A putative plasma membrane cation/proton antiporter from soybean confers salt tolerance in Arabidopsis

Guang Zuo Luo, Hui Wen Wang, Jian Huang, Ai Guo Tian, Yongjun Wang, Jin Song Zhang, Shou Yi Chen

Research output: Contribution to journalArticle

61 Citations (Scopus)

Abstract

Cation transport is thought to be an important process for ion homeostasis in plant cells. Here, we report that a soybean putative cation/proton antiporter GmCAX1 may be a mediator of this process. GmCAX1 is expressed in all tissues of the soybean plants but at a lower level in roots. Its expression was induced by PEG, ABA, Ca 2+ , Na + and Li + treatments. The GmCAX1-GFP fusion protein was mainly localized in plasma membrane of the transgenic Arabidopsis plant cells and onion epidermal cells. Transgenic Arabidopsis plants overexpressing GmCAX1 accumulated less Na + , K + , and Li + , and were more tolerant to elevated Li + and Na + levels during germination when compared with the controls. These results suggest that GmCAX1 may function as an antiporter for Na + , K + and Li + . Modulation of this antiporter may be beneficial for regulation of ion homeostasis and thus plant salt tolerance.

Original languageEnglish (US)
Pages (from-to)809-820
Number of pages12
JournalPlant Molecular Biology
Volume59
Issue number5
DOIs
StatePublished - Nov 1 2005

Fingerprint

Antiporters
Salt-Tolerance
antiporters
Genetically Modified Plants
Plant Cells
salt tolerance
Soybeans
Arabidopsis
Cations
Protons
Homeostasis
plasma membrane
Cell Membrane
Ions
soybeans
Onions
Germination
homeostasis
genetically modified organisms
ions

Keywords

  • Antiporter
  • Soybean
  • Stress tolerance

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Genetics
  • Plant Science

Cite this

A putative plasma membrane cation/proton antiporter from soybean confers salt tolerance in Arabidopsis. / Luo, Guang Zuo; Wang, Hui Wen; Huang, Jian; Tian, Ai Guo; Wang, Yongjun; Zhang, Jin Song; Chen, Shou Yi.

In: Plant Molecular Biology, Vol. 59, No. 5, 01.11.2005, p. 809-820.

Research output: Contribution to journalArticle

Luo, Guang Zuo ; Wang, Hui Wen ; Huang, Jian ; Tian, Ai Guo ; Wang, Yongjun ; Zhang, Jin Song ; Chen, Shou Yi. / A putative plasma membrane cation/proton antiporter from soybean confers salt tolerance in Arabidopsis. In: Plant Molecular Biology. 2005 ; Vol. 59, No. 5. pp. 809-820.
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