Biochemistry, Department of

 

ORCID IDs

0000-0003-2397-3131 (JEM)

Document Type

Article

Date of this Version

3-9-2012

Citation

Journal of Biological Chemistry (March 9, 2012) 287(11): 8,286–8,296

doi: 10.1074/jbcM111.274274

Comments

Copyright 2012, American Society for Biochemistry and Molecular Biology. Used by permission.

Abstract

Background: Sphingosine kinase (SPHK) and phospholipaseD(PLD) produce different lipid mediators involved in abscisic acid (ABA) response.

Results: Ablation of SPHKs and PLDα1 attenuates ABA-induced production of LCBPs and PA. Phyto-S1P closes stomata in sphk1, sphk2, but not in pldα1, whereas PA closes stomata in all mutants.

Conclusion: SPHK acts upstream of PLDα1, whereas PLDα1 promotes SPHK.

Significance: The roles of lipid messengers in the ABA signaling pathway are clarified.

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