Abstract

CAMARGO PINERES, Yessica et al. In vitro antifungal activity of the essential oil of Swinglea glutinosa Merr against mango (Mangifera indica L.) pathogen Colletotrichum sp. Rev. colomb. biotecnol [online]. 2021, vol.23, n.1, pp.62-71.  Epub Aug 11, 2021. ISSN 0123-3475.  https://doi.org/10.15446/rev.colomb.biote.v23n1.88025.

The antifungal activity of the essential oil of Swinglea glutinosa on the fungus Colletotrichum sp. isolated from mango (Mangifera indica L) fruit was evaluated. The essential oil was obtained by hydrodistillation of leaves and fruit rind, and phytochemistry was determined by gas chromatography coupled to mass spectrometry. Forty-one secondary metabolites were presumptively identified, the major compounds being (β-pinene (31.3 %), α-pinene (15.1 %) and germacrene D (14.4 %). The essential oil inhibited fungal growth by 31.16 %, 52.77 % and 82.41 % in agar dilution assay, at concentrations of 0.3, 1 and 2 % respectively, with differences among all treatments evaluated (p=0.000). In the broth dilution test, spore germination inhibition of 0, 19.47, 41.03 and 100 % (p=0.000) was recorded at concentrations of 0, 2, 4 and 8 μL/mL. Additionally, in microatmosphere assay, a maximum inhibition of 22.97 % of mycelial growth was presented with the addition of 20 μL of essential oil per Petri dish. This work found that the essential oil of S. glutinosa exerts dose-dependent inhibition on mycelial growth and spore germination of Colletotrichum sp.

Keywords : extraction; antimicrobial; in vitro; inhibition.

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