1. Phylum Myxomycota Phylum Acrasiomycota Phylum Oomycota
FUNGUS-LIKE PROTISTS
Phylum Myxomycota
Phylum Acrasiomycota
Phylum Oomycota

2. CHARACTERISTICS why fungus-like? with centrioles
appearance
mode of nutrition
with centrioles
no chitin in cell walls
non-photosynthetic
2-stage life cycle
spore-bearing mold-like stage
free-living amoeba-like stage
Stemonitis fusca
Comatricha typhoides

3. Dominant state near rich sources of food
(phagocytic)
Fruiting body
Spore-bearing structure
Cells aggregate
into a slimy mass
when food is scarce
and moves to a better location

4. SLIME MOLDS Phylum Acrasiomycota Phylum Myxomycota
Cellular slime molds
Phylum Myxomycota
Acellular slime molds

5. Phylum Myxomycota Acellular or plasmodial slime molds
plasmodium
large cytoplasmic mass (multinucleate)
feeding stage
unfavorable conditions: “fruiting”
sporangia spring up from plasmodium
meiosis  haploid spores flagellated gametes →diploid zygote (sexual reproduction) →*diploid amoeboid cells
e.g. Physarum

6. http://home. sandiego. edu/~gmorse/2009BIOL221/Study_guide2/plasmodial

7. Physarum polycephalum

8. Comatricha typhoides

9. Lycolaga epinendrum “wolf’s milk”

10. Stemonitis splendens “chocolate tube slime”

11. Arcyris denudata “carnival candy slime”

12. Brefeldia maxima “tapioca slime”

13. Tubifera ferruginosa “red raspberry slime”

14. http://xkcd. com/877/ , http://www. uknature. co. uk/F. septica,

15. Phylum Acrasiomycota cellular slime molds
pseudoplasmodium
separated by cell membranes
cell aggregation
slug-like form
migrates to form fruiting body
spores by mitosis
e.g. Dictyostelium discoideum

17. Phylum Oomycota water molds/downy mildew
cellulosic cell wall
live on organic matter in water, plant parasites on land
hyphae  finely-branched single-celled filaments
coenocytic/aseptate  no walls between cells
motile spores
Phytophthora infestans 

19. Significance decomposers food source of other organisms
parasites of plants (grapes, tomatoes, potatoes) and animals
used to plan routes (shortest distance)
rich areas for biological study