Abstract
In the previous studies, it was reported that Chlorella extract contained growth promoting substance for microorganisms.
Several experiments have been carried out with Tetrahymena pyriformis-W and Saccharomyces cerevisiae. It is concluded that, 1) growth-promotion is accomplished chiefly by increasing of cell number rather than enlargement of cell size, and 2) promoting effect of chlorella extract is superior to that of yeast extract.
Both extracts were fractionated by Sephadex G-25, and a fraction specific in Chlorella extract was found to be the most effective in growth of microorganisms.
