Nutrition in Fungi
Absorptive Heterotrophs:
Fungi obtain their food by direct absorption from the immediate environment, and are thus absorptive heterotrophs.Saptrotrophs or Saprobs:
Fungi secrete digestive enzyme. The enzymes breakdown dead organic molecules. The organic molecules thus produced are absorbed by the fungus. Saprobic fungi anchor to the substrates by modified hyphae, the rhizoids.
Decomposers:
Fungi decompose cellulose and lignin, the main component of plant cell wall, which most bacteria cannot break.
Parasites:
Parasitic fungi absorb nutrients directly from the host cytoplasm with the help of haustoria, which are special hyphal tips. Parasites may be obligate or facultative.
Predators:
The oyster mushroom Pleurotus ostreatus is a predatory (Carnivorous) fungus. The fungus paralyzes the nematodes, penetrates through them and absorb their nutritional contents, primarily to fulfill its nitrogen requirement.
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