An EREBP/AP2-type protein in Triticum aestivum was a DRE-binding transcription factor induced by cold, dehydration and ABA stress.

Y-G Shen, W-K Zhang, S-J He, J-S Zhang, Q Liu, S-Y Chen

Plant Biotechnology Laboratory, Institute of Genetics, Chinese Academy of Sciences, Beijing 100101, PR China.

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik 2003 Mar

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We characterize one transcription factor of DRE-binding proteins (TaDREB1) that was isolated from a drought-induced cDNA library of wheat (Triticum aestivum L.). TaDREB1 contains one conserved EREBP/AP2 domain, and shows similarity with Arabidopsis thaliana DREB family members in both overall amino-acid sequences and the secondary structure arrangement within the DNA-binding motifs. In yeast one-hybrid system, TaDREB1, can specially activate the genes fused with the promoter containing three tandemly repeated copies of the wild-type DRE sequence: TACCGACAT. In different wheat cultivars, the Ta DREB1 gene is induced by low temperature, salinity and drought; and the expression of Wcs120 that contains DRE motifs in its promoter is closely related to the expression of TaDREB1. These results suggest that TaDREB1 functions as a DRE-binding transcription factor in wheat. We also observed the dwarf phenotype in transgenic rice (T0) overexpressing TaDREB1.

Citation

Y-G Shen, W-K Zhang, S-J He, J-S Zhang, Q Liu, S-Y Chen. An EREBP/AP2-type protein in Triticum aestivum was a DRE-binding transcription factor induced by cold, dehydration and ABA stress. TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik. 2003 Mar;106(5):923-30