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

Lab 6
Various “Protista”
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
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
Dictyostelium
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
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.
D
Physarum plasmodium
Myxomycota
D
Stemonitis
Myxomycota
A
Stemonitis
Myxomycota
D
Arcyria
Myxomycota
D
Arcyria
Myxomycota
D
Dictydium
Myxomycota
A
Dictydium
Myxomycota
D
Lamproderma
Myxomycota
D
Lamproderma
Myxomycota
D
Physarum
Myxomycota
A
Lycogala
Myxomycota
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)
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
U
Euglena
Euglenophyta
D
Euglena
Euglenophyta
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
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
A
Peridinium
Dinophyta
A
Noctiluca
Dinophyta
A
Ceratium
Dinophyta
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
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
A
Polysiphonia tetrasporophyte
Rhodophyta
A
Polysiphonia male gametophyte
Rhodophyta
A
Polysiphonia cystocarp
Rhodophyta
D
Polysiphonia
Rhodophyta
D
Various red algae
Rhodophyta
D
carrageenan
Rhodophyta
D
agar
Rhodophyta
D
nori
Rhodophyta