Arabidopsis Basic Leucine Zipper Proteins That Mediate Stress-Responsive Abscisic Acid Signaling

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ID: 303350
2002
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Abstract
The phytohormone abscisic acid (ABA) plays an essential role in adaptive stress responses. The hormone regulates, among others, the expression of numerous stress-responsive genes. From various promoter analyses, ABA-responsive elements (ABREs) have been determined and a number of ABRE binding factors have been isolated, although their in vivo roles are not known. Here we report that the ABRE binding factors ABF3 and ABF4 function in ABA signaling. The constitutive overexpression of ABF3 or ABF4 in Arabidopsis resulted in ABA hypersensitivity and other ABA-associated phenotypes. In addition, the transgenic plants exhibited reduced transpiration and enhanced drought tolerance. At the molecular level, altered expression of ABA/stress-regulated genes was observed. Furthermore, the temporal and spatial expression patterns of ABF3 and ABF4 were consistent with their suggested roles. Thus, our results provide strong in vivo evidence that ABF3 and ABF4 mediate stress-responsive ABA signaling.
Reference Key
openalex_W2115195173 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Joung-youn Kang, Hyung-in Choi, Min-Young Im, Soo Young Kim
Journal The Plant cell
Year 2002
DOI
10.1105/tpc.010362
URL
https://academic.oup.com/plcell/article-pdf/14/2/343/35424742/plcell_v14_2_343.pdf
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