Plant Salinity Stress: Many Unanswered Questions Remain

Salinity is a major threat to modern agriculture causing inhibition and impairment of crop growth and development. Here, we not only review recent advances in salinity stress research in plants but also revisit some basic perennial questions that still remain unanswered. In this review, we analyze t...

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Vydáno v:Frontiers in plant science Ročník 10; s. 80
Hlavní autoři: Isayenkov, Stanislav V., Maathuis, Frans J. M.
Médium: Journal Article
Jazyk:angličtina
Vydáno: Switzerland Frontiers Media SA 15.02.2019
Frontiers Media S.A
Témata:
Abiotic stress
Aquaporins
Chloride
Crop growth
Cytosol
Ion distribution
ion uptake
mechanisms of salt tolerance
membrane transporters
Physiology
Plant Science
Plasma
role of K
Salinity
Salinity effects
Salt
salt stress
Toxicity
transport of Na+ and Cl
transport of Na+ and Cl
ion uptake
membrane transporters
role of K
symplastic and apoplastic pathway
salt stress
mechanisms of salt tolerance
ISSN:1664-462X, 1664-462X
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Shrnutí:Salinity is a major threat to modern agriculture causing inhibition and impairment of crop growth and development. Here, we not only review recent advances in salinity stress research in plants but also revisit some basic perennial questions that still remain unanswered. In this review, we analyze the physiological, biochemical, and molecular aspects of Na and Cl uptake, sequestration, and transport associated with salinity. We discuss the role and importance of symplastic versus apoplastic pathways for ion uptake and critically evaluate the role of different types of membrane transporters in Na and Cl uptake and intercellular and intracellular ion distribution. Our incomplete knowledge regarding possible mechanisms of salinity sensing by plants is evaluated. Furthermore, a critical evaluation of the mechanisms of ion toxicity leads us to believe that, in contrast to currently held ideas, toxicity only plays a minor role in the cytosol and may be more prevalent in the vacuole. Lastly, the multiple roles of K in plant salinity stress are discussed.
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Edited by: Meixue Zhou, University of Tasmania, Australia
Reviewed by: Jayakumar Bose, University of Adelaide, Australia; Francisco Rubio, Centro de Edafología y Biología Aplicada del Segura (CEBAS), Spain
This article was submitted to Plant Abiotic Stress, a section of the journal Frontiers in Plant Science
ISSN:1664-462X
1664-462X
DOI:10.3389/fpls.2019.00080