Chapter  21 Fungi
What are Fungi? <ul><li>The way in which Fungi grow from the ground once led scientists to classify them as nonphotosynthe...
Chitin   <ul><li>A complex carbohydrate that makes up the cell walls of fungi </li></ul>
Fungi Nutrition <ul><li>Remember that heterotrophs depend on other organisms for food </li></ul><ul><li>Unlike animals, fu...
Structure and Function of Fungi <ul><li>All fungi are multicellular with the exception of yeast </li></ul><ul><li>Multicel...
Structure and Function of Fungi
Fungus Structure <ul><li>The bodies of multicellular fungi are composed of many hyphae tangled together into a thick mass ...
Fungus Structure
Fruiting body   <ul><li>The reproductive structure growing from the mycelium in the soil that you recognize as a mushroom ...
Fungi reproduction <ul><li>Most fungi reproduce both asexually and sexually </li></ul>
Spore   <ul><li>A reproductive cell that is capable of growing into a new organism by mitosis alone </li></ul><ul><li>This...
Fungal spore
Fungi reproduction <ul><li>Sexual reproduction involves two different mating types (+ and -) </li></ul><ul><li>When two hy...
Types of fungi
zygomycetes
Sac Fungi
Yeast
Club Fungi
Imperfect fungi
Ecology of Fungi <ul><li>Fungi have been around since life first moved onto land </li></ul><ul><li>Paleontologists think t...
Edible and Inedible Mushrooms <ul><li>Many types of mushrooms are considered delicious  </li></ul><ul><li>Although wild mu...
All Fungi Are Heterotrophs <ul><li>Many are saprobes </li></ul><ul><li>Others are parasites </li></ul><ul><li>Others are s...
Saprobes  <ul><li>Organisms that obtain food from decaying organic matter </li></ul>
Carnivorous Fungi <ul><li>Pleurotus ostreatus </li></ul>
Fungi as Decomposers <ul><li>Fungi play an essential role in maintaining equilibrium in nearly every ecosystem </li></ul><...
Fungi as Parasites <ul><li>As useful as many fungi are others can infect both animals and plants and cause diseases </li><...
Cordyceps
Symbiotic Relationships <ul><li>Some fungi form symbiotic relationships in which both partners benefit </li></ul>
Lichens   <ul><li>Symbiotic association between a fungus and a photosynthetic organism </li></ul>
 
 
Lichens <ul><li>The algae or cyanobacteria -  Carries out photosynthesis providing the fungus with food </li></ul><ul><li>...
Mycorrhizae   <ul><li>Symbiotic relationship between plant roots and fungi </li></ul><ul><li>Fungi allow plants to –  abso...
 
 
Upcoming SlideShare
Loading in …5
×

Biology - Chp 21 - Fungi - PowerPoint

21,343 views

Published on

Published in: Education, Technology
5 Comments
15 Likes
Statistics
Notes
No Downloads
Views
Total views
21,343
On SlideShare
0
From Embeds
0
Number of Embeds
26
Actions
Shares
0
Downloads
995
Comments
5
Likes
15
Embeds 0
No embeds

