Overexpression of a plasma membrane Na+/H+ antiporter gene improves salt tolerance in Arabidopsis thaliana

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质膜Na+/H+逆向转运蛋白基因的过表达提高拟南芥的耐盐性

关键词：

来源：

Nature Biotechnology

全文链接：

//agri.nais.net.cn/topic/downloadFile/30d28542-8dd0-4a15-895a-382b11bcebdc

来源地址：

资源所属：

种质资源保护与创制专题

类型：

学术文献

语种：

英语

原文发布日期：

2002-11-09

摘要：

High concentrations of Na+ in saline soils inhibit plant growth and reduce agricultural productivity. We report here that CaMV 35S promoter driven overexpression of the Arabidopsis thaliana SOS1 gene, which encodes a plasma membrane Na+/H+ antiporter, improves plant salt tolerance in A. thaliana. Transgenic plants showed substantial upregulation of SOS1 transcript levels upon NaCl treatment, suggesting post-transcriptional control of SOS1 transcript accumulation. In response to NaCl treatment, transgenic plants overexpressing SOS1 accumulated less Na+ in the xylem transpirational stream and in the shoot. Undifferentiated callus cultures regenerated from the transgenic plants were also more tolerant of salt stress, which was correlated with reduced Na+ content in the transgenic cells. These results show that improved salt tolerance could be achieved by limiting Na+ accumulation in plant cells.