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ALGAE
ALGAEEukaryotic organisms
Thallophytes- Roots = Rhizoids- Stem = Cauloid - Leaves = phyloid
Color of Algae stems from the pigment
AlgaeSimple organisms
Means of feeding:autotrophs
Cell Wall:- cellulose - murein: sugars + aminoacids (only found in algae and bacteria)
Division and multiplication
Nostoc
IMPORTANCE
Synthesize organic matter that is used as food by other organisms
During decomposition release toxins
Fix the nitrogen from the atmosphere
Red Algae (Rhodophyta)
- One of the oldest groups of eukaryotic algae- phycoerythrin – the red pigmenti- Iodine
Division and multiplication
- Around 5,000 species- Submerged in water- Absorb blue and green light – photosynthesis
Batrachospermum – freshwater
Importance
The 5 Kingdoms of living organisms
Brown Algae (Phaeophyta)
• Majority live in marine environments
• Fucoxanthin – pigment, masks chlorophyll
• Variety of shapes
• Size: up to 70 meters
• Around 1500 – 2000 species
Division and multiplication
Importance
Diatoms (Bacillariophyta)
• The most widespread algae
• Yellow to brown: chlorophyll, carotenoid fucoxanthin
• 100,000 species
• Live in fresh and salty waters, rocks, ice, etc.
Silica cell wall
Importance
Green Algae (Chlorophyta)
• 7,000 - 12,000 species
• Pigmentet: chlorophyll, carotene, xanthophyll
• Double-layer cell wall
• Autotroph; storage of starch
Live in fresh and salty waters as well as land (including deserts)
Symbiosis: Algae + Fungi = Lichens
Division and multiplication
Importance and Uses