Journal
BIOLOGIA PLANTARUM
Volume 59, Issue 1, Pages 74-82Publisher
ACAD SCIENCES CZECH REPUBLIC, INST EXPERIMENTAL BOTANY
DOI: 10.1007/s10535-014-0467-9
Keywords
abiotic stress; abscisic acid; auxin; cytokinin; gibberelic acid; expression pattern; transcriptional regulation; transgenic plant
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Funding
- National Program on Key Basic Research Project (973 Program) [2014CB138701]
- National Natural Science Foundation of China [31372361]
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A new member of the APETALA2/ethylene responsive element binding protein (AP2/EREBP) transcription factor family, HhDREB2, was isolated from Halimodendron halodendron. Based on the similarity of the AP2/ERF domain, HhDREB2 was classified into A-5 group of the DREB subfamily. The expression of HhDREB2 gene was induced by drought, high salinity, and low temperature, but not by exogenous plant hormones. Trans-activity assay demonstrated that HhDREB2 gene encodes a transcription activator. Furthermore, over-expression of HhDREB2 gene under the stress-inducible rd29A promotor in Arabidopsis resulted in enhanced tolerance to salt and drought stresses. The overall results reveal that HhDREB2 functioned as important transcription factor in regulation of stress-responsive signaling in plants and may be used for improving plant tolerance to abiotic stresses.
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