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Antifungal properties and inhibitory effects upon aflatoxin production by Zingiber officinale essential oil in Aspergillus flavus
Author(s) -
Nerilo Samuel B.,
Rocha Gustavo Henrique O.,
Tomoike Caroline,
Mossini Simone A. G.,
Grespan Renata,
Mikcha Jane M. G.,
Machinski Miguel
Publication year - 2016
Publication title -
international journal of food science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.831
H-Index - 96
eISSN - 1365-2621
pISSN - 0950-5423
DOI - 10.1111/ijfs.12950
Subject(s) - aspergillus flavus , aflatoxin , mycelium , aspergillus parasiticus , zingiber officinale , essential oil , ergosterol , chemistry , germination , food science , aspergillus , antifungal , biology , botany , traditional medicine , microbiology and biotechnology , biochemistry , medicine
Summary In this study, the efficacy of g inger ( Zingiber officinale Roscoe) essential oil ( GEO ) in reducing A. flavus growth and aflatoxin production was investigated. Gas chromatography coupled to mass spectrometry and nuclear magnetic resonance spectroscopy showed that the major components of GEO were α‐zingiberene (23.85%) and geranial (14.16%). Mycelial growth of Aspergillus flavus was reduced significantly at a GEO concentration of 150 μg mL −1 , and complete inhibition of conidial germination was observed at a concentration of 10 μg mL −1 . Statistically significant inhibition of ergosterol biosynthesis was detected at a GEO concentration of 10 μg mL −1 . GEO was capable of fully inhibiting aflatoxin production by A. flavus at a concentration of 15 μg mL −1 . The results suggest that low concentrations of GEO are capable of inhibiting aflatoxin production; such ability could be valuable in the upcoming future for agricultural companies to better control aflatoxigenic fungi in agricultural products.