Journal
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
Volume 378, Issue 3, Pages 483-487Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.bbrc.2008.11.071
Keywords
Populus euphratica; DREB transcription factor; Abiotic stress; High-salt stress; Transgenic tobacco
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Funding
- National Natural Science Foundation of China [30571472, 30730077]
- Program for New Century Excellent Talents in University of MOD (2007)
- 948 project of the State Forestry Administration of China (2007-4-01)
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A novel DREB (dehydration responsive element binding) gene, designated PeDREB2, was isolated from the desert-grown tree, Populus euphratica. Based on multiple sequence alignment and phylogenetic characterization, PeDREB2 was classified as an A-2 group member of the DREB family. Expression of PeDREB2 was induced by cold, drought, and high salinity, but not by abscisic acid (ABA) treatment. PeDREB2 could bind specifically to DRE elements and was targeted to the nucleus when transiently expressed in onion epidermis cells. 35S promoter-driven expression of PeDREB2 improved salt tolerance in transgenic tobacco and did not cause growth retardation. The results indicate that PeDREB2 functions as a novel transcription factor involved in the response of salt stress and might be useful in improving salt tolerance in transgenic plants. (C) 2008 Elsevier Inc. All rights reserved.
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