Effects of volatile bacterial metabolites on the growth, sporulation and mycotoxin production of fungi

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Abstract
Five toxigenic fungi were grown in the presence of pure cultures of a number of different bacteria. Alterations in the gaseous environment resulting from bacterial growth produced changes in the growth, sporulation and toxin production of the fungi. Different fungi varied in their response to any one bacterium, and different bacteria produced a variety of responses from each individual fungus. The growth, sporulation and toxin production of most fungi were normally inhibited by the presence of bacteria; in a few cases toxin production was stimulated. Toxin production was able to proceed in the absence of sporulation.The implications of bacterium–fungus interactions in certain environments are considered.