Efeito de temperatura e molhamento foliar em Phoma tarda e mancha de phoma em mudas de cafeeiro

Detalhes bibliográficos
Autor(a) principal: Lorenzetti, Emi Rainildes
Data de Publicação: 2015
Outros Autores: Pozza, Edson Ampélio, Souza, Paulo Estevão de, Santos, Leandro Alvarenga, Alves, Eduardo, Silva, André Costa, Maia, Fernanda Gonçalves Martins, Carvalho, Rejane Rodrigues da Costa
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFLA
Texto Completo: http://repositorio.ufla.br/jspui/handle/1/13733
http://www.coffeescience.ufla.br/index.php/Coffeescience/article/view/688
Resumo: Phoma leaf spot is a major disease of coffee plants in regions with specific conditions of temperature and humidity. Despite the importance of environmental variables for disease progression, so far they have been poorly understood. Thus, we assessed the effect of different temperatures (15, 20, 25 and 30 oC) on mycelial growth, production and germination of conidia of Phoma tarda; and the same effect of temperature (15, 20, 25 and 30 oC) and leaf wetness duration (6, 12, 24, 36 and 48 hours) on fungal infection and severity of disease over time in coffee plants. Disease assessment was integrated in the area using the disease progress curve (AUDPC) and the infection processes were observed by scanning electron microscopy (SEM). The optimal temperatures for fungus growth, conidial production and germination in vitro were 22.9, 29.8, and 25.1 °C, respectively. Temperatures ranging from 15-20 °C significantly increased germ tube length and provided favorable conditions for pathogen infection through observation of early events such as cuticle separation from leaf tissue. The same temperature range combined with increasing leaf wetness periods, reached the highest value of the AUDPC of phoma leaf spot. Thus, it was found that both temperature and leaf wetness duration in the variables assessed and the difference in relation to temperature for in vitro growth and sporulation for in vivo tests were important.
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spelling Efeito de temperatura e molhamento foliar em Phoma tarda e mancha de phoma em mudas de cafeeiroEffect of temperature and leaf wetness on Phoma tarda and phoma leaf spot in coffee seedlingsCafé - Doenças e pragasFungos - PatogêneseCoffee - Diseases and pestsFungi - PathogenesisCoffea arabicaPhoma tardaPhoma leaf spot is a major disease of coffee plants in regions with specific conditions of temperature and humidity. Despite the importance of environmental variables for disease progression, so far they have been poorly understood. Thus, we assessed the effect of different temperatures (15, 20, 25 and 30 oC) on mycelial growth, production and germination of conidia of Phoma tarda; and the same effect of temperature (15, 20, 25 and 30 oC) and leaf wetness duration (6, 12, 24, 36 and 48 hours) on fungal infection and severity of disease over time in coffee plants. Disease assessment was integrated in the area using the disease progress curve (AUDPC) and the infection processes were observed by scanning electron microscopy (SEM). The optimal temperatures for fungus growth, conidial production and germination in vitro were 22.9, 29.8, and 25.1 °C, respectively. Temperatures ranging from 15-20 °C significantly increased germ tube length and provided favorable conditions for pathogen infection through observation of early events such as cuticle separation from leaf tissue. The same temperature range combined with increasing leaf wetness periods, reached the highest value of the AUDPC of phoma leaf spot. Thus, it was found that both temperature and leaf wetness duration in the variables assessed and the difference in relation to temperature for in vitro growth and sporulation for in vivo tests were important.Mancha de Phoma é uma das principais doenças do cafeeiro em zonas com condições específicas de temperatura e umidade. Apesar da importância das variáveis ambientais para o progresso da doença, até agora essas têm sido mal compreendidas. Avaliou-neste estudo, o efeito de diferentes temperaturas (15, 20, 25 e 30 ºC) sobre o crescimento