BIOL 1020 Lecture 20: Lecture 20

• School: University of Manitoba
• Department: Biological Sciences
• Course: BIOL 1020
• Professor: Joy E.Stacey

Document Summary

Microorganisms 2: fungi and the protists" (lecture 20) Fungal nutrition: heterotrophs, heterotrophs cannot manufacture own food, several types of heterotrophs, decomposers (or saprotrophs sapro-greek for rotten", obtain their organic compounds from non-living (once live) substrates, substrates = what the organism is living on or in. Decomposers: substrates are often dead organisms, animals, plants, fungi, bacteria, substrates are sources of organic compounds. Parasites: parasites or biotrophs (parasitos greek for eating with another", parasites obtain their organic compounds from living substrates, sometimes have specialized structures for the interaction with living cells (e. g. haustoria, some parasites are pathogenic, causing disease. Parasites have host organisms: plants e. g. dutch elm disease. Parasites have host organisms: animals, etc. e. g. athlete"s foot. Other types of heterotrophy: mutualisms, mycorrhizas, lichens, predation. How do fungi extract nutrients from substrates: animals mouth, teeth or gizzards, stomach, complex tissues and organs to accomplish this, unicells (e. g. paramecium) take food particles into the cell, broken down by lyzosomes.