Magnesium decreases leaf scald symptoms on rice leaves and preserves their photosynthetic performance
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | LOCUS Repositório Institucional da UFV |
Texto Completo: | https://doi.org/10.1016/j.plaphy.2016.07.002 http://www.locus.ufv.br/handle/123456789/12644 |
Resumo: | The aim of this study was to investigate the effect of magnesium (Mg) on the photosynthetic gas exchange parameters ([net CO2 assimilation rate (A), stomatal conductance (gs), and internal CO2 concentration (Ci)], chlorophyll (Chl) fluorescence a parameters {minimal fluorescence (F0), maximum fluorescence (Fm), maximum quantum yield of photosystem II (Fv/Fm), photochemical quenching coefficient (qp), yield of photochemistry [Y(II)], yield of regulated energy dissipation [Y(NPQ)] and yield of non-regulated dissipation losses [Y(NO)]} as well as on the concentrations of chloroplastidic pigments in rice plants grown in a nutrient solution containing 0.5 or 1.5 mM of Mg (-Mg or + Mg plants, respectively) and non-inoculated or inoculated with Monographella albescens. A higher Mg supply decreased the leaf scald symptoms in addition to partially preserving the photosynthetic performance of rice leaves challenged with M. albescens. Photosynthetic impairments were associated with photochemical and biochemical dysfunctions at the chloroplast level. The images of Chl a fluorescence evidenced increases in both the Y(II) and qp coupled with decreases in Y(NPQ) associated with a higher Mg supply regardless of inoculation, suggesting increased electron transport rates and lower energy dissipation as heat. Notably, as the leaf scald developed, the use of light energy through photochemical reactions was continuously lost, especially for the inoculated -Mg plants. Interestingly, the lower values for F0, Fm, and Fv/Fm for -Mg plants were associated with greater photochemical dysfunctions and a progressive loss of photosynthetic pigments during the infection process of M. albescens. The underlying mechanism through which Mg can affect rice resistance against M. albescens remains to be fully elucidated. |
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Magnesium decreases leaf scald symptoms on rice leaves and preserves their photosynthetic performanceChlorophyll a fluorescenceGas exchangeLeaf scaldPlant nutritionThe aim of this study was to investigate the effect of magnesium (Mg) on the photosynthetic gas exchange parameters ([net CO2 assimilation rate (A), stomatal conductance (gs), and internal CO2 concentration (Ci)], chlorophyll (Chl) fluorescence a parameters {minimal fluorescence (F0), maximum fluorescence (Fm), maximum quantum yield of photosystem II (Fv/Fm), photochemical quenching coefficient (qp), yield of photochemistry [Y(II)], yield of regulated energy dissipation [Y(NPQ)] and yield of non-regulated dissipation losses [Y(NO)]} as well as on the concentrations of chloroplastidic pigments in rice plants grown in a nutrient solution containing 0.5 or 1.5 mM of Mg (-Mg or + Mg plants, respectively) and non-inoculated or inoculated with Monographella albescens. A higher Mg supply decreased the leaf scald symptoms in addition to partially preserving the photosynthetic performance of rice leaves challenged with M. albescens. Photosynthetic impairments were associated with photochemical and biochemical dysfunctions at the chloroplast level. The images of Chl a fluorescence evidenced increases in both the Y(II) and qp coupled with decreases in Y(NPQ) associated with a higher Mg supply regardless of inoculation, suggesting increased electron transport rates and lower energy dissipation as heat. Notably, as the leaf scald developed, the use of light energy through photochemical reactions was continuously lost, especially for the inoculated -Mg plants. Interestingly, the lower values for F0, Fm, and Fv/Fm for -Mg plants were associated with greater photochemical dysfunctions and a progressive loss of photosynthetic pigments during the infection process of M. albescens. The underlying mechanism through which Mg can affect rice resistance against M. albescens remains to be fully elucidated.Plant Physiology and Biochemistry2017-10-31T17:00:33Z2017-10-31T17:00:33Z2016-07-04info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlepdfapplication/pdf0981-9428https://doi.org/10.1016/j.plaphy.2016.07.002http://www.locus.ufv.br/handle/123456789/12644engVolume 108, Pages 49-56, November 2016Elsevier Masson SASinfo:eu-repo/semantics/openAccessTatagiba, S.D.DaMatta, F.M.Rodrigues, F.A.reponame:LOCUS Repositório Institucional da UFVinstname:Universidade Federal de Viçosa (UFV)instacron:UFV2024-07-12T07:56:10Zoai:locus.ufv.br:123456789/12644Repositório InstitucionalPUBhttps://www.locus.ufv.br/oai/requestfabiojreis@ufv.bropendoar:21452024-07-12T07:56:10LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV)false |
