Efeito de temperatura e molhamento foliar em Phoma tarda e mancha de phoma em mudas de cafeeiro
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , , , , |
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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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) |
instacron_str |
UFLA |
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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1815439281249845248 |