No notes for slide

Biology - Chp 21 - Fungi - PowerPoint

  1. 1. Chapter 21 Fungi
  2. 2. What are Fungi? <ul><li>The way in which Fungi grow from the ground once led scientists to classify them as nonphotosynthetic plants </li></ul><ul><li>However, they are not plants at all, fungi are very different </li></ul><ul><li>Fungi are eukaryotic heterotrophs that have cell walls </li></ul>
  3. 3. Chitin <ul><li>A complex carbohydrate that makes up the cell walls of fungi </li></ul>
  4. 4. Fungi Nutrition <ul><li>Remember that heterotrophs depend on other organisms for food </li></ul><ul><li>Unlike animals, fungi do not ingest their food </li></ul><ul><li>Instead they digest food outside their bodies and then absorb it </li></ul><ul><li>Many feed by absorbing nutrients from decaying matter in the soil (decomposers) </li></ul><ul><li>Others live as parasites, absorbing nutrients from their hosts </li></ul>
  5. 5. Structure and Function of Fungi <ul><li>All fungi are multicellular with the exception of yeast </li></ul><ul><li>Multicellular fungi are composed of thin filaments called hyphae </li></ul>
  6. 6. Structure and Function of Fungi
  7. 7. Fungus Structure <ul><li>The bodies of multicellular fungi are composed of many hyphae tangled together into a thick mass called a mycelium </li></ul>
  8. 8. Fungus Structure
  9. 9. Fruiting body <ul><li>The reproductive structure growing from the mycelium in the soil that you recognize as a mushroom </li></ul>
  10. 10. Fungi reproduction <ul><li>Most fungi reproduce both asexually and sexually </li></ul>
  11. 11. Spore <ul><li>A reproductive cell that is capable of growing into a new organism by mitosis alone </li></ul><ul><li>This is how fungi spread </li></ul>
  12. 12. Fungal spore
  13. 13. Fungi reproduction <ul><li>Sexual reproduction involves two different mating types (+ and -) </li></ul><ul><li>When two hyphae of opposite mating types meet, their nuclei fuse together </li></ul>
  14. 14. Types of fungi
  15. 15. zygomycetes
  16. 16. Sac Fungi
  17. 17. Yeast
  18. 18. Club Fungi
  19. 19. Imperfect fungi
  20. 20. Ecology of Fungi <ul><li>Fungi have been around since life first moved onto land </li></ul><ul><li>Paleontologists think that fungi helped early plants to obtain nutrients from the ground </li></ul><ul><li>Their early appearance suggests that fungi may have been essential to plants successful colonization of the land </li></ul><ul><li>Overtime, fungi have become an important part of virtually all ecosystems </li></ul>
  21. 21. Edible and Inedible Mushrooms <ul><li>Many types of mushrooms are considered delicious </li></ul><ul><li>Although wild mushrooms are edible, many are poisonous </li></ul><ul><li>You should never pick or eat mushrooms in the wild </li></ul><ul><li>Leave mushroom gathering to the experts </li></ul>
  22. 22. All Fungi Are Heterotrophs <ul><li>Many are saprobes </li></ul><ul><li>Others are parasites </li></ul><ul><li>Others are symbionts that live in close and mutually beneficial association with other species </li></ul>
  23. 23. Saprobes <ul><li>Organisms that obtain food from decaying organic matter </li></ul>
  24. 24. Carnivorous Fungi <ul><li>Pleurotus ostreatus </li></ul>
  25. 25. Fungi as Decomposers <ul><li>Fungi play an essential role in maintaining equilibrium in nearly every ecosystem </li></ul><ul><li>They recycle nutrients by breaking down the bodies and wastes of other organisms by releasing digestive enzymes </li></ul>
  26. 26. Fungi as Parasites <ul><li>As useful as many fungi are others can infect both animals and plants and cause diseases </li></ul><ul><li>Ex.) Wheat rust, athelets foot, Candida, Cordyceps </li></ul>
  27. 27. Cordyceps
  28. 28. Symbiotic Relationships <ul><li>Some fungi form symbiotic relationships in which both partners benefit </li></ul>
  29. 29. Lichens <ul><li>Symbiotic association between a fungus and a photosynthetic organism </li></ul>
  30. 32. Lichens <ul><li>The algae or cyanobacteria - Carries out photosynthesis providing the fungus with food </li></ul><ul><li>The fungus provides the algae or bacteria with – water and minerals that it collects and also protects the delicate algae cell </li></ul><ul><li>Lichens are often the first organisms to enter barren environments </li></ul>
  31. 33. Mycorrhizae <ul><li>Symbiotic relationship between plant roots and fungi </li></ul><ul><li>Fungi allow plants to – absorb more water and minerals </li></ul><ul><li>Fungi also release enzymes that – free nutrients into the soil </li></ul><ul><li>Plants provide fungi with – the products of photosynthesis </li></ul>

×