micelial, produção e germinação de conídios de Phoma tarda, e o efeito da temperatura (15, 20, 25 e 30 ºC) e da duração do período de molhamento (6, 12, 24, 36 e 48 horas) sobre a infecção fúngica e severidade da doença, ao longo do tempo em plantas de café. A avaliação da doença realizada através da área abaixo da curva de progresso da doença (AACPD) e os processos de infecção foram observados por microscopia eletrônica de varredura (MEV). As temperaturas ótimas para o crescimento de fungos, produção de conídios e germinação foram de 22,9, 29,8, 25,1 °C, respectivamente. Temperaturas variando entre 15-20 °C aumentaram, significativamente, o comprimento do tubo germinativo e proporcionaram condições favoráveis para a infecção pelo patógeno através da observação dos primeiros eventos, tais como a separação da cutícula do tecido foliar. A mesma faixa de temperatura combinada com períodos crescentes de molhamento foliar, no máximo, 48 horas, atingiu os maiores valores da AACPD da Mancha Phoma. Assim, verificou-se que, tanto a temperatura quanto a duração do molhamento para testes in vivo e a influência da temperatura para o crescimento e esporulação in vitro foram importantes.2015-02-122017-08-01T20:07:03Z2017-08-01T20:07:03Z2015info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfLORENZETTI, E. R. et al. Efeito de temperatura e molhamento foliar em Phoma tarda e mancha de phoma em mudas de cafeeiro. Coffee Science, Lavras, v. 10, n. 1, p. 1-9, jan./mar. 2015.http://repositorio.ufla.br/jspui/handle/1/13733http://www.coffeescience.ufla.br/index.php/Coffeescience/article/view/688Coffee Science; v. 10, n. 1 (2015); 1 - 9Coffee Science; v. 10, n. 1 (2015); 1 - 9Coffee Science; v. 10, n. 1 (2015); 1 - 91984-39091809-6875reponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAenghttp://www.coffeescience.ufla.br/index.php/Coffeescience/article/view/688/pdf_152http://www.coffeescience.ufla.br/index.php/Coffeescience/article/downloadSuppFile/688/635http://www.coffeescience.ufla.br/index.php/Coffeescience/article/downloadSuppFile/688/642Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessLorenzetti, Emi RainildesPozza, Edson AmpélioSouza, Paulo Estevão deSantos, Leandro AlvarengaAlves, EduardoSilva, André CostaMaia, Fernanda Gonçalves MartinsCarvalho, Rejane Rodrigues da CostaLorenzetti, Emi RainildesPozza, Edson AmpélioSouza, Paulo Estevão deSantos, Leandro AlvarengaAlves, EduardoSilva, André CostaMaia, Fernanda Gonçalves MartinsCarvalho, Rejane Rodrigues da Costa2021-03-22T17:49:21Zoai:localhost:1/13733Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2021-03-22T17:49:21Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false
dc.title.none.fl_str_mv Efeito de temperatura e molhamento foliar em Phoma tarda e mancha de phoma em mudas de cafeeiro
Effect of temperature and leaf wetness on Phoma tarda and phoma leaf spot in coffee seedlings
title Efeito de temperatura e molhamento foliar em Phoma tarda e mancha de phoma em mudas de cafeeiro
spellingShingle Efeito de temperatura e molhamento foliar em Phoma tarda e mancha de phoma em mudas de cafeeiro
Lorenzetti, Emi Rainildes
Café - Doenças e pragas
Fungos - Patogênese
Coffee - Diseases and pests
Fungi - Pathogenesis
Coffea arabica
Phoma tarda
title_short Efeito de temperatura e molhamento foliar em Phoma tarda e mancha de phoma em mudas de cafeeiro
title_full Efeito de temperatura e molhamento foliar em Phoma tarda e mancha de phoma em mudas de cafeeiro
title_fullStr Efeito de temperatura e molhamento foliar em Phoma tarda e mancha de phoma em mudas de cafeeiro
title_full_unstemmed Efeito de temperatura e molhamento foliar em Phoma tarda e mancha de phoma em mudas de cafeeiro
title_sort Efeito de temperatura e molhamento foliar em Phoma tarda e mancha de phoma em mudas de cafeeiro
author Lorenzetti, Emi Rainildes
author_facet Lorenzetti, Emi Rainildes
Pozza, Edson Ampélio
Souza, Paulo Estevão de
Santos, Leandro Alvarenga
Alves, Eduardo
Silva, André Costa
Maia, Fernanda Gonçalves Martins
Carvalho, Rejane Rodrigues da Costa
author_role author
author2 Pozza, Edson Ampélio
Souza, Paulo Estevão de
Santos, Leandro Alvarenga
Alves, Eduardo
