Abstract:
:In higher plants, a cis-acting element, DRE/CRT, is involved in gene expression responsive to drought and low-temperature stress. To understand signal transduction pathways from the cold stress signal to gene expression, we characterized a gene family for DRE/CRT-binding proteins DREB1A and CBF1 in Arabidopsis thaliana. DREB1A and CBF1 were shown to be involved in low-temperature-responsive gene expression. We screened an Arabidopsis genomic DNA library with the cDNA fragment of DREB1A as a probe and isolated DREB1A and 2 related genes, DREB1B (= CBF1) and DREB1C. These were arrayed in the order B, A, C in an 8.7 kb region of Arabidopsis chromosome 4. Northern blot analysis using gene-specific probes showed that the 3 DREB1 genes are induced mainly by cold stress but not by osmotic stress in leaves, roots, and stems. Several conserved sequences were found in the promoter regions of all 3 genes. The beta-glucuronidase (GUS) reporter gene driven by the DREB1 promoters was induced at transcriptional level by low temperature in transgenic Arabidopsis plants.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Shinwari ZK,Nakashima K,Miura S,Kasuga M,Seki M,Yamaguchi-Shinozaki K,Shinozaki Kdoi
10.1006/bbrc.1998.9267subject
Has Abstractpub_date
1998-09-08 00:00:00pages
161-70issue
1eissn
0006-291Xissn
1090-2104pii
S0006-291X(98)99267-1journal_volume
250pub_type
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