Antifungal activity and ultrastructural alterations in Pseudocercospora griseola treated with essential oils
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFLA |
Texto Completo: | http://repositorio.ufla.br/jspui/handle/1/28374 |
Resumo: | Pseudocercospora griseola, the etiologic agent of angular leaf spot of common bean (Phaseolus vulgaris), is an important disease in all bean-producing regions worldwide and may cause extremely high yield losses. The control of this disease is made more difficult by the pathogen's genetic variability and the inefficiency of fungicides. In this study, of 26 essential oils tested at different concentrations, 25 demonstrated efficiency in affecting the germination of strains 63-31 and 63-63 of the pathogen, reaching inhibition levels of between 80% and 100%. Cymbopogon citratus and Cymbopogon martinii inhibited conidia germination at all concentrations; Eugenia caryophyllata, Cinnamomum sp., Thymus vulgaris, Matricaria recutita, Cordia verbenacea, Origanum vulgare, Cymbopogon nardus, at 0.1 and 0.5%; and Zingiber officinale, Mentha arvensis, Chamaecyparis pisifera, Lavandula officinalis, Ocimum basilicum, Pimpinella anisum, Ocimum selloi, Baccharis dracunculifolia, Laurus nobilis, Citrus sinensis, Melaleuca alternifolia and Eucalyptus globulus, at 0.5%. The main constituents identified were cinnamaldehyde in Cinnamomum sp.; eugenol in E. caryophyllata; trans-β-farnesene in M. recutita; pulegone in C. verbenacea; thymol in T. vulgaris; geranial and neral in C. citratus, and geraniol in C. martini. Through transmission electron microscopy (TEM), it was verified that C. citratus, C. martini and E. caryophyllata presented direct fungitoxic action on P. griseola, causing severe damage to the cellular ultrastructure of the conidia, invalidating germination. These results indicated that essential oils are a promising alternative strategy for the control of angular leaf spot in bean, representing less risk to human health and the environment. |
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Antifungal activity and ultrastructural alterations in Pseudocercospora griseola treated with essential oilsAtividade antifúngica e alterações ultraestruturais em Pseudocercospora griseola tratado com óleos essenciaisAngular leaf spotTransmission electron microscopyAlternative control of plant diseaseMancha angularMicroscopia eletrônica de transmissãoControle alternativo de doenças de plantasBean - DiseasesFeijão - DoençasPseudocercospora griseola, the etiologic agent of angular leaf spot of common bean (Phaseolus vulgaris), is an important disease in all bean-producing regions worldwide and may cause extremely high yield losses. The control of this disease is made more difficult by the pathogen's genetic variability and the inefficiency of fungicides. In this study, of 26 essential oils tested at different concentrations, 25 demonstrated efficiency in affecting the germination of strains 63-31 and 63-63 of the pathogen, reaching inhibition levels of between 80% and 100%. Cymbopogon citratus and Cymbopogon martinii inhibited conidia germination at all concentrations; Eugenia caryophyllata, Cinnamomum sp., Thymus vulgaris, Matricaria recutita, Cordia verbenacea, Origanum vulgare, Cymbopogon nardus, at 0.1 and 0.5%; and Zingiber officinale, Mentha arvensis, Chamaecyparis pisifera, Lavandula officinalis, Ocimum basilicum, Pimpinella anisum, Ocimum selloi, Baccharis dracunculifolia, Laurus nobilis, Citrus sinensis, Melaleuca alternifolia and Eucalyptus globulus, at 0.5%. The main constituents identified were cinnamaldehyde in Cinnamomum sp.; eugenol in E. caryophyllata; trans-β-farnesene in M. recutita; pulegone in C. verbenacea; thymol in T. vulgaris; geranial and neral in C. citratus, and geraniol in C. martini. Through transmission electron microscopy (TEM), it was verified that C. citratus, C. martini and E. caryophyllata presented direct fungitoxic action on P. griseola, causing