数字农科院2.0

Construction of Two Suppression Subtractive Hybridization Libraries and Identification of Salt-Induced Genes in Soybean

文献类型： 外文期刊

作者： Li Liang;Wang Wei-qi;Wu Cun-xiang;Han Tian-fu;Hou Wen-sheng;Li Liang

作者机构：

关键词： salt stress;suppression subtractive hybridization (SSH);soybean

期刊名称： JOURNAL OF INTEGRATIVE AGRICULTURE

ISSN： 2095-3119

年卷期： 2012 年 11 卷 7 期

页码：

收录情况： SCI

摘要： Soybean is planted worldwide and its productivity is significantly hampered by salinity. Development of salt tolerant cultivars is necessary for promoting soybean production. Despite wealth of information generated on salt tolerance mechanism, its basics still remain elusive. A continued effort is needed to understand the salt tolerance mechanism in soybean using suitable molecular tools. To better understand the molecular basis of the responses of soybean to salt stress and to get an enrichment of critical salt stress responsive genes in soybean, suppression subtractive hybridization libraries (SSH) are constructed for the root tissue of two cultivated soybean genotypes, one was tolerant and the other was sensitive to salt stress. To compare the responses of plants in salt treatment and non-treatment, SSH I was constructed for the salt-tolerant cultivar Wenfeng 7 and SSH2 was constructed for the salt-sensitive cultivar Union. From the two SSH cDNA libraries, a total of 379 high quality ESTs were obtained. These ESTs were then annotated by performing sequence similarity searches against the NCBI nr (National Center for Biotechnology Information protein non-redundant) database using the BLASTX program. Sixty-three genes from SSH1 and 49 genes from SSH2 could be assigned putative function. On the other hand, 25 ESTs of SSH1 which may be not the salt tolerance-related genes were removed by comparing and analyzing the ESTs from the two SSH libraries, which increased the proportion of the genes related to salt tolerance in SSH1. These results suggested that the novel way could realize low background of SSH and high level enrichment of target cDNAs to some extent.

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