抄録
Asterionella glacialis, a marine diatom, which occurred a bloom in October in Maizuru Bay, Japan, was isolated, and the effect of bacteria on the growth of this alga was examined. This alga did not grow axenically, but grew after addition of a Flavobacterium NAST (the monoxenic condition). The growth of A. glacialis was strongly stimulated by a bacterium (Pseudomonas 022) occurring during the algal bloom in Maizuru Bay. The algal growth was also stimulated by the filtrate of Pseudomonas 022-monoxenic A. glacialis culture. The results suggest that the alga is promoted by some metabolite of a concomitant bacterium.
