Effect of sodium chloride on the expression of genes involved in the salt tolerance of Bacillus sp. strain "SX4" isolated from salinized greenhouse soil

文献类型： 外文期刊

第一作者： Zhang, Jian

作者： Zhang, Jian;Guo, Tingting;Wang, Pengcheng;Zhang, Jian;Wang, Pengcheng;Xiao, Qingqing;Guo, Tingting

作者机构：

关键词： bacteria; chemicals; gene expression; facility soil; salt resistance

期刊名称：OPEN CHEMISTRY （ 影响因子：1.554； 五年影响因子：1.8 ）

ISSN： 2391-5420

年卷期： 2021 年 19 卷 1 期

页码：

收录情况： SCI

摘要： Salt stress is one of the important adverse conditions affecting bacterium growth. How bacteria isolated from greenhouse soil cope with salt stress and regulate the genes responsible for salt tolerance are still unclear. We conducted RNA transcriptome profiling of genes contributing to the salt tolerance of a Bacillus sp. strain ("SX4") obtained from salinized soil. Results showed that NaCl effectively regulated the growth of "SX4" in terms of cell length and colony-forming unit number decrease. A total of 121 upregulated and 346 downregulated genes were detected under salt stress with reference to the control. The largest numbers of differential expression genes were 17 in carbon metabolism, 13 in the biosynthesis of amino acids, 10 in a two-component system, and 10 in ABC transporter pathways for adapting to salt stress. Our data revealed that cation, electron and transmembrane transport, and catalytic activity play important roles in the resistance of bacterial cells to salt ions. Single-nucleotide polymorphism and the mutation of base pair T:A to C:G play potential roles in the adaptation of "SX4" to high NaCl concentrations. The findings from this study provide new insights into the molecular mechanisms of strain "SX4" and will be helpful in promoting the application of salt-tolerant bacteria.

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