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Microalgae and Protists

Since 1983, culture strains of microalgae and protists have been maintained in the Microbial Culture Collection (NIES-Collection) for the purpose of research and monitoring on biodiversity and ecosystem conservation. At present (2011), about 2,600 culture strains are maintained.
Among these strains, 2000 are available for educational and research uses. The Collection also accepts the deposition of strains which are important for both basic and applied researches in environmental science.

(KAWACHI Masanobu, Biodiversity Resource Conservation Section)

Two thirds of algal strains held in the NIES-Collection are maintained by subculture under appropriate conditions. They are transferred to new media regularly.

Cryopreservation is applicable to certain groups of algae, therefore, about 1/3 of strains including cyanobacteria and coccoid green algae are frozen in liquid nitrogen.

Culture strains of stoneworts regenerated from oospores buried in bottom sediment of Lake Kasumigaura.