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METSCHNIKOWIA KAMIENSKII, SP. N., A YEAST ASSOCIATED WITH BRINE SHRIMP
Abstract:
Spencer, J. F. T. (University of California, Davis), H. J. Phaff, and N. R. Gardner. Metschnikowia kamienskii sp. n., a yeast associated with brine shrimp. J. Bacteriol. 88:758-762. 1964.-A description is given of Metschnikowia kamienskii sp. n., four strains of which were isolated from brine shrimp (Artemia salina) collected from a saline lake near Watrous, Saskatchewan, Canada. In addition, we obtained from N. van Uden a fifth strain which was originally isolated by L. J. Wickerham from sporocysts of the trematode Diplostomum flexicaudum parasitizing the hepatopancreas of a lymnaeid snail found in Lake Douglas, Michigan, in which material the yeast was first observed by Kathleen Hussey of Columbia University. All strains were identical and formed long club-shaped asci, containing a single needle-shaped spore, pointed at both ends. M. kamienskii differs in several of its physiological properties and by the size of its asci from the two previously isolated members of the genus, M. krissii and M. zobellii. A key differentiating the three species is given.
Insights
A new yeast species, Metschnikowia kamienskii, was identified from brine shrimp (Artemia salina). This yeast, distinct from other Metschnikowia species, possesses unique physiological traits and ascus morphology.
Area of Science:
- Microbiology
- Yeast Taxonomy
- Mycology
Background:
- The genus Metschnikowia comprises yeasts with specific morphological and physiological characteristics.
- Previous research had identified two species within the Metschnikowia genus: M. krissii and M. zobellii.
- Yeasts are crucial in various ecological niches and biotechnological applications.
Purpose of the Study:
- To describe a newly discovered yeast species, Metschnikowia kamienskii.
- To characterize the morphological and physiological properties of the new species.
- To differentiate M. kamienskii from existing Metschnikowia species.
Main Methods:
- Isolation of yeast strains from brine shrimp (Artemia salina) and trematode sporocysts.
- Microscopic examination for morphological characterization, including ascus and spore shape.
- Physiological tests to determine metabolic capabilities and biochemical properties.
Main Results:
- Four strains of Metschnikowia kamienskii were isolated from brine shrimp in Saskatchewan, Canada.
- A fifth strain, originally isolated from a trematode parasite, was also identified as M. kamienskii.
- All strains exhibited identical characteristics, including long club-shaped asci with a single needle-shaped spore.
- M. kamienskii was differentiated from M. krissii and M. zobellii based on physiological properties and ascus size.
Conclusions:
- Metschnikowia kamienskii represents a distinct new species within the Metschnikowia genus.
- The yeast is associated with brine shrimp (Artemia salina) and trematode parasites.
- A key for differentiating the three known Metschnikowia species is provided.
