Atividade antifúngica de extratos de Momordica charantia L. e Lafoensia pacari St. Hil. sobre Colletotrichum musae (Berk. & M. A. Curtis) Arx
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Data
2008-12-02
Autores
Silva, Marcia Fernanda da [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
Plantas apresentam grande diversidade de compostos orgânicos que podem ter ação antifúngica. O objetivo deste estudo foi determinar a atividade antifúngica in vitro e in vivo de extratos de pacari e melão-de-são-caetano sobre o crescimento micelial e a germinação de esporos de Colletotrichum musae. Avaliou-se, também o efeito dos extratos no desenvolvimento de lesões de antracnose em bananas, da variedade Nanicão, sob condições de laboratório e a campo. Os extratos foram obtidos a partir de plantas secas ao sol e em estufa com circulação forçada de ar, moídas, utilizando-se como agente extrator a água ou álcool etílico. Somente o fungicida proporcionaram 100% de inibição do crescimento micelial e da germinação de esporos e o extrato de melão-de-são-caetano hidroetanólico, seco so sol, incorporado a 50% em BDA, proporcionaram 100% de inibição da germinação de esporos. Os extratos de pacari aquoso não diluído proporcionaram as menores percentagens de lesões de antracnose nos frutos. Os extratos hidroetanólicos de pacari retardaram a maturação dos frutos em quatro-cinco dias em relação a testemunha. As propriedades antifúngicas dos extratos de pacari e melão-de-são-caetano detectadas em nosso estudo evidenciaram o uso potencial dos mesmos como uma alternativa aos métodos adotados para o controle da antracnose em banana.
Plants present a high diversity of organic compounds that can have antifungal activity. The objective of this study was to determine the in vitro and in vivo antifungal activity of pacari and bitter melon extracts on the mycelial growth and spores germination of Colletotrichum musae. We also aimed to evaluate the effect of these two extracts in the development of anthracnose lesions on bananas variety Nanicão, under laboratory and field conditions. The extracts were obtained by grinding sun- or stews with forced circulation of air plant tissues, using water or ethylic alcohol as extractors. Only the fungicide check inhibited 100% of the mycelial growth and the spores germination, and of bitter melon hydro-ethanolic extracts incorporated at 50% in PDA inhibited 100% of the spores germination. The non-diluted aqueous extracts of pacari provided the lowest percentages of anthracnose lesions on banana fruits. The hydro-ethanolic extract of pacari delayed the maturation of the fruits in at least four to five days in relation to the non-treated checks. The antifungal properties of the pacari and bitter melon extracts detected in our study evidenced their potential use as alternative to the methods commonly adopted for controlling banana anthracnose.
Plants present a high diversity of organic compounds that can have antifungal activity. The objective of this study was to determine the in vitro and in vivo antifungal activity of pacari and bitter melon extracts on the mycelial growth and spores germination of Colletotrichum musae. We also aimed to evaluate the effect of these two extracts in the development of anthracnose lesions on bananas variety Nanicão, under laboratory and field conditions. The extracts were obtained by grinding sun- or stews with forced circulation of air plant tissues, using water or ethylic alcohol as extractors. Only the fungicide check inhibited 100% of the mycelial growth and the spores germination, and of bitter melon hydro-ethanolic extracts incorporated at 50% in PDA inhibited 100% of the spores germination. The non-diluted aqueous extracts of pacari provided the lowest percentages of anthracnose lesions on banana fruits. The hydro-ethanolic extract of pacari delayed the maturation of the fruits in at least four to five days in relation to the non-treated checks. The antifungal properties of the pacari and bitter melon extracts detected in our study evidenced their potential use as alternative to the methods commonly adopted for controlling banana anthracnose.
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Palavras-chave
Banana - Doenças e pragas, Antracnose, Melão-de-são-caetano, Pacari, Extrato vegetal, Musa spp, Bitter melon, Pacari, Anthracnose, Plant extracts
Como citar
SILVA, Marcia Fernanda da. Atividade antifúngica de extratos de Momordica charantia L. e Lafoensia pacari St. Hil. sobre Colletotrichum musae (Berk. & M. A. Curtis) Arx. 2008. 74 f. Dissertação (mestrado) - Universidade Estadual Paulista, Faculdade de Engenharia de Ilha Solteira, 2008.