Gain- and loss-of-function mutations in Zat10 enhance the tolerance of plants to abiotic stress

FEBS Lett. 2006 Dec 11;580(28-29):6537-42. doi: 10.1016/j.febslet.2006.11.002. Epub 2006 Nov 9.

Abstract

C(2)H(2)-zinc finger proteins that contain the EAR repressor domain are thought to play a key role in modulating the defense response of plants to abiotic stress. Constitutive expression of the C(2)H(2)-EAR zinc finger protein Zat10 in Arabidopsis was found to elevate the expression of reactive oxygen-defense transcripts and to enhance the tolerance of plants to salinity, heat and osmotic stress. Surprisingly, knockout and RNAi mutants of Zat10 were also more tolerant to osmotic and salinity stress. Our results suggest that Zat10 plays a key role as both a positive and a negative regulator of plant defenses.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Abscisic Acid / pharmacology*
  • Adaptation, Physiological / drug effects*
  • Arabidopsis / genetics
  • Arabidopsis / immunology
  • Arabidopsis / physiology*
  • Arabidopsis Proteins / genetics*
  • Gene Expression / drug effects
  • Gene Expression Regulation, Plant / drug effects
  • Genes, Plant
  • Mutation / genetics*
  • Plants, Genetically Modified
  • RNA, Messenger / genetics
  • RNA, Messenger / metabolism
  • Seedlings / drug effects
  • Sodium Chloride / pharmacology*

Substances

  • Arabidopsis Proteins
  • RNA, Messenger
  • Zat10 protein, Arabidopsis
  • Sodium Chloride
  • Abscisic Acid