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Download Plantlike Protist: Unicellular Algae
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Plantlike Protist: Unicellular Algae Ms. Sheldon Microbiology OVERVIEW • Green Pigment called Chlorophyll for photosynthesis • Motile • ALGAE • Debate about if they should be in the plant kingdom CHLOROPHYLL and ACCESSORY PIGMENTS • Light is trapped by Chlorophyll and accessory pigments • Chlorophyll a – the most effective • Chlorophyll b and c absorb other wavelengths of light • Accessory Pigments – capture light at other wavelengths than chlorophyll EUGLENOPHYTA • • • • • 1,000 species Unicellular flagellated euglenoids Can be heterotrophic absorbing decaying matter Chlorophyll and photosynthetic – plant like No cell wall and two flagella and pellicle (cell membrane that is folded like a ribbon • Freshwater, crawl through mud • Asexual reproduction with binary fission • Eyespot – reddish pigments to find sunlight CHRYSOPHYTA • • • • 850 species Golden algae (yellow-green) Freshwater Cysts are formed to survive unfavorable conditions • Two flagella, pectin in cell walls and sometimes cellulose as well • Shade of yellow of brown carotenoids • Store energy as oil and help in petroleum formations DIATOMS BACILLARIOPHYTA • • • • • • • 11,500 species Freshwater and Marine Shells or Valve made of silicon dioxide Centric diatoms – circular shells Pennate diatoms – rectangular shells Phytoplankton – release oxygen Diatomaceous earth - shells and is used in detergents, paint remover, fertilizers, insulators and some toothpaste PYRROPHYTA DINOFLAGELLATES • • • • • • • • • 1,100 species Unicellular ½ Photosynthetic and 1/2 heterotrophic Yellowish green to brown color Two flagella Made of cellulose Bioluminescence – light – Fire Plant Color producing toxins – red tide This is what makes them dangerous to humans, oysters and such eat them and then we eat them ECOLOGY • Base of the food chain • Phytoplankton = surface of ocean living organisms, food source • Algal Blooms = sewage is a great food source, grow in population and deplete the nutrients, can be toxin producing (red tide)
