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PMID:18267087

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Citation

Hyun, Y, Choi, S, Hwang, HJ, Yu, J, Nam, SJ, Ko, J, Park, JY, Seo, YS, Kim, EY, Ryu, SB, Kim, WT, Lee, YH, Kang, H and Lee, I (2008) Cooperation and functional diversification of two closely related galactolipase genes for jasmonate biosynthesis. Dev. Cell 14:183-92

Abstract

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.

Links

PubMed Online version:10.1016/j.devcel.2007.11.010

Keywords

Arabidopsis/enzymology; Arabidopsis/genetics; Arabidopsis/growth & development; Arabidopsis/ultrastructure; Arabidopsis Proteins/genetics; Arabidopsis Proteins/metabolism; Carboxylic Ester Hydrolases/genetics; Chloroplasts/metabolism; Cyclopentanes/metabolism; Gene Expression Regulation, Plant; Genes, Plant; Genetic Variation; Organ Specificity; Oxylipins/metabolism; Phenotype; Phospholipase D/metabolism; Phospholipases A/metabolism; Phospholipases A1/metabolism; Plant Leaves/growth & development; Plant Leaves/metabolism; Plant Stems/growth & development; Plant Stems/metabolism; Seedling/ultrastructure; Transcriptional Activation/genetics

Significance

Annotations

Gene product Qualifier GO Term Evidence Code with/from Aspect Extension Notes Status

ARATH:PLA12

involved_in

GO:0030308: negative regulation of cell growth

ECO:0000315: mutant phenotype evidence used in manual assertion

P

Seeded From UniProt

complete

ARATH:PLA12

located_in

GO:0009507: chloroplast

ECO:0000314: direct assay evidence used in manual assertion

C

Seeded From UniProt

complete

ARATH:PLA12

involved_in

GO:0009695: jasmonic acid biosynthetic process

ECO:0000315: mutant phenotype evidence used in manual assertion

P

Seeded From UniProt

complete

ARATH:PLA12

involved_in

GO:0009611: response to wounding

ECO:0000270: expression pattern evidence used in manual assertion

P

Seeded From UniProt

complete

ARATH:PLA12

involved_in

GO:0050832: defense response to fungus

ECO:0000315: mutant phenotype evidence used in manual assertion

P

Seeded From UniProt

complete

ARATH:PLA12

enables

GO:0008970: phospholipase A1 activity

ECO:0000314: direct assay evidence used in manual assertion

F

Seeded From UniProt

complete

ARATH:PLA12

enables

GO:0047714: galactolipase activity

ECO:0000314: direct assay evidence used in manual assertion

F

Seeded From UniProt

complete


See also

References

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