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        Fungal diversity and metabolomic profiles in GM and isogenic non-GM maize cultivars from Brazil

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        Author
        Marcon Gasperini, Alessandra
        Garcia-Cela, Esther
        Sulyok, Michael
        Medina, A.
        Magan, Naresh
        Attention
        2299/23267
        Abstract
        There is little knowledge of the microbial diversity, mycotoxins and associated secondary metabolites in GM maize and isogenic non-GM cultivars (cvs). This study has quantified the microbial populations and dominant fungal genera in 6 cvs of each type representative of herbicide, pesticide or stacked resistance to both. The predominant mycotoxins and targeted metabolomics profiles were also compared between the two sets of cvs. This showed that the overall fungal populations were 8.8 CFUs g−1 maize. The dominant genera, isolated from maize samples, whether surface-sterilised or not, in all maize cvs were Fusarium, followed by Penicillium, Aspergillus and occasionally Cladosporium and Alternaria. The analysis of the targeted metabolomics showed that approx. 29 different metabolites were detected. These were dominated by fumonisins and minor Penicillium spp. metabolites (questiomycin A and rugulovasine A). Interestingly, the range and number of mycotoxins present in the GM cvs were significantly lower than in the non-GM maize samples. This suggests that while the fungal diversity of the two types of maize appeared to be very similar, the major contaminant mycotoxins and range of toxic secondary metabolites were much lower in the GM cvs.
        Publication date
        2021-02-01
        Published in
        Mycotoxin Research
        Published version
        https://doi.org/10.1007/s12550-020-00414-8
        License
        http://creativecommons.org/licenses/by/4.0/
        Other links
        http://hdl.handle.net/2299/23267
        Relations
        School of Life and Medical Sciences
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