severe damage to the cellular ultrastructure of the conidia, invalidating germination. These results indicated that essential oils are a promising alternative strategy for the control of angular leaf spot in bean, representing less risk to human health and the environment.Pseudocercospora griseola, agente etiológico da mancha angular do feijoeiro comum (Phaseolus vulgaris), é uma doença importante nas regiões produtoras de feijão em todo o mundo e pode causar perdas de produtividade extremamente elevados. O controle dessa doença é dificultado pela variabilidade genética do patógeno e da ineficiência de fungicidas. Neste estudo, de 26 óleos essenciais testados em concentrações diferentes, 25 demonstraram eficiência em inibir a germinação das linhagens 63-31 e 63-63 do agente patogênico, atingindo níveis de inibição entre 80% e 100%. Cymbopogon citratus e Cymbopogon martini inibiram a germinação de conídios em todas as concentrações; Eugenia caryophyllata, Cinnamomum sp., Thymus vulgaris, Matricaria recutita, Cordia verbenacea, Origanum vulgare, Cymbopogon nardus, em 0,1 e 0,5%, e Zingiber officinale, Mentha arvensis, Chamaecyparis pisifera, Lavandula officinalis, Ocimum basilicum, Pimpinella anisum, Ocimum selloi, Baccharis dracunculifolia, Laurus nobilis, Citrus sinensis, Melaleuca alternifolia e Eucalyptus globulus, em 0,5%. Os principais constituintes identificados foram cinamaldeído em Cinnamomum sp.; Eugenol em E. caryophyllata; trans-β-farneseno em M. recutita; pulegona em C. verbenacea; timol em T. vulgaris; geranial e neral em C. citratus e geraniol em C. martini. Através de microscopia eletrônica de transmissão (TEM), verificou-se que C. citratus, C. martini e E. caryophyllata apresentaram ação antifúngica direta sobre P. griseola, causando graves danos na ultraestrutura celular dos conídios, invalidando a germinação. Esses resultados indicaram que os óleos essenciais são uma estratégia alternativa promissora para o controle da mancha angular do feijoeiro, o que representa menos risco para a saúde humana e ao ambiente.Universidade Federal de Lavras2018-01-12T14:59:51Z2018-01-12T14:59:51Z2012-05info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfHOYOS, J. M. A. et al. Antifungal activity and ultrastructural alterations in Pseudocercospora griseola treated with essential oils. Ciência e Agrotecnologia, Lavras, v. 36, n. 3, p. 270-284, maio/jun. 2012.http://repositorio.ufla.br/jspui/handle/1/28374Ciência e Agrotecnologiareponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessHoyos, Julián Mauricio ÁgredoAlves, EduardoRozwalka, Luciane CristinaSouza, Elaine Aparecida deZeviani, Walmes Marqueseng2018-01-12T14:59:52Zoai:localhost:1/28374Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2018-01-12T14:59:52Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false |
dc.title.none.fl_str_mv |
Antifungal activity and ultrastructural alterations in Pseudocercospora griseola treated with essential oils Atividade antifúngica e alterações ultraestruturais em Pseudocercospora griseola tratado com óleos essenciais |
title |
Antifungal activity and ultrastructural alterations in Pseudocercospora griseola treated with essential oils |
spellingShingle |
Antifungal activity and ultrastructural alterations in Pseudocercospora griseola treated with essential oils Hoyos, Julián Mauricio Ágredo Angular leaf spot Transmission electron microscopy Alternative control of plant disease Mancha angular Microscopia eletrônica de transmissão Controle alternativo de doenças de plantas Bean - Diseases Feijão - Doenças |
title_short |
Antifungal activity and ultrastructural alterations in Pseudocercospora griseola treated with essential oils |
title_full |
Antifungal activity and ultrastructural alterations in Pseudocercospora griseola treated with essential oils |
title_fullStr |
Antifungal activity and ultrastructural alterations in Pseudocercospora griseola treated with essential oils |
title_full_unstemmed |
