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

The Journal of General and Applied Microbiology

Tadao Kunihiro¹  Naohiro Goto¹  Hong-Ying Hu²  Koichi Fujie¹  Byung-Ran Lim¹ 

[1] Department of Ecological Engineering, Toyohashi University of Technology;ESPC, Department of Environmental Science and Engineering, Tsinghua University

关键词: microbial community structure;    microbial diversity;    quinone profile;    river;    sessile microorganism;    suspended microorganism;   

DOI  :  10.2323/jgam.48.35

学科分类：微生物学和免疫学

来源: Applied Microbiology, Molecular and Cellulrar Biosciences Research Foundation

【 摘 要 】

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-10, 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.

【 授权许可】

Unknown