Plant Molecular Biology Reporter

, Volume 36, Issue 4, pp 553–563 | Cite as

The Sesuvium portulacastrum Plasma Membrane Na+/H+ Antiporter SpSOS1 Complemented the Salt Sensitivity of Transgenic Arabidopsis sos1 Mutant Plants

  • Yang Zhou
  • Xiaochang Yin
  • Shumin Wan
  • Yanping Hu
  • Qing Xie
  • Ruimei Li
  • Baibi Zhu
  • Shaoping Fu
  • Jianchun GuoEmail author
  • Xingyu JiangEmail author
Original Paper


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.


Arabidopsis thaliana Na+/H+ antiporter Plasma membrane Salt tolerance Sesuvium portulacastrum 



We thank American Journal Experts (AJE) for the English language editing. This work was financially supported by the Natural Science Foundation of China (31660253, 31260218), the Fundamental Scientific Research Funds for Chinese Academy of Tropical Agricultural Sciences (No. CATAS-1630052014004), and the Scientific and Technological Foundation of Hainan Province (HNGDhs201502).

Supplementary material

11105_2018_1099_MOESM1_ESM.doc (37 kb)
Table S1 Primer sequences of the salt stress-related genes used in this study. (DOC 37 kb)


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Yang Zhou
    • 1
    • 2
  • Xiaochang Yin
    • 2
  • Shumin Wan
    • 2
  • Yanping Hu
    • 3
  • Qing Xie
    • 2
  • Ruimei Li
    • 1
  • Baibi Zhu
    • 3
  • Shaoping Fu
    • 1
  • Jianchun Guo
    • 1
    Email author
  • Xingyu Jiang
    • 2
    Email author
  1. 1.Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of AgricultureHaikouChina
  2. 2.Hainan Key Laboratory for Biotechnology of Salt Tolerant Crops/Institute of Tropical Agriculture and ForestryHainan UniversityHaikouChina
  3. 3.The Institute of VegetablesHainan Academy of Agricultural SciencesHaikouChina

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