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Protists - Living Material
Live specimens are used for a wide variety of studies including studying the physiological effects of drugs on a specimen’s heartbeat and temperature on metabolism, the locomotion of microscopic organisms, and studying plant respiration, photosynthesis, plosmolysis, and more. Algal cultures form colonies of cells that are extremely easy to visualize for better understanding of cell walls and plastids, and many live specimens reproduce rapidly for quick turnover between successive tests.
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Colpidium
Hay medium. Characterized by cilia; nearly all possess two types of nuclei.
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Chilomonas
Two flagella; no chloroplasts. Food organism. Hay medium.
Characterized by flagella; lacks plastids.
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Difflugia
Test cylindrical, covered with sand granules. Soil-water medium.
Characterized by pseudopods; with or without a shell (test).
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Didinium
Predatory. Feeds on Paramecium caudatum. Hay medium.
Characterized by cilia; nearly all possess two types of nuclei.
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Ward's® Live Arcella Culture
Usually found in freshwater and mosses, this organism has a hard umbrella shaped shell or "test", out of which finger-like pseudopodia project.
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Dictyostelium discoideum, Demonstration Plate
Cellular slime mold. Demonstrates amoeboid state, pseudoplasmodial state, and fruiting body, or sorocarp. Found in woodland soil in decomposing vegetation where bacteria are abundant. Incubation temperature 25°C. Plate cultures grown with Enterobacteria as food source; freeze-dried cultures include food source.
Characterized by an amoeboid stage (lacking cell walls) and a fungus-like reproductive structure.
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Ward's® Live Actinosphaerium Sp. Culture
With stiff 'arms' radiating in all directions, these microscopic organisms look like sea urchins
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Ward's® Live Bursaria truncatella Culture
Very large ciliate. Feeds on colpidium. Hay medium.
Characterized by cilia; nearly all possess two types of nuclei.
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Ward's® Live Blepharisma Culture
Pink to bright rose color.
Characterized by cilia; nearly all possess two types of nuclei.
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Ward's® Live Chaos (Pelomyxa sp.) Culture
Members of the Pelomyxa genus look very much like Amoeba. Pelomyxa, however, have many nuclei, whereas Amoeba have only one.