The Metabolism of Streptomyces Griseus. III The Respiration of Streptomyces Griseus K-I Strain in Soybean and Casein Media

Abstract

In the preceding reportso^1,2) of this series, some aspects of the respiration of S. griseus KU strain cultured in the soybean medium was discussed. Recently, we⁽³⁾ obtained a new strain of the same species named K-I. This strain was found by us from the soil, and has been much improved in some characters from the point of production, especially in the capacity of streptomycin (SM) production, through repeated mutations by X-ray or ultraviolet ray irradiation and repeated selections by the monospore culture method. It is now in use for the practical streptomycin production in our plant. The origin of K-I strain is completely different from that of KU strain. In this paper, some results of the study on the respiration of this new strain will be reported.