Chapter 25 fungi
Download
1 / 38

Chapter 25 Fungi - PowerPoint PPT Presentation


  • 111 Views
  • Uploaded on

Chapter 25 Fungi. Fig. 31-1. Fig. 31-2. Reproductive structure. Hyphae. Spore-producing structures. 20 µm. Mycelium. Fig. 31-3. Cell wall. Cell wall. Nuclei. Pore. Septum. Nuclei. (a) Septate hypha. (b) Coenocytic hypha. Fig. 31-5-3. Key. Heterokaryotic stage. Haploid ( n ).

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Chapter 25 Fungi' - lok


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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript


Fig. 31-2

Reproductive structure

Hyphae

Spore-producing

structures

20 µm

Mycelium


Fig. 31-3

Cell wall

Cell wall

Nuclei

Pore

Septum

Nuclei

(a) Septate hypha

(b) Coenocytic hypha


Fig. 31-5-3

Key

Heterokaryotic

stage

Haploid (n)

Heterokaryotic

(unfused nuclei from

different parents)

PLASMOGAMY

(fusion of cytoplasm)

Diploid (2n)

KARYOGAMY

(fusion of nuclei)

Spore-producing

structures

Zygote

SEXUAL

REPRODUCTION

Spores

ASEXUAL

REPRODUCTION

Mycelium

MEIOSIS

GERMINATION

GERMINATION

Spores


Fig. 31-6

2.5 µm


Fig. 31-7

10 µm

Parent

cell

Bud


Fig. 31-11

Hyphae

25 µm

Chytrids (1,000 species)

Zygomycetes (1,000 species)

Fungal hypha

Glomeromycetes (160 species)

Ascomycetes (65,000 species)

Basidiomycetes (30,000 species)


Fig. 31-13-4

Key

Haploid (n)

Heterokaryotic (n + n)

Diploid (2n)

PLASMOGAMY

Mating

type (+)

Gametangia with

haploid nuclei

Mating

type (–)

100 µm

Young

zygosporangium

(heterokaryotic)

Rhizopus

growing

on bread

SEXUAL

REPRODUCTION

Dispersal and

germination

Zygosporangium

KARYOGAMY

Sporangia

Spores

Diploid

nuclei

Sporangium

ASEXUAL

REPRODUCTION

MEIOSIS

Dispersal and

germination

Mycelium

50 µm


Glomeromycetes
Glomeromycetes

  • The glomeromycetes (phylum Glomeromycota) were once considered zygomycetes

  • They are now classified in a separate clade

  • Glomeromycetes form arbuscular mycorrhizae


Fig. 31-15

2.5 µm


Fig. 31-16

Morchella esculenta,

the tasty morel

Tuber melanosporum, a truffle


Fig. 31-17-4

Conidia;

mating type (–)

Key

Haploid spores (conidia)

Haploid (n)

Dikaryotic (n + n)

Diploid (2n)

Dispersal

Germination

Mating

type (+)

ASEXUAL

REPRODUCTION

Hypha

PLASMOGAMY

Ascus

(dikaryotic)

Conidiophore

Dikaryotic

hyphae

Mycelia

Mycelium

SEXUAL

REPRODUCTION

Germination

KARYOGAMY

Dispersal

Diploid nucleus

(zygote)

Eight

ascospores

Asci

Ascocarp

Four

haploid

nuclei

MEIOSIS


Fig. 31-18a

Maiden veil fungus

(Dictyphora), a

fungus with an odor like rotting meat


Fig. 31-18b

Puffballs emitting

spores


Fig. 31-18c

Shelf fungi, important

decomposers of wood


Fig. 31-19-4

Dikaryotic mycelium

PLASMOGAMY

Haploid mycelia

Mating

type (–)

Mating

type (+)

Gills lined

with basidia

Haploid mycelia

SEXUAL

REPRODUCTION

Basidiocarp

(n+n)

Dispersal and

germination

Basidiospores

(n)

Basidium with

four basidiospores

Basidia

(n+n)

Basidium

Basidium containing

four haploid nuclei

KARYOGAMY

MEIOSIS

Key

Haploid (n)

Dikaryotic (n+n)

Diploid

nuclei

Diploid (2n)

Basidiospore

1 µm



Fig. 31-23a

A fruticose (shrublike) lichen


Fig. 31-23b

Crustose

(encrusting)

lichens


Fig. 31-23c

A foliose

(leaflike)

lichen


Fig. 31-24

Ascocarp of fungus

Soredia

Fungal

hyphae

Algal

layer

Algal cell

20 µm

Fungal hyphae


Fig. 31-25a

(a) Corn smut on corn


Fig. 31-25b

(b) Tar spot fungus on

maple leaves


Fig. 31-25c

(c) Ergots on rye


Fig. 31-26

Staphylococcus

Penicillium

Zone of

inhibited

growth







You should now be able to
You should now be able to:

  • List the characteristics that distinguish fungi from other multicellular kingdoms

    2. Describe the life cycles of Rhizopus stolonifer and Neurospora crassa

    3. Distinguish among zygomycetes, ascomycetes, and basidiomycetes

    4. Describe some of the roles of fungi in ecosystems, lichens, animal-fungi mutualistic symbioses, food production, and medicine and as pathogens


ad