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Publication Type J
Authors Shen, Y. G., W. K. Zhang, D. Q. Yan, B. X. Du, J. S. Zhang, Q. Liu and S. Y. Chen
Title Characterization of a DRE-binding transcription factor from a halophyte Atriplex hortensis
Source Theoretical and Applied Genetics
Abstract Environmental stresses, such as salinity, drought and cold, can induce the expression of a large amount of genes. Among these are many transcription factors that regulate the expression of downstream genes by specifically binding to cis-elements or forming transcriptional complexes with other proteins. In the present study, a DREB-like transcription factor gene, named AhDREB1, was isolated from a halophyte Atriplex hortensis. AhDREB1 encoded a protein containing a conserved EREBP/AP2 domain featuring the DREB family. In yeast one-hybrid analysis AhDREB1 protein was specifically bound to DRE elements and activated the expression of the reporter genes of HIS3 and LacZ. The AhDREB1 gene was expressed in roots, stems and leaves of A. hortensis. Salinity induced its expression in roots, but not in other organs. Overexpression of AhDREB1 in transgenic tobacco led to the accumulation of its putative downstream genes. The performance of the transgenic lines was also tested under stressed conditions and two lines were found to be stress-tolerant. These results suggest that the AhDREB1 protein functions as a DRE-binding transcription factor and play roles in the stress-tolerant response of A. hortensis.
Author Address Chinese Acad Sci, Inst Genet & Dev Biol, Plant Biotechnol Lab, Beijing 100101, Peoples R China. Tsing Hua Univ, Dept Biol Sci & Biotechnol, Beijing 100084, Peoples R China. Chen, SY (reprint author), Chinese Acad Sci, Inst Genet & Dev Biol, Plant Biotechnol Lab, Beijing 100101, Peoples R China.
ISSN 0040-5752
ISBN 0040-5752
Publication Date Jun
Year Published 2003
Volume 107
Issue 1
Beginning Page 155-161
Digital Object Identifier (DOI) 10.1007/s00122-003-1226-z
Unique Article Identifier WOS:000183831800020
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