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http://dx.doi.org/10.12972/kjhst.20160011

Characterization of a Drought-Tolerance Gene, BrDSR, in Chinese Cabbage  

Yu, Jae-Gyeong (Department of Horticultural Biotechnology, Kyunghee University)
Lee, Gi-Ho (Department of Horticultural Biotechnology, Kyunghee University)
Park, Young-Doo (Department of Horticultural Biotechnology, Kyunghee University)
Publication Information
Horticultural Science & Technology / v.34, no.1, 2016 , pp. 102-111 More about this Journal
Abstract
The goal of this study was to characterize the BrDSR (Drought Stress Resistance in B. rapa) gene and to identify the expression network of drought-inducible genes in Chinese cabbage under drought stress. Agrobacterium-mediated transformation was conducted using a B. rapa inbred line ('CT001') and the pSL100 vector containing the BrDSR full length CDS (438 bp open reading frame). Four transgenic plants were selected by PCR and the expression level of BrDSR was approximately 1.9-3.4-fold greater than that in the wild-type control under drought stress. Phenotypic characteristics showed that BrDSR over-expressing plants were resistant to drought stress and showed normal growth habit. To construct a co-expression network of drought-responsive genes, B. rapa 135K cDNA microarray data was analyzed to identify genes associated with BrDSR. BrDSR was directly linked to DARK INDUCIBLE 2 (DIN2, AT3G60140) and AUTOPHAGY 8H (ATG8H, AT3G06420) previously reported to be leaf senescence and autophagy-related genes in plants. Taken together, the results of this study indicated that BrDSR plays a significant role in enhancement of tolerance to drought conditions.
Keywords
cDNA chip; gene expression network; phenotypic characterization;
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