Chapter 31 - Fungi Notes

Chapter 31 - Fungi Notes - STRUCTURE CELL WALL composed of...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
FUNGI- Chapter 31 EX: mold, yeast, mushrooms, mildew  Eukaryotic Most multicellular  (exception = unicellular yeast) HAPLOID  MOST OF LIFE CYCLE HETEROTROPHS – feed by absorption (SAPROPHYTES)      Secrete hydrolytic enzymes to decompose organic material DECOMPOSERS:           Important role in recycling nutrients from dead material in ecosystems PARASITES : absorb organics from living host without killing them     EX: Athlete’s foot; Ringworm, Dutch elm disease, Ergot PREDATORS: trap/paralyze live prey (ie. Nematode worms) SYMBIOSIS :   LICHENS : (fungi + algae) make soil from rock MYCORRHIZAE (fungi + plants)   Provide H 2 0/phosphates/other ions to host;    Increases surface area for absorption by root of host plant   Plant provides nutrients to fungi   Many plants would not be successful without these fungal associations           (members of Zygomycota and Basidiomycota)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: STRUCTURE CELL WALL composed of CHITIN Fungal Body made of threadlike FILAMENTS = HYPHAE Hyphae form mass called MYCELIUM H yphae divided into cells by walls (SEPTA) In some fungi, hyphae may not have septa = MULTINUCLEATE cells Mitosis of nucleus occurs without cytokinesis CAN BE BENEFICIAL Drugs -: penicillin; other antibiotics Food- mushrooms, truffles, morels yeast makes bread/beer/champagne CAN CAUSE DISEASE PLANTS: rust and smut REPRODUCTION ASEXUAL BUDDING in yeast Mycelium can make HAPLOID (1n) SPORES by mitosis spread by wind or water; grow into new mycelium SEXUAL Hyphae/nuclei from two different mating strains fuse DIPLOID (2n) ZYGOTE undergoes MEIOSIS to make HAPLOID (1n) SPORES SPORES produced BOTH sexually and asexua lly! ANIMALS: ringworm, athlete’s foot...
View Full Document

This note was uploaded on 02/14/2012 for the course BIO 151 taught by Professor Grinblat during the Fall '08 term at University of Wisconsin.

Page1 / 2

Chapter 31 - Fungi Notes - STRUCTURE CELL WALL composed of...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online