Kingdom Protista: Algae and Heterotrophic Protists Chapter 15

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1 Kingdom Protista: Algae and Heterotrophic Protists Chapter 15

2 Heterotrophic Phyla Oomycota- water molds.
Myxomycota- plasmodial slime molds. Dictyosteliomycota- cellular slime molds.

3 Oomycota- water molds Characteristics
Unicellular, coenocytic and filamentous. Saprophytic and parasitic. Food reserve- glycogen. Eukaryotic nucleus. Zoospores- 1 tinsel and 1 whiplash. Cell wall cellulose/cellulose-like. Habitat- marine, freshwater, terrestrial. 700 species. Examples- Saprolegnia and Phytophthora.

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5 Phytophthora- sudden oak disease, Ireland potato famine, crop destruction.

6 Myxomycota- plasmodial slime molds
Characteristics Streaming protoplasm. Saprophytic and engulf bacteria, yeast, fungal spores. Food reserve- glycogen. Eukaryotic nucleus. Gametes- 2 unequal, apical, whiplash. No cell wall. Habitat- terrestrial. 700 species. Example- Physarum.

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9 Dictyosteliomycota- cellular slime molds
Characteristics Amoeba-like cells that form slugs. Engulf bacteria. Food reserve- glycogen. Eukaryotic nucleus. Flagella- none. Cell wall cellulose. Habitat- terrestrial. 50 species. Examples- Dictyostelium.

10 Dictyostelium- cellular slime mold

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12 Dictyostelium

13 Photosynthetic Phyla (the algae)
Myzozoa- dinoflagellates. Euglenozoa- euglenoids. Cryptophyta- cryptomonads. Haptophyta- haptophytes. Chlorophyta- green algae. Rhodophyta- red algae. Heterokontophyta- heterokont algae. Phaeophyceae- brown algae. Chrysophyceae- golden-brown algae. Bacillariophyceae- diatoms.

14 Myzozoa- dinoflagellates
Characteristics Unicellular, colonal. Chlorophylls A and C, peridinin. Food reserve- starch in cytoplasm. Thylakoids in 3. Mesokaryotic nucleus. Flagella- 1 transverse and 1 longitudinal. Cell wall with cellulose in thecal plates. Habitat- marine and freshwater. 4,000 species. Examples- Ceratium, Peridinium, Dinophysis, Alexandrium, Pfiesteria.

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18 Pfiesteria piscicida

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20 Euglenozoa

21 Euglenozoa- euglenoids
Characteristics Unicellular. Chlorophylls A and B, carotenoids. Food reserve- paramylon in cytoplasm. Thylakoids 2-3. Mesokaryotic nucleus. 2 unequal flagella, long one with hairs. No cell wall, proteinaceous pellicle. Eyespot. Habitat- marine and freshwater; puddles, ditches, ponds, streams, lakes, rivers. 1,000 species. Example- Euglena.