The Sesuvium portulacastrum Plasma Membrane Na+/H+ Antiporter SpSOS1 Complemented the Salt Sensitivity of Transgenic Arabidopsis sos1 Mutant Plants
文献类型： 外文期刊
作者： Zhou, Yang 1 ; Yin, Xiaochang 2 ; Wan, Shumin 2 ; Hu, Yanping 3 ; Xie, Qing 2 ; Li, Ruimei 1 ; Zhu, Baibi 3 ; Fu, Shaopin 1 ;
作者机构： 1.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Key Lab Biol & Genet Resources Trop Crops, Minist Agr, Haikou 571101, Hainan, Peoples R China
2.Hainan Univ, Hainan Key Lab Biotechnol Salt Tolerant Crops, Inst Trop Agr & Forestry, Haikou 570228, Hainan, Peoples R China
3.Hainan Acad Agr Sci, Inst Vegetables, Haikou 571100, Hainan, Peoples R China
关键词： Arabidopsis thaliana; Na+/H+ antiporter; Plasma membrane; Salt tolerance; Sesuvium portulacastrum
期刊名称：PLANT MOLECULAR BIOLOGY REPORTER （ 影响因子：1.595； 五年影响因子：2.042 ）
ISSN： 0735-9640
年卷期： 2018 年 36 卷 4 期
页码：
收录情况： SCI
摘要： The plasma membrane (PM) Na+/H+ antiporter SOS1 (salt overly sensitive 1) has emerged as a key factor in regulating plant salt tolerance. The SpSOS1 gene, which encodes a PM Na+/H+ antiporter, was cloned from the halophyte Sesuvium portulacastrum and transformed into Arabidopsis sos1 mutant plants. As shown from the results, the SpSOS1 expression complemented the salt sensitivity of the sos1 mutant plants. Upon salinity stress, SpSOS1-transgenic Arabidopsis sos1 mutant seeds displayed higher germination ratio compared to the sos1 mutant. The sos1 mutant plants expressing SpSOS1 grew better and had a lower Na+/K+ ratio than that of the sos1 mutant and wild-type (WT) plants when they were treated with NaCl. In addition, SpSOS1-overexpressed Arabidopsis accumulated less malondialdehyde (MDA) and had a lower level of electrolyte leakage than that in the sos1 mutant and WT plants under salt stress. Furthermore, the SpSOS1 expression in transgenic sos1 mutant plants also increased the transcript levels of some salt stress-related genes, such as AtHKT1;1 (high-affinity K+ transporter 1;1), AtSOS2 (salt overly sensitive 2), AtSCABP8 (SOS3-like calcium binding protein 8), and AtNHX1 (Na+/H+ exchanger 1). These results suggested that SpSOS1 improved the plant salt tolerance by regulating ion homeostasis and protecting the plasma membrane against oxidative damage under salt stress.
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