuju. Enhancement of senescence by epibrassinolide in leaves of mung bean seedling. Acta Physiol Sin 1996; 48 (1): (in Chinese with English abstract).