학술논문
Arabidopsis zinc-finger protein 2 is a negative regulator of ABA signaling during seed germination
Document Type
Article
Author
Source
Subject
*ZINC-finger proteins
*ARABIDOPSIS
*SEEDLINGS
*CELLULAR signal transduction
*GERMINATION
*ABSCISIC acid
*PLANT physiology
*EFFECT of stress on plants
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Language
ISSN
0176-1617
Abstract
Abstract: The hormone abscisic acid (ABA) mediates plant development and adaptation to environmental stresses. ABA-dependent transcription factors are central regulators of ABA signaling. Here, we report on the identification of the ABA-induced transcriptional repressor Arabidopsis zinc-finger protein 2 (AZF2) as ABA signaling component. We isolated azf2-1 mutants lacking AZF2 full-length transcripts that were hypersensitive to ABA during seed germination. In line with a function of AZF2 in seed germination and seedling development, AZF2-promoter activity was observed in radicles and young cotyledons of AZF2-promoter:GUS plants. Our results indicate that AZF2 is a negative regulator of ABA signaling in seeds. [Copyright &y& Elsevier]