Abstract
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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Abbreviations
- ABA:
-
abscisic acid
- BA:
-
6-benzylaminopurine
- CaMV:
-
cauliflower mosaic virus
- DREB:
-
dehydration responsive element binding
- GA3 :
-
gibberellic acid
- GFP:
-
green fluorescent protein
- MS:
-
Murashige and Skoog
- NAA:
-
1-naphthaleneacetic acid
- RACE:
-
rapid amplification of cDNA ends
- TBA:
-
thiobarbituric acid
- TCA:
-
trichloroacetic acid
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Acknowledgments: This work was supported by the National Program on Key Basic Research Project (973 Program) (Grant No. 2014CB138701) and the National Natural Science Foundation of China (Grant No. 31372361).
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Ma, J.T., Yin, C.C., Guo, Q.Q. et al. A novel DREB transcription factor from Halimodendron halodendron leads to enhance drought and salt tolerance in Arabidopsis . Biol Plant 59, 74–82 (2015). https://doi.org/10.1007/s10535-014-0467-9
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DOI: https://doi.org/10.1007/s10535-014-0467-9