Kunihiro, T Hu, HY Lim, Byung Ran Goto, N Fujie, K 2024-01-21T11:06:53Z 2024-01-21T11:06:53Z 2022-04-05 2002-02 0022-1260 https://pubs.kist.re.kr/handle/201004/139780 In this study, a quinone profiling method was applied to clarify the differences in community structure between suspended and sessile microorganisms in rivers. The compositions of microbial quinone of 6 sites for 4 rivers were analyzed. Ubiquinone (UQ)-8, UQ-110, menaquinone (MK)7, and plastoquinone (PQ)-9 were observed in all samples of suspended and sessile microorganisms for the sites investigated. The dominant quinone species in suspended microorganisms was ubiquinone, and that in sessile microorganism was photosynthetic quinones (namely PQ-9 and vitamin K1). This indicated that aerobic bacteria were abundant in the suspended microorganisms, and photosynthetic microorganisms such as micro-algae and cyanobacteria dominated in the sessile microorganisms. The quinone concentration in the river waters tested, which reflects the concentration of suspended microorganisms, ranged from 0.045 to 1.813 nmol/L. The microbial diversities of suspended and sessile microorganisms calculated based on the composition of all quinones were in the range from 3.4 to 7.5, which was lower than those for activated sludge and soils. Moreover, the diversity of heterotrophic bacteria for sessile microorganisms in the rivers was higher than that for the suspended microorganisms. English Microbiology Research Foundation Analysis of the differences in microbial community structures between suspended and sessile microorganisms in rivers based on quinone profile Article 10.2323/jgam.48.35 1 Journal of General and Applied Microbiology, v.48, no.1, pp.35 - 41 Journal of General and Applied Microbiology 48 1 35 41 N scopus 000175493500005 Biotechnology & Applied Microbiology Microbiology Biotechnology & Applied Microbiology Microbiology Article RESPIRATORY QUINONES ACTIVATED-SLUDGE ENVIRONMENT POPULATIONS microbial community structure microbial diversity quinone profile river sessile microorganism suspended microorganism