Issue Archive

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;

Received: 　　Accepted:

Corresponding author: 　　E-mail:

Citing This Article：

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).