Antifungal activity and ultrastructural alterations in Pseudocercospora griseola treated with essential oils |
title_sort |
Antifungal activity and ultrastructural alterations in Pseudocercospora griseola treated with essential oils |
author |
Hoyos, Julián Mauricio Ágredo |
author_facet |
Hoyos, Julián Mauricio Ágredo Alves, Eduardo Rozwalka, Luciane Cristina Souza, Elaine Aparecida de Zeviani, Walmes Marques |
author_role |
author |
author2 |
Alves, Eduardo Rozwalka, Luciane Cristina Souza, Elaine Aparecida de Zeviani, Walmes Marques |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Hoyos, Julián Mauricio Ágredo Alves, Eduardo Rozwalka, Luciane Cristina Souza, Elaine Aparecida de Zeviani, Walmes Marques |
dc.subject.por.fl_str_mv |
Angular leaf spot Transmission electron microscopy Alternative control of plant disease Mancha angular Microscopia eletrônica de transmissão Controle alternativo de doenças de plantas Bean - Diseases Feijão - Doenças |
topic |
Angular leaf spot Transmission electron microscopy Alternative control of plant disease Mancha angular Microscopia eletrônica de transmissão Controle alternativo de doenças de plantas Bean - Diseases Feijão - Doenças |
description |
Pseudocercospora griseola, the etiologic agent of angular leaf spot of common bean (Phaseolus vulgaris), is an important disease in all bean-producing regions worldwide and may cause extremely high yield losses. The control of this disease is made more difficult by the pathogen's genetic variability and the inefficiency of fungicides. In this study, of 26 essential oils tested at different concentrations, 25 demonstrated efficiency in affecting the germination of strains 63-31 and 63-63 of the pathogen, reaching inhibition levels of between 80% and 100%. Cymbopogon citratus and Cymbopogon martinii inhibited conidia germination at all concentrations; Eugenia caryophyllata, Cinnamomum sp., Thymus vulgaris, Matricaria recutita, Cordia verbenacea, Origanum vulgare, Cymbopogon nardus, at 0.1 and 0.5%; and Zingiber officinale, Mentha arvensis, Chamaecyparis pisifera, Lavandula officinalis, Ocimum basilicum, Pimpinella anisum, Ocimum selloi, Baccharis dracunculifolia, Laurus nobilis, Citrus sinensis, Melaleuca alternifolia and Eucalyptus globulus, at 0.5%. The main constituents identified were cinnamaldehyde in Cinnamomum sp.; eugenol in E. caryophyllata; trans-β-farnesene in M. recutita; pulegone in C. verbenacea; thymol in T. vulgaris; geranial and neral in C. citratus, and geraniol in C. martini. Through transmission electron microscopy (TEM), it was verified that C. citratus, C. martini and E. caryophyllata presented direct fungitoxic action on P. griseola, causing severe damage to the cellular ultrastructure of the conidia, invalidating germination. These results indicated that essential oils are a promising alternative strategy for the control of angular leaf spot in bean, representing less risk to human health and the environment. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-05 2018-01-12T14:59:51Z 2018-01-12T14:59:51Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
HOYOS, J. M. A. et al. Antifungal activity and ultrastructural alterations in Pseudocercospora griseola treated with essential oils. Ciência e Agrotecnologia, Lavras, v. 36, n. 3, p. 270-284, maio/jun. 2012. http://repositorio.ufla.br/jspui/handle/1/28374 |
identifier_str_mv |
HOYOS, J. M. A. et al. Antifungal activity and ultrastructural alterations in Pseudocercospora griseola treated with essential oils. Ciência e Agrotecnologia, Lavras, v. 36, n. 3, p. 270-284, maio/jun. 2012. |
url |
http://repositorio.ufla.br/jspui/handle/1/28374 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by/4.0/ |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Lavras |
publisher.none.fl_str_mv |
Universidade Federal de Lavras |
dc.source.none.fl_str_mv |
Ciência e Agrotecnologia 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 |
_version_ |
1807835201716355072 |