Plant salt tolerance and Na+ sensing and transport

Salinity is a global challenge to agricultural production. Understanding Na+ sensing and transport in plants under salt stress will be of benefit for breeding robustly salt-tolerant crop species. In this review, first, possible salt stress sensor candidates and the root meristem zone as a tissue har...

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Bibliographic Details
Published inThe Crop journal Vol. 6; no. 3; pp. 215 - 225
Main Author Wu, Honghong
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.06.2018
KeAi Communications Co., Ltd
Subjects
Channels
crops
cytosol
Na+ sensing
Na+ transport
phloem
plant breeding
Plant salt tolerance
root meristems
salinity
salt stress
salt tolerance
secretion
sodium
stress tolerance
Transporters
vacuoles
xylem
Transporters
Plant salt tolerance
Na+ sensing
Channels
Na+ transport
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Summary:Salinity is a global challenge to agricultural production. Understanding Na+ sensing and transport in plants under salt stress will be of benefit for breeding robustly salt-tolerant crop species. In this review, first, possible salt stress sensor candidates and the root meristem zone as a tissue harboring salt stress-sensing components are proposed. Then, the importance of Na+ exclusion and vacuolar Na+ sequestration in plant overall salt tolerance is highlighted. Other Na+ regulation processes, including xylem Na+ loading and unloading, phloem Na+ recirculation, and Na+ secretion, are discussed and summarized. Along with a summary of Na+ transporters and channels, the molecular regulation of Na+ transporters and channels in response to salt stress is discussed. Finally, some largely neglected issues in plant salt stress tolerance, including Na+ concentration in cytosol and the role of Na+ as a nutrient, are reviewed and discussed.
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ISSN:2214-5141
2214-5141
DOI:10.1016/j.cj.2018.01.003