網糸の腐蝕に関する微生物学的研究(1)-海水中に存在する好気性繊維素分解細菌に就て(1)-

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1. A synthetic medium of the following ? was ? to be suited for the culture (enrichment and isolation) of marine aerobic cellulose-digesting bacteria. NaNO3 0.5g K2HPO4 1.0g MgSO4. 7H2O 0.5g FeSO4. 7H2O 0.01g Filterd sea-water 1000.0g Filter paper a strip (13cm×1cm) in each tube. 2. Seasonal variation of number of aerobic cellulose decomposing bacteria in sea-water (sa-mpled from Maizuru Bay) was observed. 3. Aerobic cellulose-decomposing bacteria which predominated in sea-water in different seas-ons were purely isolated and were classified into 3 species, viz., Vibrio purpureus, Vibrio pu-rpureus var, albus and Cellvibrio flavescens var. marinus, after detailed taxononical studies. In sea-water the Vibrio predcminated in summer and the Cellvibrio outnumbered the Vibrio in the other seasons.