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Lab 6

Lab 6. Various “Protista”. Dictyosteliomycota. Common name : Cellular slime molds Synonyms : Acrasiomycota (in part) Mode of nutrition : Heterotrophic: ingestive Habitat : Terrestrial: moist decaying vegetation

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Lab 6

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  1. Lab 6 Various “Protista”

  2. Dictyosteliomycota • Common name: Cellular slime molds • Synonyms: Acrasiomycota (in part) • Mode of nutrition: Heterotrophic: ingestive • Habitat: Terrestrial: moist decaying vegetation • Growth habit: Unicellular myxamoebae (ingestive cells), multicellular dispersal structure • Cell wall: None in myxamoebae, cellulose in sporangium

  3. Dictyosteliomycota • Undulipodia (“flagella”): None • Food storage: Glycogen • Clonal reproduction: Mitosis of myxamoebae; production of aplanospores for dispersal • Sexual reproduction: Rare and poorly known • Representative genera: Dictyostelium • Recognized by: “slugs”, individual (not grouped) stalked sporangia

  4. Dictyostelium

  5. Myxomycota • Common name: Plasmodial slime molds • Synonyms: Mycetozoa • Mode of nutrition: Heterotrophic: ingestive • Habitat: Terrestrial: moist decaying vegetation • Growth habit: Multinucleate single-cell plasmodium • Cell wall: None • Undulipodia (“flagella”): One or two whiplash on aquatic haploid uninucleate cells; otherwise none

  6. Myxomycota • Food storage: Glycogen • Clonal reproduction: None • Sexual reproduction: Diploid phase resembles diploid dominant; haploid phase resembles unicellular • Representative genera: Arcyria, Dictydium, Physarum, Stemonitis • Recognized by: Plasmodium; meiosporangia often clustered.

  7. DPhysarum plasmodium Myxomycota

  8. DStemonitis Myxomycota

  9. AStemonitis Myxomycota

  10. DArcyria Myxomycota

  11. DArcyria Myxomycota

  12. DDictydium Myxomycota

  13. ADictydium Myxomycota

  14. DLamproderma Myxomycota

  15. DLamproderma Myxomycota

  16. DPhysarum Myxomycota

  17. ALycogala Myxomycota

  18. Euglenophyta • Common name: Euglenas • Synonyms: None • Mode of nutrition: Autotrophic; green chloroplasts (secondary), or heterotrophic by ingestion • Habitat: Freshwater • Growth habit: Unicellular • Cell wall: None (a proteinaceous pellicle beneath the plasma membrane provides stiffness)

  19. Euglenophyta • Undulipodia (“flagella”): Whiplash; one long for swimming, one short, confined to the vacuole • Food storage: Paramylon • Clonal reproduction: Mitosis by unicells • Sexual reproduction: None known • Representative genera: Euglena, Phacus • Recognized by: Green but no cell wall, eyespot often prominent

  20. UEuglena Euglenophyta

  21. DEuglena Euglenophyta

  22. Dinophyta • Common name: Dinoflagellates • Synonyms: Pyrrhophyta • Mode of nutrition: Autotrophic; brown chloroplasts (secondary), or heterotrophic by ingestion • Habitat: Marine, freshwater • Growth habit: Unicellular • Cell wall: Cellulose or none

  23. Dinophyta • Undulipodia (“flagella”): Ordinarily two whiplash, one in equatorial groove and one in longitudinal groove • Food storage: Chrysolaminarin • Clonal reproduction: Mitosis by unicells • Sexual reproduction: Poorly known in many species, some with complex sexual cycles • Representative genera: Ceratium, Gonyaulax, Noctiluca, Peridinium, Pfiesteria • Recognized by: Grooves for flagella

  24. APeridinium Dinophyta

  25. ANoctiluca Dinophyta

  26. ACeratium Dinophyta

  27. Rhodophyta • Common name: Red algae • Synonyms: None • Mode of nutrition: Autotrophic; red chloroplasts • Habitat: Marine, freshwater • Growth habit: Multicellular; filamentous or plectenchyma; multicellular crusts and films, rarely unicellular. • Cell wall: Cellulose, galactans such as agar and carrageenan

  28. Rhodophyta • Undulipodia (“flagella”): None (no basal bodies) • Food storage: Floridean starch • Clonal reproduction: aplanospores • Sexual reproduction: Isomorphic alternation of generations with interpolated carposporophyte phase, oogamous • Representative genera: Chondrus, Corallina, Polysiphonia, Porphyra • Recognized by: Red plants; no flagella; cystocarps; tetraspores

  29. APolysiphonia tetrasporophyte Rhodophyta

  30. APolysiphonia male gametophyte Rhodophyta

  31. APolysiphonia cystocarp Rhodophyta

  32. DPolysiphonia Rhodophyta

  33. D Various red algae Rhodophyta

  34. D carrageenan Rhodophyta

  35. D agar Rhodophyta

  36. D nori Rhodophyta

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