Magnesium-induced alterations in the photosynthetic performance and resistance of rice plants infected with Bipolaris oryzae
Autor(a) principal: | |
---|---|
Data de Publicação: | 2015 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Scientia Agrícola (Online) |
Texto Completo: | https://www.revistas.usp.br/sa/article/view/100206 |
Resumo: | Brown spot (BS), caused by the fungus Bipolaris oryzae, is one of the most important diseases contracted by rice. We investigated the effect of magnesium (Mg) on the development of BS, caused by Bipolaris oryzae, and the effects of disease development on the photosynthetic performance of rice (Oryza sativa L.) plants (cv. Metica-1) grown in nutrient solutions containing 0.25 or 4.0 mM of Mg. Assessments of BS severity, leaf Mg and pigment concentrations (total chlorophylls and carotenoids), were carried out at 120 h after inoculation, in addition to gas exchange parameters,. Higher leaf concentration of Mg was observed in plants supplied with 4.0 mM Mg than in those supplied with 0.25 mM. The increase in leaf Mg was accompanied by a decrease in BS severity, higher concentration of total chlorophyll and better photosynthetic performance. Plants supplied with 4.0 mM Mg had higher average values for carbon assimilation, stomatal conductance and internal leaf CO2 concentration when compared with plants supplied with 0.25 mM Mg. Conversely, the concentration of carotenoids was lower in plants supplied with the higher Mg rate. These results suggest that Mg suppresses disease severity and preserves photosynthetic performance by allowing for better stomatal conductance and, consequently, greater availability of CO2 at the carboxylation sites. |
id |
USP-18_ece60b9671b9e71046e4b305ee50362d |
---|---|
oai_identifier_str |
oai:revistas.usp.br:article/100206 |
network_acronym_str |
USP-18 |
network_name_str |
Scientia Agrícola (Online) |
repository_id_str |
|
spelling |
Magnesium-induced alterations in the photosynthetic performance and resistance of rice plants infected with Bipolaris oryzae Brown spot (BS), caused by the fungus Bipolaris oryzae, is one of the most important diseases contracted by rice. We investigated the effect of magnesium (Mg) on the development of BS, caused by Bipolaris oryzae, and the effects of disease development on the photosynthetic performance of rice (Oryza sativa L.) plants (cv. Metica-1) grown in nutrient solutions containing 0.25 or 4.0 mM of Mg. Assessments of BS severity, leaf Mg and pigment concentrations (total chlorophylls and carotenoids), were carried out at 120 h after inoculation, in addition to gas exchange parameters,. Higher leaf concentration of Mg was observed in plants supplied with 4.0 mM Mg than in those supplied with 0.25 mM. The increase in leaf Mg was accompanied by a decrease in BS severity, higher concentration of total chlorophyll and better photosynthetic performance. Plants supplied with 4.0 mM Mg had higher average values for carbon assimilation, stomatal conductance and internal leaf CO2 concentration when compared with plants supplied with 0.25 mM Mg. Conversely, the concentration of carotenoids was lower in plants supplied with the higher Mg rate. These results suggest that Mg suppresses disease severity and preserves photosynthetic performance by allowing for better stomatal conductance and, consequently, greater availability of CO2 at the carboxylation sites. Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz2015-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.revistas.usp.br/sa/article/view/10020610.1590/0103-9016-2014-0312Scientia Agricola; v. 72 n. 4 (2015); 328-333Scientia Agricola; Vol. 72 Núm. 4 (2015); 328-333Scientia Agricola; Vol. 72 No. 4 (2015); 328-3331678-992X0103-9016reponame:Scientia Agrícola (Online)instname:Universidade de São Paulo (USP)instacron:USPenghttps://www.revistas.usp.br/sa/article/view/100206/98868Copyright (c) 2015 Scientia Agricolainfo:eu-repo/semantics/openAccessMoreira, Wiler Ribas Bispo, Wilka Messner da Silva Rios, Jonas Alberto Debona, Daniel Nascimento, Clístenes Williams Araújo Rodrigues, Fabrício Ávila 2015-08-31T12:45:45Zoai:revistas.usp.br:article/100206Revistahttp://revistas.usp.br/sa/indexPUBhttps://old.scielo.br/oai/scielo-oai.phpscientia@usp.br||alleoni@usp.br1678-992X0103-9016opendoar:2015-08-31T12:45:45Scientia Agrícola (Online) - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
