Óleos essenciais como controle alternativo de fitopatógenos
At the present study we evaluated the potential of essential oils of species Cymbopogon Nardus L. (Citronella grass), Copaifera sp. (Copaiba) and Ocimum basilicum L. (Basil) in control phytopathogens associated seeds marketed of O basilicum; the essential oil chemical composition of Morinda citrifol...
| Autor principal: | Veloso, Ronice Alves |
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| Grau: | Tese |
| Idioma: | pt_BR |
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Universidade Federal do Tocantins
2017
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| Acesso em linha: |
http://hdl.handle.net/11612/379 |
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ir-11612-379 |
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ir-11612-3792019-05-25T06:08:46Z Óleos essenciais como controle alternativo de fitopatógenos Veloso, Ronice Alves Santos, Gil Rodrigues dos Controle biológico Enzimas antioxidativas Fitoalexinas Fungitoxicidade Biological control Antioxidative enzymes Phytoalexins Fungitoxicity CNPQ::CIENCIAS AGRARIAS At the present study we evaluated the potential of essential oils of species Cymbopogon Nardus L. (Citronella grass), Copaifera sp. (Copaiba) and Ocimum basilicum L. (Basil) in control phytopathogens associated seeds marketed of O basilicum; the essential oil chemical composition of Morinda citrifolia L. (Noni) and its fungitoxic activity in vitro and in vivo in control of phytopathogens causers of leaf blotch, as well as the its potential for phytoalexin synthesis and enzymes induction involved in the mechanisms disease resistance and defense in maize plants. Due to the complexity of the chemical composition of essential oils, such substances have presented promising potential in the control of pathogenic agents. Observed that essential oils presented potential for inhibition of mycoflora associated to O. basilicum seeds, and the essential oil of C. nardus was effective in vitro control inhibiting spore germination and mycelial growth of the phytopathogen Curvularia sp., besides having been also, effective in the preventive control of Curvularia spot disease in O. basilicum plants. Although there is no information about the use of essential oil of M. citrifolia fruits on the control of phytopathogens, the results showed that the essential oil of this species was effective in inhibiting the mycelial growth and the blotch severity of disease caused by phytopathogens Bipolaris maydis and Exserohilum turcicum, presenting AUDPC values lower than those observed when plants were sprayed with fungicides. It was also observed that the essential oil presented potential in phytoalexin and enzymes synthesis involved in resistance and defense mechanisms in maize plants. No presente estudo, foram avaliados o potencial dos óleos essenciais das espécies Cymbopogon nardus L. (Capim citronela), Copaifera sp. (Copaíba) e Ocimum basilicum L. (Manjericão) no controle de fitopatógenos associados a sementes comercializadas de manjericão; também foi determinada a composição química do óleo essencial de Morinda citrifolia L. (Noni) e sua atividade fungitóxica in vitro e in vivo no controle de fitopatógenos causadores de helmintosporiose, bem como seu potencial na indução de síntese de fitoalexinas e enzimas envolvidas nos mecanismos resistência a doenças e defesa em plantas de milho. Devido à complexidade da composição química dos óleos essenciais, tais substâncias têm apresentado potencial promissor no controle de agentes fitopatogênicos. Observou-se que os óleos essenciais apresentam potencial de inibição da micoflora associada às sementes de O. basilicum, e o óleo essencial de C. nardus foi eficiente no controle in vitro inibindo a germinação de conídios e o crescimento micelial do fitopatógeno Curvularia sp., além de ter sido também, eficaz no controle preventivo da mancha de Curvularia em plantas de O. basilicum. Apesar de não haver informações quanto a utilização do óleo essencial de frutos de M. citrifolia no controle de fitopatógenos, os resultados demonstraram que o óleo essencial desta espécie foi eficiente na inibição do crescimento micelial e na severidade da doença helmintosporiose do milho causada pelos fitopatógenos Bipolaris maydis e Exserohilum turcicum, apresentando valores de ACPD inferiores aos valores observados quando as plantas foram pulverizadas com fungicida. Também observou-se que o óleo essencial apresentou potencial na síntese de fitoalexinas envolvidas nos mecanismos de resistência e defesa vegetal em plantas de milho. 