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• W4327743184 abstract "Macrophomina phaseolina é um fitopatógeno de solo com ampla distribuição geográfica, responsável por ocasionar perdas econômicas graves incitando sintomas de podridões no sistema radicular e caule das plantas infectadas. Há uma demanda mundial crescente por novos tratamentos, que promovam a segurança alimentar e nutricional, com substâncias mais eficazes e menos danosas ao equilíbrio dos ecossistemas. O objetivo da pesquisa foi avaliar o efeito antifúngico in vitro de óleos essenciais (OEs) sobre o crescimento micelial de M. phaseolina. Os OEs utilizados foram testados nas doses 0,8; 1,6; 3,2; 6,4 e 12,8 μL por superfície do meio de cultura BDA (batata-dextrose-ágar). Foram analisadas a inibição do crescimento micelial e a taxa de crescimento micelial. As avaliações consistiram em aferições dos diâmetros de crescimento com 3 e 6 dias de incubação. Os OEs de canela, a partir da dose inicial testada; orégano e cravo, na dose 3,2 μL demonstraram atividade antifúngica contra M. phaseolina. Já os OEs de manjericão, melaleuca, citronela, menta e tomilho demonstraram atividade fungistática. Os OEs de gengibre e laranja inibiram menos de 40% o crescimento micelial. Atingiu-se a inibição total do crescimento micelial com os OEs de canela, orégano e cravo, portanto, apresentaram potencial de uso como agente biofungicida. Palavras-chave: produtos naturais, podridão radicular, química verde. Antifungal activity of essential oils against Macrophomina phaseolina ABSTRACT: Macrophomina phaseolina is a soil‐borne phytopathogen with has a wide geographical distribution, being responsible for causing serious economic losses inciting stem and root rot symptoms of infected plants. There is a growing worldwide demand for new treatments that promote food and nutritional security, with substances that are more effective and less harmful to the balance of ecosystems. Thus, this research aimed to evaluate the in vitro antifungal effect of essential oils (EOs) on the mycelial growth of M. phaseolina. The EOs used were tested at doses 0.8; 1.6; 3.2; 6.4 and 12.8 μL per surface of the PDA (potato-dextrose-agar) culture medium. Mycelial growth inhibition and mycelial growth rate were analyzed. The evaluations consisted of measurements of the growth diameters with 3 and 6 days of incubation. The cinnamon EO, from the initial tested concentration; oregano and cloves EOs, at a concentration of 3.2 μL demonstrated antifungal activity against M. phaseolina. The EOs of basil, tea tree, citronella, mint and thyme showed a fungistatic activity. Ginger and sweet Orange EOs inhibited less than 40% of mycelial growth. The complete inhibition of mycelial growth was achieved with cinnamon, oregano and clove EOs, therefore, they presented potential for use as a biofungicide agent. Keywords: natural products; root rot; green chemistry." @default.
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• W4327743184 date "2023-03-16" @default.
• W4327743184 modified "2023-09-30" @default.
• W4327743184 title "ATIVIDADE ANTIFÚNGICA DE ÓLEOS ESSENCIAIS FRENTE A Macrophomina phaseolina" @default.
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• W4327743184 doi "https://doi.org/10.31413/nativa.v11i1.13811" @default.
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