IMG_0058_NEW - fluic{s of their living hosts Parasitic ftrngi usually have moclified h,vphal tips called haustoria that penetrate the host tissues

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Fungal Nutrition A11 fungi are absorptive heterotrophs. Thei' are an essential component of all terrestrial ecosystems as effective decomposcrs ias discussed on pug*r 6g6-637 of vour text) and as mutuatristic associates of plants, cyanob;rcteria] a,n.j green algae. lbu'll learn more about fungal muttralism on the forest rvalk. Fungi as Decomposers Fungi (together rvith bacteria) are the principal decomposers in terrestrial ecosystems. Fungarl hyphae invade the tissues and cells of dead organisms, secreting digestirre enzlrmes and absorbing the proclucts of rligestion. Decompositicn bv flungi and bacteria is essential for the cycling of carion ancl inorgauic minerals in ecosystems. Fungi as Parasites M*,t fungi are parasitic, ab,sorbing nutrients from the body
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Unformatted text preview: fluic{s of their living hosts. Parasitic ftrngi usually have moclified h,vphal tips called haustoria that penetrate the host tissues to absorb nutrients. Figure 2.9 shorvs a parasitic fungus. Fungi as Carnivores \{any species of fungi are capable of carni-voryi especiallv in nitrogen-poor soils. Figure 2.9: Parasitic fungus. Some predatory fungi develop riirg-like hyphae that constrict like a noose to capture srnall nematodes (round-worms). Fungal haustoria then grrxr,'into the prer- body; releasing digestive enzvmes and ahserrbing nutrients from the pre1,'. Exercise 2 Cornivory in Fungi S.qre species of fungiore octive predotors, kopping ond devouring smollonimols rych os nemotodes. tfl l.l ET [Lire Divides & Conquers the Land 53...
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This note was uploaded on 12/27/2011 for the course BISC 333 taught by Professor Mattsson during the Fall '09 term at Simon Fraser.

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