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The cotton WRKY transcription factor (GhWRKY33) reduces transgenic Arabidopsis resistance to drought stress
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The cotton WRKY transcription factor (GhWRKY33) reduces transgenic Arabidopsis resistance to drought stress
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Journal Article
The cotton WRKY transcription factor (GhWRKY33) reduces transgenic Arabidopsis resistance to drought stress
2019
Overview
As the important source of natural fibers in the textile industry, cotton fiber quality and yield are often restricted to drought conditions because most of cotton plants in the world grow in the regions with water shortage. WRKY transcription factors regulate multiple plant physiological processes, including drought stress response. However, little is known of how the WRKY genes respond to drought stress in cotton. Our previous study revealed
GhWRKY33
is leaf-specific and induced by drought stress. In this study, our data showed GhWRKY33 protein localizes to the cell nucleus and is able to bind to “W-box” cis-acting elements of the target promoters. Under drought stress,
GhWRKY33
overexpressing transgenic Arabidopsis was withered much more quickly than wild type due to faster water loss. Moreover,
GhWRKY33
transgenic plants displayed more tolerance to abscisic acid (ABA), relative to wild type. Expression of some drought stress-related genes and ABA-responsive genes were changed in the
GhWRKY33
transgenic Arabidopsis with drought or ABA treatment. Collectively, our findings indicate that GhWRKY33 may act as a negative regulator to mediate plant response to drought stress and to participate in the ABA signaling pathway.
