Leaf gas exchange and chlorophyll a fluorescence imaging of soybean leaves Infected with Colletotrichum truncatum

Detalhes bibliográficos
Autor(a) principal: Dias, Carla da Silva
Data de Publicação: 2015
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: LOCUS Repositório Institucional da UFV
Texto Completo: http://www.locus.ufv.br/handle/123456789/7555
Resumo: Anthracnose, caused by Colletotrichum truncatum, is one of the most important soybean diseases worldwide. However, there are no studies evaluating the physiological changes affecting this pathossystem. Therefore, one approach to evaluating events that occur at the site of infection and near the infected area on the leaf, over time, will contribute to a better understanding of the host-plant interaction and photosynthetic activity. The present study aimed to investigate chlorophyll a fluorescence parameters at injured and adjacent areas and the related changes in gas exchange and evaluation of photosynthetic pigments in soybean plants inoculated or non-inoculated with C. truncatum. There were no significant differences regarding gas exchange parameters for inoculated plants. However, there was a reduction in the concentration of Chl a, Chl b e Chl total (a + b) of inoculated plants in the 72 and 144 hours after inoculation (hai). Reduction in chlorophyll a fluorescence parameters to as initial fluorescence (Fo), maximal fluorescence (Fm), maximal photosystem II quantum yield (Fv/ Fm), quantum yield of regulated energy dissipation Y (NPQ) and coefficient non-photochemical (qN), and an increase in the Effective PSII quantum yield Y (II), quantum yield of non- regulated energy dissipation (NO) and photochemical coefficient (qP) in the symptomatic area plants inoculated. However, these parameters have undergone minor adjacent areas of inoculated plants, differing only in a few days. Demonstrating a smaller effect of the pathogen in adjacent.
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spelling Leaf gas exchange and chlorophyll a fluorescence imaging of soybean leaves Infected with Colletotrichum truncatumTrocas gasosas e fluorescência da clorofila a em plantas de soja infectadas por Colletotrichum truncatumSojaGlycine maxFotossíntesseFluorescênciaClorofilaColletotrichum truncatumInteração planta-patógenoFisiologia VegetalAnthracnose, caused by Colletotrichum truncatum, is one of the most important soybean diseases worldwide. However, there are no studies evaluating the physiological changes affecting this pathossystem. Therefore, one approach to evaluating events that occur at the site of infection and near the infected area on the leaf, over time, will contribute to a better understanding of the host-plant interaction and photosynthetic activity. The present study aimed to investigate chlorophyll a fluorescence parameters at injured and adjacent areas and the related changes in gas exchange and evaluation of photosynthetic pigments in soybean plants inoculated or non-inoculated with C. truncatum. There were no significant differences regarding gas exchange parameters for inoculated plants. However, there was a reduction in the concentration of Chl a, Chl b e Chl total (a + b) of inoculated plants in the 72 and 144 hours after inoculation (hai). Reduction in chlorophyll a fluorescence parameters to as initial fluorescence (Fo), maximal fluorescence (Fm), maximal photosystem II quantum yield (Fv/ Fm), quantum yield of regulated energy dissipation Y (NPQ) and coefficient non-photochemical (qN), and an increase in the Effective PSII quantum yield Y (II), quantum yield of non- regulated energy dissipation (NO) and photochemical coefficient (qP) in the symptomatic area plants inoculated. However, these parameters have undergone minor adjacent areas of inoculated plants, differing only in a few days. Demonstrating a smaller effect of the pathogen in adjacent.A Anthracnose, causada pelo fungo Colletotrichum truncatum, é uma das doenças de soja mais importantes no mundo, mas não há estudos avaliando as alterações fisiológicas neste patossistema. Portanto, uma abordagem para avaliar os eventos que ocorrem no local da infecção e perto da área infectada na folha, ao longo do tempo, contribuirá para uma melhor compreensão da interação planta-hospedeiro e atividade fotossintética. Assim, o presente estudo buscou investigar parâmetros de fluorescência da clorofila a (Chl a) na área da lesão e uma área adjacente, associando os ás trocas gasosas e avaliação de pigmentos fotossintéticos em plantas de soja inoculadas ou não inoculadas com C. truncatum. O parâmetros de trocas gasosas não foram alterados em plantas inoculadas. No entanto, ocorreu redução da concentração de Chl a, Ch b e da Chl total (a + b) nas plantas inoculadas as 72 e 144 horas após a inoculação (hai), com redução máxima à 144 hai de 24% para Chl a, que demonstrou ser mais sensível que a Chl b, ocasionando, portanto, a redução da razão Chl a/ Chl b. Também foi encontrado queda em valores de fluorescência da clorofila a como, Fluorescência inicial (Fo), Fluorescência máxima (Fm), Eficiencia quântica máxima do fotossistema II (Fv/Fm), Rendimento quântico de dissipação de energia regulada Y(NPQ) e coeficiente não- fotoquímico (qN), e um acréscimo no Rendimento quântico efetivo do PSII Y(II), Rendimento quântico de dissipação de energia não regulada (NO) e coeficiente fotoquímico (qP) nas área sintomática de plantas inoculadas. Entretanto esses parâmetros sofreram pequenas alterações nas áreas adjacentes das plantas inoculadas, diferindo apenas em alguns tempos. Demonstrando, dessa forma, um menor efeito do patógeno nas áreas adjacentes.Fundação de Amparo à Pesquisa do Estado de Minas GeraisUniversidade Federal de ViçosaRodrigues, Fabrício de Ávilahttp://lattes.cnpq.br/0497776503129914Dias, Carla da Silva2016-04-26T11:31:40Z2016-04-26T11:31:40Z2015-02-19info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfDIAS, Carla da Silva. Leaf gas eExchange and chlorophyll a fluorescence imaging of soybean leaves infected with Colletotrichum truncatum. 