dc.title.none.fl_str_mv |
Magnesium decreases leaf scald symptoms on rice leaves and preserves their photosynthetic performance |
title |
Magnesium decreases leaf scald symptoms on rice leaves and preserves their photosynthetic performance |
spellingShingle |
Magnesium decreases leaf scald symptoms on rice leaves and preserves their photosynthetic performance Tatagiba, S.D. Chlorophyll a fluorescence Gas exchange Leaf scald Plant nutrition |
title_short |
Magnesium decreases leaf scald symptoms on rice leaves and preserves their photosynthetic performance |
title_full |
Magnesium decreases leaf scald symptoms on rice leaves and preserves their photosynthetic performance |
title_fullStr |
Magnesium decreases leaf scald symptoms on rice leaves and preserves their photosynthetic performance |
title_full_unstemmed |
Magnesium decreases leaf scald symptoms on rice leaves and preserves their photosynthetic performance |
title_sort |
Magnesium decreases leaf scald symptoms on rice leaves and preserves their photosynthetic performance |
author |
Tatagiba, S.D. |
author_facet |
Tatagiba, S.D. DaMatta, F.M. Rodrigues, F.A. |
author_role |
author |
author2 |
DaMatta, F.M. Rodrigues, F.A. |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Tatagiba, S.D. DaMatta, F.M. Rodrigues, F.A. |
dc.subject.por.fl_str_mv |
Chlorophyll a fluorescence Gas exchange Leaf scald Plant nutrition |
topic |
Chlorophyll a fluorescence Gas exchange Leaf scald Plant nutrition |
description |
The aim of this study was to investigate the effect of magnesium (Mg) on the photosynthetic gas exchange parameters ([net CO2 assimilation rate (A), stomatal conductance (gs), and internal CO2 concentration (Ci)], chlorophyll (Chl) fluorescence a parameters {minimal fluorescence (F0), maximum fluorescence (Fm), maximum quantum yield of photosystem II (Fv/Fm), photochemical quenching coefficient (qp), yield of photochemistry [Y(II)], yield of regulated energy dissipation [Y(NPQ)] and yield of non-regulated dissipation losses [Y(NO)]} as well as on the concentrations of chloroplastidic pigments in rice plants grown in a nutrient solution containing 0.5 or 1.5 mM of Mg (-Mg or + Mg plants, respectively) and non-inoculated or inoculated with Monographella albescens. A higher Mg supply decreased the leaf scald symptoms in addition to partially preserving the photosynthetic performance of rice leaves challenged with M. albescens. Photosynthetic impairments were associated with photochemical and biochemical dysfunctions at the chloroplast level. The images of Chl a fluorescence evidenced increases in both the Y(II) and qp coupled with decreases in Y(NPQ) associated with a higher Mg supply regardless of inoculation, suggesting increased electron transport rates and lower energy dissipation as heat. Notably, as the leaf scald developed, the use of light energy through photochemical reactions was continuously lost, especially for the inoculated -Mg plants. Interestingly, the lower values for F0, Fm, and Fv/Fm for -Mg plants were associated with greater photochemical dysfunctions and a progressive loss of photosynthetic pigments during the infection process of M. albescens. The underlying mechanism through which Mg can affect rice resistance against M. albescens remains to be fully elucidated. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-07-04 2017-10-31T17:00:33Z 2017-10-31T17:00:33Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
0981-9428 https://doi.org/10.1016/j.plaphy.2016.07.002 http://www.locus.ufv.br/handle/123456789/12644 |
identifier_str_mv |
0981-9428 |
url |
https://doi.org/10.1016/j.plaphy.2016.07.002 http://www.locus.ufv.br/handle/123456789/12644 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Volume 108, Pages 49-56, November 2016 |
dc.rights.driver.fl_str_mv |
Elsevier Masson SAS info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Elsevier Masson SAS |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
pdf application/pdf |
dc.publisher.none.fl_str_mv |
Plant Physiology and Biochemistry |
publisher.none.fl_str_mv |
Plant Physiology and Biochemistry |
dc.source.none.fl_str_mv |
reponame:LOCUS Repositório Institucional da UFV instname:Universidade Federal de Viçosa (UFV) instacron:UFV |
instname_str |
Universidade Federal de Viçosa (UFV) |
instacron_str |
UFV |
institution |
UFV |
reponame_str |
LOCUS Repositório Institucional da UFV |
collection |
LOCUS Repositório Institucional da UFV |
repository.name.fl_str_mv |
LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV) |
repository.mail.fl_str_mv |
fabiojreis@ufv.br |
_version_ |
1817559973226348544 |