Magnesium-induced alterations in the photosynthetic performance and resistance of rice plants infected with Bipolaris oryzae |
title |
Magnesium-induced alterations in the photosynthetic performance and resistance of rice plants infected with Bipolaris oryzae |
spellingShingle |
Magnesium-induced alterations in the photosynthetic performance and resistance of rice plants infected with Bipolaris oryzae Moreira, Wiler Ribas |
title_short |
Magnesium-induced alterations in the photosynthetic performance and resistance of rice plants infected with Bipolaris oryzae |
title_full |
Magnesium-induced alterations in the photosynthetic performance and resistance of rice plants infected with Bipolaris oryzae |
title_fullStr |
Magnesium-induced alterations in the photosynthetic performance and resistance of rice plants infected with Bipolaris oryzae |
title_full_unstemmed |
Magnesium-induced alterations in the photosynthetic performance and resistance of rice plants infected with Bipolaris oryzae |
title_sort |
Magnesium-induced alterations in the photosynthetic performance and resistance of rice plants infected with Bipolaris oryzae |
author |
Moreira, Wiler Ribas |
author_facet |
Moreira, Wiler Ribas Bispo, Wilka Messner da Silva Rios, Jonas Alberto Debona, Daniel Nascimento, Clístenes Williams Araújo Rodrigues, Fabrício Ávila |
author_role |
author |
author2 |
Bispo, Wilka Messner da Silva Rios, Jonas Alberto Debona, Daniel Nascimento, Clístenes Williams Araújo Rodrigues, Fabrício Ávila |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Moreira, Wiler Ribas Bispo, Wilka Messner da Silva Rios, Jonas Alberto Debona, Daniel Nascimento, Clístenes Williams Araújo Rodrigues, Fabrício Ávila |
description |
Brown spot (BS), caused by the fungus Bipolaris oryzae, is one of the most important diseases contracted by rice. We investigated the effect of magnesium (Mg) on the development of BS, caused by Bipolaris oryzae, and the effects of disease development on the photosynthetic performance of rice (Oryza sativa L.) plants (cv. Metica-1) grown in nutrient solutions containing 0.25 or 4.0 mM of Mg. Assessments of BS severity, leaf Mg and pigment concentrations (total chlorophylls and carotenoids), were carried out at 120 h after inoculation, in addition to gas exchange parameters,. Higher leaf concentration of Mg was observed in plants supplied with 4.0 mM Mg than in those supplied with 0.25 mM. The increase in leaf Mg was accompanied by a decrease in BS severity, higher concentration of total chlorophyll and better photosynthetic performance. Plants supplied with 4.0 mM Mg had higher average values for carbon assimilation, stomatal conductance and internal leaf CO2 concentration when compared with plants supplied with 0.25 mM Mg. Conversely, the concentration of carotenoids was lower in plants supplied with the higher Mg rate. These results suggest that Mg suppresses disease severity and preserves photosynthetic performance by allowing for better stomatal conductance and, consequently, greater availability of CO2 at the carboxylation sites. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-08-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://www.revistas.usp.br/sa/article/view/100206 10.1590/0103-9016-2014-0312 |
url |
https://www.revistas.usp.br/sa/article/view/100206 |
identifier_str_mv |
10.1590/0103-9016-2014-0312 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://www.revistas.usp.br/sa/article/view/100206/98868 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2015 Scientia Agricola info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2015 Scientia Agricola |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz |
publisher.none.fl_str_mv |
Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz |
dc.source.none.fl_str_mv |
Scientia Agricola; v. 72 n. 4 (2015); 328-333 Scientia Agricola; Vol. 72 Núm. 4 (2015); 328-333 Scientia Agricola; Vol. 72 No. 4 (2015); 328-333 1678-992X 0103-9016 reponame:Scientia Agrícola (Online) instname:Universidade de São Paulo (USP) instacron:USP |
instname_str |
Universidade de São Paulo (USP) |
instacron_str |
USP |
institution |
USP |
reponame_str |
Scientia Agrícola (Online) |
collection |
Scientia Agrícola (Online) |
repository.name.fl_str_mv |
Scientia Agrícola (Online) - Universidade de São Paulo (USP) |
repository.mail.fl_str_mv |
scientia@usp.br||alleoni@usp.br |
_version_ |
1800222792474427392 |