Analysis of the differences in microbial community structures between suspended and sessile microorganisms in rivers based on quinone profile

Authors
Kunihiro, THu, HYLim, Byung RanGoto, NFujie, K
Issue Date
2002-02
Publisher
Microbiology Research Foundation
Citation
Journal of General and Applied Microbiology, v.48, no.1, pp.35 - 41
Abstract
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.
Keywords
RESPIRATORY QUINONES; ACTIVATED-SLUDGE; ENVIRONMENT; POPULATIONS; microbial community structure; microbial diversity; quinone profile; river; sessile microorganism; suspended microorganism
ISSN
0022-1260
URI
https://pubs.kist.re.kr/handle/201004/139780
DOI
10.2323/jgam.48.35
Appears in Collections:
KIST Article > 2002
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