Plantlike and Fungilike Protists

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Plant-like and Fungi-like Protists
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Plant-like Protists

• Definition Most are unicellular
  photosynthetic organisms, some are multicellular,
  many are highly motile (get around)
• Classification Type of photosynthetic pigments

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Unicellular Plant-like Protists

• Euglenophytes Plant-like protist (can also live
  as heterotrophs), 2 flagella, no cell wall
• Found in ponds lakes
• Eyespot to sense light
• Reproduce by binary fission
• Use contractile vacuole to expell water
• Pellicle (cell membrane) is tough, flexible, but
  no cell wall

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Euglena
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Euglena
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2. Dinoflagellates

• 50 Photosynthetic, 50 Heterotrophic
• Have 2 flagella
• Luminescent
• Have DNA, but its not tightly bound with histones

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Dinoflagellates
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Dinoflagellate
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Dinoflagellate
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Chrysophytes

• Yellow-green golden brown algae
• Some contain pectin rather than cellulose
• Store food as oil instead of starch
• Reproduce asexually sexually
• Most are solitary, but some are colonial

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Diatoms

• Walls are rich in silicon (found in glass)
• May have a two-part structure
• Dont easily decompose (used in cleansers and
  toothpastes think gritty feeling)

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Diatom
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Diatoms
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Multicellular Algae

• Red algae
• a. Phylum Rhodophyta
• b. Chlorophyll Chlorophyll a phycobilin
  (reddish pigment)
• c. Habitat Deep water, polar to tropics

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Red algae
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Red Algae
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Multicellular Algae

• 2. Brown Algae
• a. Phylum Phaeophyta
• b. Chlorophyll A C, fucoxanthan
• c. Habitat most are marine, found in cool,
  shallow coastal waters of temperate or arctic
  areas

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Brown Algae
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Multicellular Algae

• 3. Green Algae
• a. Phylum Chlorophyta (cellulose cell walls,
  chlorophyll a b, store food as starch) VERY
  MUCH LIKE PLANTS
• b. Chlorophyll a b
• c. Habitat fresh saltwater, some areas on
  land, most are unicellular

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Green Algae
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Green Algae
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Human Uses for Algae

• a. Produces oxygen, responsible for ½ of ALL
  photosynthesis on Earth
• b. Used to make medicines, hi in vitamin C and
  iron
• c. Used for foods such as ice cream, pancake
  syrup, eggnogs, and agar

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Fungi-like Protists

• Definition
• Heterotrophs (absorb nutrients from dead or
  decaying organic matter), have centrioles, lack
  chitin in cell walls (chitin is found in TRUE
  fungi)
• Examples
• Slime molds
• Water molds

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Slime Molds
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Water Mold (White Patch)