Nester's Microbiology 8th Edition by Denise Anderson,Sarah Salm,Deborah Allen

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Fungi have chitin in their cell walls and absorb nutrients after secreting digestive enzymes onto a food source. As saprophytes, they are important recyclers of carbon and other elements. Fungi can also form important relationships with other organisms, such as seen in lichens or mycorrhizas. Fungi may be single-celled yeasts or multicellular molds that grow by extending tube-like hyphae into a food source. They may reproduce sexually by fusion of hyphae of different mating types, or asexually. Fungi cause significant plant diseases and food spoilage, but also are a food source and are used in food production. Relatively few fungi cause human disease.
Why would conidia formation increase when food supplies of the fungus are diminishing?