Connections between Sphingosine Kinase and Phospholipase D in the Abscisic Acid Signaling Pathway in Arabidopsis

Liang Guo, Girish Mishra, Jennifer E. Markham, Maoyin Li, Amanda Tawfall, Ruth Welti, Xuemin Wang

Research output: Contribution to journalArticlepeer-review

Abstract

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

Results: Ablation of SPHKs and PLD α1 attenuates ABA-induced production of LCBPs and PA. Phyto-S1P closes stomata in sphk 1 , sphk 2, but not in pld α1 , 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.

Original languageAmerican English
JournalDefault journal
Volume287
DOIs
StatePublished - Mar 9 2012

Disciplines

  • Biochemistry
  • Biochemistry, Biophysics, and Structural Biology
  • Biotechnology
  • Life Sciences
  • Other Biochemistry, Biophysics, and Structural Biology
  • Plant Biology
  • Biology

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