LIFESCI 1 Lecture Notes - Lecture 14: Saprotrophic Nutrition, Zygomycota, Mycelium
Document Summary
Fungi: mushrooms, sac fungi, lichens, yeast, molds, rusts. Fungal morphology: both reproductive structure and mycelium are composed of hyphae. Composition of hyphae: chitin- polysaccharide, gives strength to the cell walls of fungi. Resistance to volume changes in a moist environment. Secrete enzymes that break down starch, cellulose, and lignin into smaller compounds. Absorb compounds directly across cell walls: saprophytic fungi: decompose plant material. Finding food and growth: fungi are multicellular and have highly branched laments called hyphae, fungi move via growth, when a food source is encountered- there is rapid growth and expansion of the mycelium. Saprophytic fungi & carbon cycle: digest dead plant material, while some bacteria decompose lignin, fungi are the key decomposers of wood. Monday, october 24, 2016: hyphae, regularly placed septa, complex multicellular fruiting bodies. Fungal groups have different reproductive structures: chytrids, zygomycetes, basidiomycetes, ascomycetes. General fungal life cycle: most fungi reproduce asexually and sexually: asexual reproduction: some fungi might only reproduce asexually.
