Magnesium-induced alterations in the photosynthetic performance and resistance of rice plants infected with Bipolaris oryzae
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Scientia Agrícola (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000400328 |
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. |
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Magnesium-induced alterations in the photosynthetic performance and resistance of rice plants infected with Bipolaris oryzaeOryza sativafoliar diseasemacronutrientphotosynthesisplant nutritionBrown 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.Escola Superior de Agricultura "Luiz de Queiroz"2015-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000400328Scientia Agricola v.72 n.4 2015reponame:Scientia Agrícola (Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/0103-9016-2014-0312info:eu-repo/semantics/openAccessMoreira,Wiler RibasBispo,Wilka Messner da SilvaRios,Jonas AlbertoDebona,DanielNascimento,Clístenes Williams AraújoRodrigues,Fabrício Ávilaeng2015-06-10T00:00:00Zoai:scielo:S0103-90162015000400328Revistahttp://revistas.usp.br/sa/indexPUBhttps://old.scielo.br/oai/scielo-oai.phpscientia@usp.br||alleoni@usp.br1678-992X0103-9016opendoar:2015-06-10T00:00Scientia 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 Oryza sativa foliar disease macronutrient photosynthesis plant nutrition |
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 |
dc.subject.por.fl_str_mv |
Oryza sativa foliar disease macronutrient photosynthesis plant nutrition |
topic |
Oryza sativa foliar disease macronutrient photosynthesis plant nutrition |
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 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000400328 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000400328 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0103-9016-2014-0312 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Escola Superior de Agricultura "Luiz de Queiroz" |
publisher.none.fl_str_mv |
Escola Superior de Agricultura "Luiz de Queiroz" |
dc.source.none.fl_str_mv |
Scientia Agricola v.72 n.4 2015 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_ |
1748936463779627008 |