Abstract
The objectives of this investigation were to evaluate the antifungal and antimycotoxigenic properties of peanut skin extracts (PSE) against Fusarium verticillioides. The PSE were prepared by a multisolvent extraction procedure, and the activity on growth parameters and fumonisin B1 (FB1) production of the three PSE was explored at different concentrations on potato dextrose agar and in artificially infected maize kernels, respectively. The results demonstrated that all PSE had a significant influence on growth rate or lag phase of F. verticillioides. The yellow and purple (250–500μgml−1) extracts decreased growth rate, whereas brown extract extended the lag phase. Only the yellow extract at 62.5μgml−1 was able to affect both growth rate and lag phase. With respect to mycotoxin production a significant stimulation on FB1 production was observed with purple (62.5μgml−1) and brown (250μgml−1) extracts. In contrast, a significant decreased in FB1 was observed at 62.5μgml−1 of yellow extract. These findings showed that natural compounds from PSE possess inhibitory effects on F. verticillioides growth and mycotoxin production. Thus, PSE could be use as an alternative to minimize fungal contamination.
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