Isolation and functional characterization of salt-stress induced RCI2-like genes from Medicago sativa and Medicago truncatula

文献类型： 外文期刊

第一作者： Long, Ruicai

作者： Long, Ruicai;Zhang, Fan;Li, Zhenyi;Cong, Lili;Kang, Junmei;Zhang, Tiejun;Yang, Qingchuan;Li, Mingna;Sun, Yan;Zhao, Zhongxiang;Zhao, Zhongxiang

作者机构：

关键词： Complementation;Medicago;Overexpression;RCI2;Salt stress;Subcellular localization

期刊名称：JOURNAL OF PLANT RESEARCH （ 影响因子：2.629； 五年影响因子：2.926 ）

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收录情况： SCI

摘要： Salt stress is one of the most significant adverse abiotic factors, causing crop failure worldwide. So far, a number of salt stress-induced genes, and genes improving salt tolerance have been characterized in a range of plants. Here, we report the isolation and characterization of a salt stress-induced Medicago sativa (alfalfa) gene (MsRCI2A), which showed a high similarity to the yeast plasma membrane protein 3 gene (PMP3) and Arabidopsis RCI2A. The sequence comparisons revealed that five genes of MtRCI2(A-E) showed a high similarity to MsRCI2A in the Medicago truncatula genome. MsRCI2A and MtRCI2(A-E) encode small, highly hydrophobic proteins containing two putative transmembrane domains, predominantly localized in the plasma membrane. The transcript analysis results suggest that MsRCI2A and MtRCI2(A-D) genes are highly induced by salt stress. The expression of MsRCI2A and MtRCI2(A-C) in yeast mutants lacking the PMP3 gene can functionally complement the salt sensitivity phenotype resulting from PMP3 deletion. Overexpression of MsRCI2A in Arabidopsis plants showed improved salt tolerance suggesting the important role of MsRCI2A in salt stress tolerance in alfalfa.

分类号： Q94

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