Silva, André Costa
Maia, Fernanda Gonçalves Martins
Carvalho, Rejane Rodrigues da Costa
author2_role author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Lorenzetti, Emi Rainildes
Pozza, Edson Ampélio
Souza, Paulo Estevão de
Santos, Leandro Alvarenga
Alves, Eduardo
Silva, André Costa
Maia, Fernanda Gonçalves Martins
Carvalho, Rejane Rodrigues da Costa
Lorenzetti, Emi Rainildes
Pozza, Edson Ampélio
Souza, Paulo Estevão de
Santos, Leandro Alvarenga
Alves, Eduardo
Silva, André Costa
Maia, Fernanda Gonçalves Martins
Carvalho, Rejane Rodrigues da Costa
dc.subject.por.fl_str_mv Café - Doenças e pragas
Fungos - Patogênese
Coffee - Diseases and pests
Fungi - Pathogenesis
Coffea arabica
Phoma tarda
topic Café - Doenças e pragas
Fungos - Patogênese
Coffee - Diseases and pests
Fungi - Pathogenesis
Coffea arabica
Phoma tarda
description Phoma leaf spot is a major disease of coffee plants in regions with specific conditions of temperature and humidity. Despite the importance of environmental variables for disease progression, so far they have been poorly understood. Thus, we assessed the effect of different temperatures (15, 20, 25 and 30 oC) on mycelial growth, production and germination of conidia of Phoma tarda; and the same effect of temperature (15, 20, 25 and 30 oC) and leaf wetness duration (6, 12, 24, 36 and 48 hours) on fungal infection and severity of disease over time in coffee plants. Disease assessment was integrated in the area using the disease progress curve (AUDPC) and the infection processes were observed by scanning electron microscopy (SEM). The optimal temperatures for fungus growth, conidial production and germination in vitro were 22.9, 29.8, and 25.1 °C, respectively. Temperatures ranging from 15-20 °C significantly increased germ tube length and provided favorable conditions for pathogen infection through observation of early events such as cuticle separation from leaf tissue. The same temperature range combined with increasing leaf wetness periods, reached the highest value of the AUDPC of phoma leaf spot. Thus, it was found that both temperature and leaf wetness duration in the variables assessed and the difference in relation to temperature for in vitro growth and sporulation for in vivo tests were important.
publishDate 2015
dc.date.none.fl_str_mv 2015-02-12
2015
2017-08-01T20:07:03Z
2017-08-01T20:07:03Z
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 LORENZETTI, E. R. et al. Efeito de temperatura e molhamento foliar em Phoma tarda e mancha de phoma em mudas de cafeeiro. Coffee Science, Lavras, v. 10, n. 1, p. 1-9, jan./mar. 2015.
http://repositorio.ufla.br/jspui/handle/1/13733
http://www.coffeescience.ufla.br/index.php/Coffeescience/article/view/688
identifier_str_mv LORENZETTI, E. R. et al. Efeito de temperatura e molhamento foliar em Phoma tarda e mancha de phoma em mudas de cafeeiro. Coffee Science, Lavras, v. 10, n. 1, p. 1-9, jan./mar. 2015.
url http://repositorio.ufla.br/jspui/handle/1/13733
http://www.coffeescience.ufla.br/index.php/Coffeescience/article/view/688
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv http://www.coffeescience.ufla.br/index.php/Coffeescience/article/view/688/pdf_152
http://www.coffeescience.ufla.br/index.php/Coffeescience/article/downloadSuppFile/688/635
http://www.coffeescience.ufla.br/index.php/Coffeescience/article/downloadSuppFile/688/642
dc.rights.driver.fl_str_mv Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.source.none.fl_str_mv Coffee Science; v. 10, n. 1 (2015); 1 - 9
Coffee Science; v. 10, n. 1 (2015); 1 - 9
Coffee Science; v. 10, n. 1 (2015); 1 - 9
1984-3909
1809-6875
reponame:Repositório Institucional da UFLA
instname:Universidade Federal de Lavras (UFLA)
instacron:UFLA
instname_str Universidade Federal de Lavras (UFLA)
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institution UFLA
reponame_str Repositório Institucional da UFLA
collection Repositório Institucional da UFLA
repository.name.fl_str_mv Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)
repository.mail.fl_str_mv nivaldo@ufla.br || repositorio.biblioteca@ufla.br
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