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Introduction to Fungi: Evolution, Characteristics and Life Cycle

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Introduction to Fungi: Evolution, Characteristics and Life Cycle Author: Bernice Speer Last modified by: Bernice Speer Created Date: 9/27/2008 8:36:07 PM – PowerPoint PPT presentation

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Title: Introduction to Fungi: Evolution, Characteristics and Life Cycle


1
Introduction to FungiEvolution, Characteristics
and Life Cycle
  • BIOL 1407

2
Fungi
  • http//www.poetv.com/video.php?vid16788
  • Photo Credit Field Biology Student, Enchanted
    Rock Field Trip 2005

3
Characteristics of Fungi
  • Absorptive heterotrophs
  • Cell walls made of chitin
  • No flagella (most)
  • Photo Credit M. Hirsch, BIOL 1407 Bastrop Field
    Trip 2004

4
Fungal Hyphae
  • Hyphae
  • Thread of cells
  • One cell thick
  • High surface area to volume ratio

5
Fungal Hyphae
  • Hyphae
  • Absorb water, ions, nutrients
  • Gas exchange
  • Waste disposal

6
Hyphal Types
  • Septate
  • Coenocytic

7
Fungal Body
  • Mycelium
  • Loosely woven mat of hyphae
  • Feeding structure

8
Reproductive Structures
  • Made of hyphae
  • Different shapes for different fungal groups

9
Reproductive Structures
  • Make spores, either by mitosis or meiosis
  • Some are called fruiting bodies

10
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11
Heterokaryon
  • Formed after plasmogamy
  • n n
  • Unfused nuclei from both parents

12
Dikaryon
  • Special type of heterokaryon
  • Long-lasting
  • As cells divide, cells retain n n

13
Fungal Lifestyles
  • Saprobes Decomposers

14
Fungal Lifestyles
  • Parasites

15
Fungal Lifestyles
  • Predators

16
Fungal Lifestyles
  • Mutualists Mycorrhizae

17
Fungal Lifestyles
  • Mutualists Lichens
  • Photo Credit Field Biology Student, 360
    Overlook 2005

18
(No Transcript)
19
(No Transcript)
20
Types of Lichens
  • Crustose

21
Types of Lichens
  • Foliose
  • Photo Credit Field Biology Student, 360
    Overlook 2005

22
Types of Lichens
  • Fruticose
  • Photo Credit M. Hirsch, BIOL 1407 Bastrop Field
    Trip 2004

23
(No Transcript)
24
(No Transcript)
25
Evolution of Fungi
  • Earliest fossil fungi
  • Fungal spores
  • 460 million years old

26
Opisthokonts
  • Sister taxon to Fungi Nucleariids

27
(No Transcript)
28
The End
  • Unless otherwise specified, all images in this
    presentation came from
  • Campbell, et al. 2008. Biology, 8th ed.
    Pearson Benjamin Cummings.
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