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Cooperation and Functional Diversification of Two Closely Related Galactolipase Genes for Jasmonate Biosynthesis

Authors :
Sung Wook Choi
Youbong Hyun
Hyun-Ju Hwang
Jihyeon Yu
Young Sam Seo
Heonjoong Kang
Ju Young Park
Jaeyoung Ko
Ilha Lee
Sang Jip Nam
Stephen B. Ryu
Eun Yu Kim
Woo Taek Kim
Yong-Hwan Lee
Source :
Developmental Cell. 14:183-192
Publication Year :
2008
Publisher :
Elsevier BV, 2008.

Abstract

Summary Jasmonic acid (JA) plays pivotal roles in diverse plant biological processes, including wound response. Chloroplast lipid hydrolysis is a critical step for JA biosynthesis, but the mechanism of this process remains elusive. We report here that DONGLE ( DGL ), a homolog of DEFECTIVE IN ANTHER DEHISCENCE1 ( DAD1 ), encodes a chloroplast-targeted lipase with strong galactolipase and weak phospholipase A 1 activity. DGL is expressed in the leaves and has a specific role in maintaining basal JA content under normal conditions, and this expression regulates vegetative growth and is required for a rapid JA burst after wounding. During wounding, DGL and DAD1 have partially redundant functions for JA production, but they show different induction kinetics, indicating temporally separated roles: DGL plays a role in the early phase of JA production, and DAD1 plays a role in the late phase of JA production. Whereas DGL and DAD1 are necessary and sufficient for JA production, phospholipase D appears to modulate wound response by stimulating DGL and DAD1 expression.

Details

ISSN :
15345807
Volume :
14
Database :
OpenAIRE
Journal :
Developmental Cell
Accession number :
edsair.doi.dedup.....5cf47ee4a88cb5944742c40e2ae4bc22
Full Text :
https://doi.org/10.1016/j.devcel.2007.11.010