TITLE	Senescence of rice leaves XXXV. Promotive effects of jasmonates
AUTHOR	Kuo Tung Hung Department of Agronomy, National Taiwan University, Taipei, Taiwan, Republic of China Ching Huei Kao Department of Agronomy, National Taiwan University, Taipei, Taiwan, Republic of China
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ABSTRACT	Promotion of the senescence of detached rice leaves by jasmonates was investigated. The senescence of detached rice leaves was promoted by linolenic acid, the precursor of the biosynthesis of jasmonic acid, and retarded by inhibitors of lipoxygenase, the first enzyme in the biosynthetic pathway of jasmonic acid. Linolenic acid-promoted senescence was found to be inhibited by lipoxygenase inhibitors. Among the four major lipoxygenase pathway metabolites studied, jasmonic acid and methyl jasmonate were effective in promoting the senescence of detached rice leaves while traumatic acid and trans-2-hexenal had no or only marginal effect on it. The results support a role for endogenous jasmonates in regulating the senescence of detached rice leaves.
KEYWORD	Jasmonic acid; Leaf senescence; Methyl jasmonate; Oryza sativa L;
ARTICLE INFO	Botanical Bulletin of Academia Sinica, Volume 38 Number 2 April 1997, page 85-89, 5 pages
PUBLISHER	Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan, Republic of China