1 / 21

Fungi

Fungi. Eukaryotic heterotrophs that have cell walls Cell walls – made of chitin Food Intake Digest food outside body and absorb it Feed by absorbing nutrients from decaying matter Live as parasites absorbing nutrients from bodies of hosts. Structure and Function.

marged
Download Presentation

Fungi

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Fungi • Eukaryotic heterotrophs that have cell walls • Cell walls – made of chitin Food Intake • Digest food outside body and absorb it • Feed by absorbing nutrients from decaying matter • Live as parasites absorbing nutrients from bodies of hosts

  2. Structure and Function • Multicellular (besides yeast) • Composed of Hyphae- thin filaments • Lack cross walls- multinucleated • Cross walls- cells contain one or two nuclei

  3. Mycelium- multicellular fungi are composed of many hyphae tangled together in a thick mass • Large surface area- more area to absorb food • Fruiting body- reproductive structure

  4. Hyphae- 3 types • Rhizoids- anchor fungus • Stolons- on surface give rise to mating types (+ -) • Sporangiophores- give rise to tips of sporangia which produce spores

  5. Fairy Ring http://www.dnatube.com/video/1438/Bread-Mold

  6. Reproduction • Asexually- • Hyphae break off and begin to grow on their own • Produce spores- scatter and grow on their own • Sporangia- structures producing spores • Sporangiophores- specialized hyphae containing sporangia

  7. Sexually- two types + and – (no male/female) • Hyphae of opposite types meet, nuclei fuse together • Nuclei form diploid zygote

  8. Spores spread- • Wind • Animals • http://www.dnatube.com/video/1437/Mushroom

  9. Fungus Phylum • Zygomycota- common molds • Ascomycota- sac fungi • Basidiomycota- club fungi • Deuteromycota- imperfect fungi

  10. Fungi= Heterotroph • Saprobes- obtain food from decaying matter • Parasites- obtain food from living directly on organisms • Symbionts- live mutually with other organisms • Carnivorous- Ex: mushroom that traps worms

  11. Fungi= Decomposers • Break down wastes • Promote recycling nutrients in environment

  12. Fungi= Parasite • Cause serious plant and animal disease • Plants • Corn smut • Mildews • Wheat rust • 15% of crops lost to fungus in temperate regions • 50% or up in tropical regions

  13. Human diseases • Athletes foot • Yeast infection

  14. Animal • Cordyceps- infect insects • Chitrid- affects frogs

  15. Fungus=Symbiotic • Lichens- fungus/cyanobacteria or green algae • organism- provides energy • Fungus- provides water and minerals, protection

  16. Mycorrhizae- fungus/plants • Plant roots • 80% of plant species form mycorrhizae • Fungus- absorbs water/nutrients/release enzymes that free nutrients in soil • Plants- provide energy

  17. Slime Mold/Fungus

More Related