work kind comprehensive botanical kingdom fungi reasonably modern'' many fungi produce toxins antibiotics ref name brian ref secondary metabolites example cosmopolitan worldwide genus ''fusarium'' toxins associated fatal outbreaks alimentary toxic aleukia humans extensively studied abraham joffe ref name joffeyagen eg ref fungi fundamental life earth roles symbionts eg form mycorrhizae insect symbionts lichens many fungi able break complex organic biomolecules lignin durable component wood pollutants
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