2017-05-11T13:26:53Z 2017-05-11T13:26:53Z 2016-05-25 Tese VELOSO, Ronice Alves. Óleos essenciais como controle alternativo de fitopatógenos.2016.140f. Tese (Doutorado em Produção Vegetal) – Universidade Federal do Tocantins, Programa de Pós-Graduação em Produção Vegetal, Gurupi, 2016. http://hdl.handle.net/11612/379 pt_BR Open Access application/pdf application/pdf Universidade Federal do Tocantins BR Programa de Pós-Graduação em Produção Vegetal - PPGPV Gurupi |
| institution |
Repositório Institucional - Universidade Federal do Tocantins - UFT |
| collection |
RepositorioUFT |
| language |
pt_BR |
| topic |
Controle biológico Enzimas antioxidativas Fitoalexinas Fungitoxicidade Biological control Antioxidative enzymes Phytoalexins Fungitoxicity CNPQ::CIENCIAS AGRARIAS |
| spellingShingle |
Controle biológico Enzimas antioxidativas Fitoalexinas Fungitoxicidade Biological control Antioxidative enzymes Phytoalexins Fungitoxicity CNPQ::CIENCIAS AGRARIAS Veloso, Ronice Alves Óleos essenciais como controle alternativo de fitopatógenos |
| topic_facet |
Controle biológico Enzimas antioxidativas Fitoalexinas Fungitoxicidade Biological control Antioxidative enzymes Phytoalexins Fungitoxicity CNPQ::CIENCIAS AGRARIAS |
| description |
At the present study we evaluated the potential of essential oils of species Cymbopogon Nardus L. (Citronella grass), Copaifera sp. (Copaiba) and Ocimum basilicum L. (Basil) in control phytopathogens associated seeds marketed of O basilicum; the essential oil chemical composition of Morinda citrifolia L. (Noni) and its fungitoxic activity in vitro and in vivo in control of phytopathogens causers of leaf blotch, as well as the its potential for phytoalexin synthesis and enzymes induction involved in the mechanisms disease resistance and defense in maize plants. Due to the complexity of the chemical composition of essential oils, such substances have presented promising potential in the control of pathogenic agents. Observed that essential oils presented potential for inhibition of mycoflora associated to O. basilicum seeds, and the essential oil of C. nardus was effective in vitro control inhibiting spore germination and mycelial growth of the phytopathogen Curvularia sp., besides having been also, effective in the preventive control of Curvularia spot disease in O. basilicum plants. Although there is no information about the use of essential oil of M. citrifolia fruits on the control of phytopathogens, the results showed that the essential oil of this species was effective in inhibiting the mycelial growth and the blotch severity of disease caused by phytopathogens Bipolaris maydis and Exserohilum turcicum, presenting AUDPC values lower than those observed when plants were sprayed with fungicides. It was also observed that the essential oil presented potential in phytoalexin and enzymes synthesis involved in resistance and defense mechanisms in maize plants. |
| author_additional |
Santos, Gil Rodrigues dos |
| author_additionalStr |
Santos, Gil Rodrigues dos |
| format |
Tese |
| author |
Veloso, Ronice Alves |
| title |
Óleos essenciais como controle alternativo de fitopatógenos |
| title_short |
Óleos essenciais como controle alternativo de fitopatógenos |
| title_full |
Óleos essenciais como controle alternativo de fitopatógenos |
| title_fullStr |
Óleos essenciais como controle alternativo de fitopatógenos |
| title_full_unstemmed |
Óleos essenciais como controle alternativo de fitopatógenos |
| title_sort |
Óleos essenciais como controle alternativo de fitopatógenos |
| publisher |
Universidade Federal do Tocantins |
| publishDate |
2017 |
| url |
http://hdl.handle.net/11612/379 |
| _version_ |
1787134109049421824 |
| score |
11.675088 |