2015. 26f. Dissertação (Mestrado em Fisiologia Vegetal) - Universidade Federal de Viçosa, Viçosa. 2015.http://www.locus.ufv.br/handle/123456789/7555enginfo:eu-repo/semantics/openAccessreponame:LOCUS Repositório Institucional da UFVinstname:Universidade Federal de Viçosa (UFV)instacron:UFV2016-04-27T10:02:49Zoai:locus.ufv.br:123456789/7555Repositório InstitucionalPUBhttps://www.locus.ufv.br/oai/requestfabiojreis@ufv.bropendoar:21452016-04-27T10:02:49LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV)false
dc.title.none.fl_str_mv Leaf gas exchange and chlorophyll a fluorescence imaging of soybean leaves Infected with Colletotrichum truncatum
Trocas gasosas e fluorescência da clorofila a em plantas de soja infectadas por Colletotrichum truncatum
title Leaf gas exchange and chlorophyll a fluorescence imaging of soybean leaves Infected with Colletotrichum truncatum
spellingShingle Leaf gas exchange and chlorophyll a fluorescence imaging of soybean leaves Infected with Colletotrichum truncatum
Dias, Carla da Silva
Soja
Glycine max
Fotossíntesse
Fluorescência
Clorofila
Colletotrichum truncatum
Interação planta-patógeno
Fisiologia Vegetal
title_short Leaf gas exchange and chlorophyll a fluorescence imaging of soybean leaves Infected with Colletotrichum truncatum
title_full Leaf gas exchange and chlorophyll a fluorescence imaging of soybean leaves Infected with Colletotrichum truncatum
title_fullStr Leaf gas exchange and chlorophyll a fluorescence imaging of soybean leaves Infected with Colletotrichum truncatum
title_full_unstemmed Leaf gas exchange and chlorophyll a fluorescence imaging of soybean leaves Infected with Colletotrichum truncatum
title_sort Leaf gas exchange and chlorophyll a fluorescence imaging of soybean leaves Infected with Colletotrichum truncatum
author Dias, Carla da Silva
author_facet Dias, Carla da Silva
author_role author
dc.contributor.none.fl_str_mv Rodrigues, Fabrício de Ávila
http://lattes.cnpq.br/0497776503129914
dc.contributor.author.fl_str_mv Dias, Carla da Silva
dc.subject.por.fl_str_mv Soja
Glycine max
Fotossíntesse
Fluorescência
Clorofila
Colletotrichum truncatum
Interação planta-patógeno
Fisiologia Vegetal
topic Soja
Glycine max
Fotossíntesse
Fluorescência
Clorofila
Colletotrichum truncatum
Interação planta-patógeno
Fisiologia Vegetal
description Anthracnose, caused by Colletotrichum truncatum, is one of the most important soybean diseases worldwide. However, there are no studies evaluating the physiological changes affecting this pathossystem. Therefore, one approach to evaluating events that occur at the site of infection and near the infected area on the leaf, over time, will contribute to a better understanding of the host-plant interaction and photosynthetic activity. The present study aimed to investigate chlorophyll a fluorescence parameters at injured and adjacent areas and the related changes in gas exchange and evaluation of photosynthetic pigments in soybean plants inoculated or non-inoculated with C. truncatum. There were no significant differences regarding gas exchange parameters for inoculated plants. However, there was a reduction in the concentration of Chl a, Chl b e Chl total (a + b) of inoculated plants in the 72 and 144 hours after inoculation (hai). Reduction in chlorophyll a fluorescence parameters to as initial fluorescence (Fo), maximal fluorescence (Fm), maximal photosystem II quantum yield (Fv/ Fm), quantum yield of regulated energy dissipation Y (NPQ) and coefficient non-photochemical (qN), and an increase in the Effective PSII quantum yield Y (II), quantum yield of non- regulated energy dissipation (NO) and photochemical coefficient (qP) in the symptomatic area plants inoculated. However, these parameters have undergone minor adjacent areas of inoculated plants, differing only in a few days. Demonstrating a smaller effect of the pathogen in adjacent.
publishDate 2015
dc.date.none.fl_str_mv 2015-02-19
2016-04-26T11:31:40Z
2016-04-26T11:31:40Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv DIAS, Carla da Silva. Leaf gas eExchange and chlorophyll a fluorescence imaging of soybean leaves infected with Colletotrichum truncatum. 2015. 26f. Dissertação (Mestrado em Fisiologia Vegetal) - Universidade Federal de Viçosa, Viçosa. 2015.
http://www.locus.ufv.br/handle/123456789/7555
identifier_str_mv DIAS, Carla da Silva. Leaf gas eExchange and chlorophyll a fluorescence imaging of soybean leaves infected with Colletotrichum truncatum. 2015. 26f. Dissertação (Mestrado em Fisiologia Vegetal) - Universidade Federal de Viçosa, Viçosa. 2015.
url http://www.locus.ufv.br/handle/123456789/7555
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Federal de Viçosa
publisher.none.fl_str_mv Universidade Federal de Viçosa
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
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