Exam 4 Chapter 12 Algae

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Thallus:

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the entire vegetative structre or body of a fungus, lichen, or alga

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Holdfasts

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The branched base of an algal stripe.they anchor the alga to a rock; commonly called seaweeds

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Stipes:

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A stemlike supporting structure of multicellular algae and basidiomycetes.

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Blades:

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A flat leaflike structure of multicellular algae

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Chlorophyta:

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Green algae; has cellulose, uniclellular /multi, Chloryphll a & b, Sexual repro., storage material is glucose polymer, ancestors of terrestrial plants.

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Euglenophyta:

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euglenids; found in fresh water; unicellular flagellated organisms

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Chrysophyta:

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golden brown/ diatoms; pactin and silica cell wall; produce oil by photosynthesis

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Diatoms:

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“jewels of the sea”;variety of shapes; single-celled algae that can be found in all waters, unicellular,have pectin, silica cell walls; some w/neurotoxin.

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Phaeophyta:

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(aka Brown algae) with cellulose and aglinic acid, multicellular, chloryphyll a & c and xanthophylls, it sexually replicates and it stores carbohydrates. See chart p359

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Pyrrophyta:

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A.K.A. Dinoflagellates and Cryptomonads see chart 359,dinoflagellates that produce neurotoxins that cause paralytic shellfish poisoning and ciguatera.

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Rhodophyta

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red algae; grows deeper in the ocean than other algae because their red pigments can absorb the blue light that penetrates to deeper levels.

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Dinoflagellates

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unicell. protists, algae called plankton, free-floating organisms; rigid structure of cellulose in plasma membrane; make neurotoxins; PSP

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Algin

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a sodium salt of mannuronic acid (C6H8O6); found in brown algae

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Red tide

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a bloom of planktonic dinoflagellates; marine life suffers from neurotoxin dinoflagellates produce- affects muscle function in susceptible organisms.

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Paralytic shellfish poisoning

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(PSP) disease caused by specific neurotoxins (saxitoxins); when large numbers of dinoflagellates are eaten by mollusks, then humans eat and get PSP

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Coraline Algae

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Red algae that help in the ecology of coral reefs

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EXAM 4 CHAPTER 12
ALGAE
MICROBIOLOGY

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