DOI: 10.1016/j.watres.2018.08.014
Scopus记录号: 2-s2.0-85053070594
论文题名: Distribution, abundance and activity of geosmin and 2-methylisoborneol-producing Streptomyces in drinking water reservoirs
作者: Asquith E. ; Evans C. ; Dunstan R.H. ; Geary P. ; Cole B.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 145 起始页码: 30
结束页码: 38
语种: 英语
英文关键词: 2-methylisoborneol
; Geosmin
; Quantitative PCR
; Reservoir
; Streptomyces
; Taste and odour
Scopus关键词: Aquatic organisms
; Bacteria
; Cells
; Cytology
; Debris
; Ecosystems
; Polymerase chain reaction
; Population distribution
; Potable water
; Sediments
; Surface waters
; Underwater soils
; Water levels
; Water supply
; 2-methylisoborneol
; Geosmin
; Quantitative PCR
; Streptomyces
; Taste and odour
; Reservoirs (water)
; abundance
; cell
; cyanobacterium
; drinking water
; lysis
; microbial activity
; odor
; polymerase chain reaction
; population distribution
; quantitative analysis
; spore
; taste
; Cyanobacteria
; Streptomyces
英文摘要: While cyanobacteria have been widely recognised as the most common cause of geosmin and 2-methylisoborneol related taste and odour (T&O) episodes in drinking water supplies, many reported occurrences could not be attributed to these organisms. The Streptomyces genus of soil bacteria also includes producers of these compounds, however their potential role in such occurrences is poorly understood and often disregarded on the basis that they are terrestrial rather than aquatic organisms, with their detection in water samples assumed to reflect the presence of dormant spores rather than metabolically active vegetative cells. Using qPCR and a differential cell lysis technique for DNA extraction, allowing distinction of spores from vegetative cells, the aim of this study was to determine the distribution, abundance and potential activity of Streptomyces species across a range of aquatic and marginal habitat zones in two drinking water reservoirs, including: exposed soil, submerged sediments, plant debris and emergent macrophytes at the margins; marginal and offshore surface waters; deep offshore waters; and offshore benthic sediments. Marginal substrates including soil, sediment and plant debris were identified as the dominant habitat zones for Streptomyces, (concentrations up to 1.1 × 107 cells g−1) supporting the concept of ‘wash-in’ from the margins due to run-off or water level rise following rainfall, as the likely pathway for Streptomyces induced T&O in reservoirs. However, vegetative cells were also found to comprise a substantial proportion of Streptomyces populations in the reservoir water mass itself (>90% in some surface and bottom water samples), suggesting the potential for these bacteria to be metabolically active in the water and therefore contribute to in situ production of T&O metabolites. © 2018 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112426
Appears in Collections: 气候减缓与适应
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作者单位: School of Environmental and Life Sciences, University of Newcastle, University Drive CallaghanNSW 2308, Australia; Hunter Water Corporation, 36 Honeysuckle Drive, Newcastle WestNSW 2300, Australia
Recommended Citation:
Asquith E.,Evans C.,Dunstan R.H.,et al. Distribution, abundance and activity of geosmin and 2-methylisoborneol-producing Streptomyces in drinking water reservoirs[J]. Water Research,2018-01-01,145