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