Ch. 17-18 Algae Flashcards
Cyanobacteria
- Bacteria that is photosynthetic
- Prokaryotes
Cyanobacteria Pigments
A. Chlorophyll a,d,f
B. Phycobilins
- Phycocyanin (blue)
- Phycoerythrin (red)
Cyanobacteria Description
- Photosynthesize - Produce O2
- May fix N2 in heterocyst
- Recombination but no mitosis, meiosis
- NO flagella but some move
Examples of unpigmented Bacteria
Staphylococcus
Spirillum
Streptococcus
Ecology of Cyanobacteria
a. Ponds
b. Ocean (e.g. Synechococcus) common cyanobacteria that lives in the ocean
c. Hot Water - precipitates calcium carbonate
d. Stromatolites
e. Algal blooms: Nostoc, Anabaena, Microcystis
f. Fertilize rice fields
g. Symbionts
Symbionts (Symbiotic Cyanobacteria)
Lichen
anemone
Sponges
Snails
Cyads
Azola Ferns
Prochlorophytes
- they do not have mitochondria but are photosynthetic
- have chlorophyll a & b but no phycobilins or phycocianbs
Phylum Chlorophyta
Green Algae
Phylum Chlorophyta description
a. unicells, filaments, sheets, colonies, spheres, stars
b. Fresh ??
Unicellular Phylum Chlorophyta
- Motile: Chlamydomonas, Chorella
- Cup shaped chloroplast
- Desmids - star or crescent shaped
- Acetabularia (Mermades wine glass)
Filamentus Phylum Chlorophyta
- Spirogyra - reproduction via conjugation
- Oedogonium - a great food source for the future.
- Hydrodictyon - makes a network
Colonial (multicellular) Phylum Chlorophyta
- Ulva
- Volvox - ball of several hundred cells
Ceonocytic (multinuclear and one cell) Phylum Chlorophyta
- Codium
Characteristics of Phylum Chromaphyta in common with
a. Chlorophyll a + carotenoids, xanthophylls (Fucoxanthin)
b. Store food energy as oil or carbohydrate laminarin
c. Hairlike projection on flagellum
Family Xanthophyceae
Yellow-Green Algae
Description Family Xanthophyceae
- Freshwater unicells
- Flagellae point opposite directions