STUDIES ON AEROBIC BACTERIA COMMONLY CONCERNED IN THE DECOMPOSITION OF CELLULOSE

Abstract

Cellulose-decomposing organisms are common in nature. Impure cultures may be grown on inorganic media because of growth of molds during long incubation, but an organic medium is necessary for isolation of pure strains. Casein-digest was found successful and a modification of the combined methods of isolation used by Kellerman, McBeth, and Groenewege was most satisfactory. All but 1 strain proved gela-tinolytic. All reduced nitrate to nitrite. Indol was not formed. The cellulose-fermenting power may be demonstrated gravimetrically. Addition of secondary potassium phosphate delayed development of acid reaction and increased cellulose decomposition. The presence of cellulose was demonstrated. The literature is reviewed.