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Gain‐ and loss‐of‐function mutations in Zat10 enhance the tolerance of plants to abiotic stress
Author(s) -
Mittler Ron,
Kim YongSig,
Song Luhua,
Coutu Jesse,
Coutu Alicia,
Ciftci-Yilmaz Sultan,
Lee Hojoung,
Stevenson Becky,
Zhu Jian-Kang
Publication year - 2006
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/j.febslet.2006.11.002
Subject(s) - abiotic stress , arabidopsis , zinc finger , mutant , abiotic component , regulator , microbiology and biotechnology , repressor , osmotic shock , biology , salinity , reactive oxygen species , function (biology) , botany , genetics , transcription factor , gene , ecology
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.