담수식물 뿌리로부터 세균의 분리 = Isolation of Bacteria from Freshwater Plant Roots

다국어 초록 (Multilingual Abstract)

The isolation and identification of bacteria from freshwater plant root system were performed. Twenty four different strains were indentified by microbiological identification system. Gram negative bacteria were isolated three times more than Gram positive ones. The ratio of rod and coccus was 11:1. The similarity above 0.5 was 37.5% from the tested samples in identification. Among these isolated bacteria, three dominant strains Pseudomonas cepacia JH10, Xanthomonas maltophilia JH12, Aeromonas salmonicida JH13 were selected to investigate biochemical properties and optimal growth conditions. These strains reached maximum growth after 24-36 hr of incubation in peptone broth, and their optimal temperature was 28℃ and that of pH was between 7 and 8.