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Silicon-mediated Improvement in Plant Salinity Tolerance: The Role of Aquaporins

Silicon (Si) is an abundant and differentially distributed element in soils that is believed to have important biological functions. However, the benefits of Si and its essentiality in plants are controversial due to differences among species in their ability to take up this element. Despite this, t...

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Autores principales: Rios, Juan J., Martínez-Ballesta, Maria C., Ruiz, Juan M., Blasco, Begoña, Carvajal, Micaela
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5463179/
https://www.ncbi.nlm.nih.gov/pubmed/28642767
http://dx.doi.org/10.3389/fpls.2017.00948
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author Rios, Juan J.
Martínez-Ballesta, Maria C.
Ruiz, Juan M.
Blasco, Begoña
Carvajal, Micaela
author_facet Rios, Juan J.
Martínez-Ballesta, Maria C.
Ruiz, Juan M.
Blasco, Begoña
Carvajal, Micaela
author_sort Rios, Juan J.
collection PubMed
description Silicon (Si) is an abundant and differentially distributed element in soils that is believed to have important biological functions. However, the benefits of Si and its essentiality in plants are controversial due to differences among species in their ability to take up this element. Despite this, there is a consensus that the application of Si improves the water status of plants under abiotic stress conditions. Hence, plants treated with Si are able to maintain a high stomatal conductance and transpiration rate under salt stress, suggesting that a reduction in Na(+) uptake occurs due to deposition of Si in the root. In addition, root hydraulic conductivity increases when Si is applied. As a result, a Si-mediated upregulation of aquaporin (PIP) gene expression is observed in relation to increased root hydraulic conductivity and water uptake. Aquaporins of the subclass nodulin 26-like intrinsic proteins are further involved in allowing Si entry into the cell. Therefore, on the basis of available published results and recent developments, we propose a model to explain how Si absorption alleviates stress in plants grown under saline conditions through the conjugated action of different aquaporins.
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spelling pubmed-54631792017-06-22 Silicon-mediated Improvement in Plant Salinity Tolerance: The Role of Aquaporins Rios, Juan J. Martínez-Ballesta, Maria C. Ruiz, Juan M. Blasco, Begoña Carvajal, Micaela Front Plant Sci Plant Science Silicon (Si) is an abundant and differentially distributed element in soils that is believed to have important biological functions. However, the benefits of Si and its essentiality in plants are controversial due to differences among species in their ability to take up this element. Despite this, there is a consensus that the application of Si improves the water status of plants under abiotic stress conditions. Hence, plants treated with Si are able to maintain a high stomatal conductance and transpiration rate under salt stress, suggesting that a reduction in Na(+) uptake occurs due to deposition of Si in the root. In addition, root hydraulic conductivity increases when Si is applied. As a result, a Si-mediated upregulation of aquaporin (PIP) gene expression is observed in relation to increased root hydraulic conductivity and water uptake. Aquaporins of the subclass nodulin 26-like intrinsic proteins are further involved in allowing Si entry into the cell. Therefore, on the basis of available published results and recent developments, we propose a model to explain how Si absorption alleviates stress in plants grown under saline conditions through the conjugated action of different aquaporins. Frontiers Media S.A. 2017-06-08 /pmc/articles/PMC5463179/ /pubmed/28642767 http://dx.doi.org/10.3389/fpls.2017.00948 Text en Copyright © 2017 Rios, Martínez-Ballesta, Ruiz, Blasco and Carvajal. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Plant Science
Rios, Juan J.
Martínez-Ballesta, Maria C.
Ruiz, Juan M.
Blasco, Begoña
Carvajal, Micaela
Silicon-mediated Improvement in Plant Salinity Tolerance: The Role of Aquaporins
title Silicon-mediated Improvement in Plant Salinity Tolerance: The Role of Aquaporins
title_full Silicon-mediated Improvement in Plant Salinity Tolerance: The Role of Aquaporins
title_fullStr Silicon-mediated Improvement in Plant Salinity Tolerance: The Role of Aquaporins
title_full_unstemmed Silicon-mediated Improvement in Plant Salinity Tolerance: The Role of Aquaporins
title_short Silicon-mediated Improvement in Plant Salinity Tolerance: The Role of Aquaporins
title_sort silicon-mediated improvement in plant salinity tolerance: the role of aquaporins
topic Plant Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5463179/
https://www.ncbi.nlm.nih.gov/pubmed/28642767
http://dx.doi.org/10.3389/fpls.2017.00948
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