Abstract
Two strains of molds in different genus producing red pigments by interaction of each other were isolated from molds grown on paper label for export canned food and the phenomenon of red pigment formation was investigated.
The results were as follows:
(1) Both isolated strains were ascertained never to produce red pigments independently, but always produced them by interaction of each other. The pigments were also never produced by heterocaryone in anastomosis of two strains.
(2) The maximum pigment formation was obtained at 48 hours in shaking submerged culture.
(3) Mechanism of red pigments formation was supposed to be enzymatic reaction.
(4) It was suggested that the pigments in the mycelium and culture filtrate were mixtures of several pigments and they may not be anthraquinones.
