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Root Silicon Addition Induces Fe Deficiency in Cucumber Plants, but Facilitates Their Recovery After Fe Resupply. A Comparison With Si Foliar Sprays

Silicon has not been cataloged as an essential element for higher plants. However, it has shown beneficial effects on many crops, especially under abiotic and biotic stresses. Silicon fertilization was evaluated for the first time on plants exposed to fluctuations in an Fe regime (Fe sufficiency fol...

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Autores principales: Hernández-Apaolaza, Lourdes, Escribano, Laura, Zamarreño, Ángel Mª, García-Mina, José Mª, Cano, Carlos, Carrasco-Gil, Sandra
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7793930/
https://www.ncbi.nlm.nih.gov/pubmed/33424881
http://dx.doi.org/10.3389/fpls.2020.580552
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author Hernández-Apaolaza, Lourdes
Escribano, Laura
Zamarreño, Ángel Mª
García-Mina, José Mª
Cano, Carlos
Carrasco-Gil, Sandra
author_facet Hernández-Apaolaza, Lourdes
Escribano, Laura
Zamarreño, Ángel Mª
García-Mina, José Mª
Cano, Carlos
Carrasco-Gil, Sandra
author_sort Hernández-Apaolaza, Lourdes
collection PubMed
description Silicon has not been cataloged as an essential element for higher plants. However, it has shown beneficial effects on many crops, especially under abiotic and biotic stresses. Silicon fertilization was evaluated for the first time on plants exposed to fluctuations in an Fe regime (Fe sufficiency followed by Fe deficiency and, in turn, by Fe resupply). Root and foliar Si applications were compared using cucumber plants that were hydroponically grown in a growth chamber under different Fe nutritional statuses and Si applied either to the roots or to the shoots. The SPAD index, Fe, and Mn concentration, ROS, total phenolic compounds, MDA concentration, phytohormone balance, and cell cycle were determined. The results obtained showed that the addition of Si to the roots induced an Fe shortage in plants grown under optimal or deficient Fe nutritional conditions, but this was not observed when Si was applied to the leaves. Plant recovery following Fe resupply was more effective in the Si-treated plants than in the untreated plants. A relationship between the ROS concentration, hormonal balance, and cell cycle under different Fe regimes and in the presence or absence of Si was also studied. The contribution of Si to this signaling pathway appears to be related more to the induction of Fe deficiency, than to any direct biochemical or metabolic processes. However, these roles could not be completely ruled out because several hormone differences could only be explained by the addition of Si.
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spelling pubmed-77939302021-01-09 Root Silicon Addition Induces Fe Deficiency in Cucumber Plants, but Facilitates Their Recovery After Fe Resupply. A Comparison With Si Foliar Sprays Hernández-Apaolaza, Lourdes Escribano, Laura Zamarreño, Ángel Mª García-Mina, José Mª Cano, Carlos Carrasco-Gil, Sandra Front Plant Sci Plant Science Silicon has not been cataloged as an essential element for higher plants. However, it has shown beneficial effects on many crops, especially under abiotic and biotic stresses. Silicon fertilization was evaluated for the first time on plants exposed to fluctuations in an Fe regime (Fe sufficiency followed by Fe deficiency and, in turn, by Fe resupply). Root and foliar Si applications were compared using cucumber plants that were hydroponically grown in a growth chamber under different Fe nutritional statuses and Si applied either to the roots or to the shoots. The SPAD index, Fe, and Mn concentration, ROS, total phenolic compounds, MDA concentration, phytohormone balance, and cell cycle were determined. The results obtained showed that the addition of Si to the roots induced an Fe shortage in plants grown under optimal or deficient Fe nutritional conditions, but this was not observed when Si was applied to the leaves. Plant recovery following Fe resupply was more effective in the Si-treated plants than in the untreated plants. A relationship between the ROS concentration, hormonal balance, and cell cycle under different Fe regimes and in the presence or absence of Si was also studied. The contribution of Si to this signaling pathway appears to be related more to the induction of Fe deficiency, than to any direct biochemical or metabolic processes. However, these roles could not be completely ruled out because several hormone differences could only be explained by the addition of Si. Frontiers Media S.A. 2020-12-10 /pmc/articles/PMC7793930/ /pubmed/33424881 http://dx.doi.org/10.3389/fpls.2020.580552 Text en Copyright © 2020 Hernández-Apaolaza, Escribano, Zamarreño, García-Mina, Cano and Carrasco-Gil. 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) and the copyright owner(s) 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
Hernández-Apaolaza, Lourdes
Escribano, Laura
Zamarreño, Ángel Mª
García-Mina, José Mª
Cano, Carlos
Carrasco-Gil, Sandra
Root Silicon Addition Induces Fe Deficiency in Cucumber Plants, but Facilitates Their Recovery After Fe Resupply. A Comparison With Si Foliar Sprays
title Root Silicon Addition Induces Fe Deficiency in Cucumber Plants, but Facilitates Their Recovery After Fe Resupply. A Comparison With Si Foliar Sprays
title_full Root Silicon Addition Induces Fe Deficiency in Cucumber Plants, but Facilitates Their Recovery After Fe Resupply. A Comparison With Si Foliar Sprays
title_fullStr Root Silicon Addition Induces Fe Deficiency in Cucumber Plants, but Facilitates Their Recovery After Fe Resupply. A Comparison With Si Foliar Sprays
title_full_unstemmed Root Silicon Addition Induces Fe Deficiency in Cucumber Plants, but Facilitates Their Recovery After Fe Resupply. A Comparison With Si Foliar Sprays
title_short Root Silicon Addition Induces Fe Deficiency in Cucumber Plants, but Facilitates Their Recovery After Fe Resupply. A Comparison With Si Foliar Sprays
title_sort root silicon addition induces fe deficiency in cucumber plants, but facilitates their recovery after fe resupply. a comparison with si foliar sprays
topic Plant Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7793930/
https://www.ncbi.nlm.nih.gov/pubmed/33424881
http://dx.doi.org/10.3389/fpls.2020.580552
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