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Characterization of two cDNAs for novel drought-inducible genes in the highly drought-tolerant cowpea

Characterization of two cDNAs for novel drought-inducible genes in the highly drought-tolerant cowpea

Journal of Plant Research 109(1096): 415-424

Ten cDNAs for drought-inducible genes were isolated using differential screening of a cDNA library prepared from 10-hr dehydrated cowpea plants, Vigna unguiculata (S. Iuchi, K Yamaguchi-Shinozaki, T. Urao, T. Terao, K. Shinozaki; Plant Cell Physiology, 1996 in press). Two of the cDNA clones, designated CPRD12 and CPRD46, were sequenced and characterized. The CPRD12 and CPRD46 cDNAs encode putative proteins related to nonmetallo short-chain alcohol dehydrogenase (CPRD12) and chloroplastic lipoxygenase (CPRD46). Northern blot analysis revealed that these genes are induced by high-salinity stress and exogenous abscisic acid, but not by cold stress. The CPRD46 gene is also responsive to heat stress and methyl jasmonate and salicylic acid. Genomic Southern blot analysis suggested that CPRD12 constitutes a small gene family, but that CPRD46 is a single copy gene. We discuss the possible functions of these two CPRD gene products under drought stress.

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Accession: 008303507

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DOI: 10.1007/bf02344557

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