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Type: | Artigo de Periódico |
Title: | Chemical composition of the essential oil of Psidium guajava leaves and its toxicity against Sclerotinia sclerotiorum |
Other Titles: | Composição química do óleo essencial de folhas de Psidium guajava e sua toxicidade contra Sclerotinia sclerotiorum |
Authors: | Elizabeth Aparecida Josefi Silva Vanessa Paula da Silva Cassia Cristina Fernandes Alves José Milton Alves Edson Luiz Souchie Luiz Cláudio de Almeida Barbosa |
Abstract: | Globally, the fungus Sclerotinia sclerotiorum is considered as one of the most important phytopathogens, since it affects the production of several economically important crops. Further, it is difficult to control, thus increasing the use of pesticides. Therefore, the search for new substances, especially those extracted from plants, has received special attention to control this plant pathogen. The objective of the present study was to evaluate the yield and chemical composition of the essential oil extracted from the fresh leaves of guava collected during the rainy and dry seasons, and also to evaluate its toxicity against S. sclerotiorum. The experiment was a completely randomized design with five treatments and six replicates. The essential oil was extracted by hydrodistillation of the leaves and analyzed by gas chromatography-flame ionization detector and gas chromatography-mass spectrometry. The main compounds identified in the essential oil were trans-caryophyllene and ?-humulene. The essential oil at a concentration of 300 ?L exhibited 90% inhibition of the mycelial growth of S. sclerotiorum. This confirmed the antifungal potential of the essential oil of the guava leaves during both the sampling seasons. |
Abstract: | O fungo Sclerotinia sclerotiorum é considerado um dos fitopatógenos mais importantes no mundo, pois afeta a produção de diversas culturas de importância econômica, e possui difícil controle, aumentando, assim, a necessidade de crescentes aplicações de defensivos agrícolas. Dessa forma, a busca de novas substâncias, principalmente aquelas extraídas de plantas, tem recebido especial atenção como forma de controle desse fitopatógeno. Com este trabalho, objetivou-se avaliar o rendimento, a composição química e a toxicidade frente a S. sclerotiorum do óleo essencial extraído de folhas in natura de goiabeira coletadas na época das chuvas e da seca. O delineamento utilizado foi inteiramente casualizado, com cinco tratamentos e seis repetições. O óleo essencial foi extraído por hidrodestilação das folhas e analisado por CG-DIC e CG-EM. Os compostos majoritários identificados no óleo essencial foram o trans-cariofileno e alfa-humuleno. O óleo essencial possibilitou taxa de inibição micelial de S. sclerotiorum acima de 90% com o tratamento de 300 uL, confirmando o potencial antifúngico do óleo essencial de folhas de goiabeira em ambas as épocas de coleta avaliadas. |
Subject: | Sesquiterpenos Essências e óleos essenciais Fungos fitopatogênicos Atividade antifúngica |
language: | eng |
metadata.dc.publisher.country: | Brasil |
Publisher: | Universidade Federal de Minas Gerais |
Publisher Initials: | UFMG |
metadata.dc.publisher.department: | ICX - DEPARTAMENTO DE QUÍMICA |
Rights: | Acesso Aberto |
metadata.dc.identifier.doi: | https://doi.org/10.5433/1679-0359.2018v39n2p865 |
URI: | http://hdl.handle.net/1843/59323 |
Issue Date: | 15-Mar-2018 |
metadata.dc.url.externa: | https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/27652 |
metadata.dc.relation.ispartof: | Semina: Ciências Agrárias |
Appears in Collections: | Artigo de Periódico |
Files in This Item:
File | Description | Size | Format | |
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Chemical composition of the essential oil of Psidium guajava leaves and its toxicity against Sclerotinia sclerotiorum.pdf | 251.03 kB | Adobe PDF | View/Open |
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