DOI: 10.1016/j.atmosenv.2015.02.060
Scopus记录号: 2-s2.0-84924405751
论文题名: Characterization of airborne ice-nucleation-active bacteria and bacterial fragments
作者: Šantl-Temkiv T ; , Sahyoun M ; , Finster K ; , Hartmann S ; , Augustin-Bauditz S ; , Stratmann F ; , Wex H ; , Clauss T ; , Nielsen N ; W ; , Sørensen J ; H ; , Korsholm U ; S ; , Wick L ; Y ; , Karlson U ; G
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 109 起始页码: 105
结束页码: 117
语种: 英语
英文关键词: Aeromicrobiology
; Airborne bacteria
; Bioprecipitation
; Ice nucleation
; INA bacteria
; Outer membrane vesicles
Scopus关键词: Ice
; Nucleation
; Precipitation (meteorology)
; Proteins
; Aeromicrobiology
; Airborne bacteria
; Bio-precipitation
; Ice nucleation
; Outer membrane vesicles
; Bacteria
; ice
; stainless steel
; aerosol
; bacteriology
; bacterium
; ice
; nucleation
; protein
; airborne bacterium
; airborne ice nucleation active bacteria
; Article
; atmosphere
; atmospheric dispersion
; atmospheric transport
; bacterial outer membrane
; cell density
; climate
; gene expression
; genetic variability
; microbial community
; nonhuman
; outer membrane
; precipitation
; priority journal
; room temperature
; transmission electron microscopy
; Bacteria (microorganisms)
; Pseudomonas
; Pseudomonas sp.
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Some bacteria have the unique capacity of synthesising ice-nucleation-active (INA) proteins and exposing them at their outer membrane surface. As INA bacteria enter the atmosphere, they may impact the formation of clouds and precipitation. We studied members of airborne bacterial communities for their capacity to catalyse ice formation and we report on the excretion of INA proteins by airborne Pseudomonas sp. We also observed for the first time that INA biological fragments <220nm were present in precipitation samples (199 and 482 INA fragments per L of precipitation), which confirms the presence of submicron INA biological fragments in the atmosphere. During 14 precipitation events, strains affiliated with the genus Pseudomonas, which are known to carry ina genes, were dominant. A screening for INA properties revealed that ~12% of the cultivable bacteria caused ice formation at ≤-7°C. They had likely been emitted to the atmosphere from terrestrial surfaces, e.g. by convective transport. We tested the ability of isolated INA strains to produce outer membrane vesicles and found that two isolates could do so. However, only very few INA vesicles were released per INA cell. Thus, the source of the submicron INA proteinaceous particles that we detected in the atmosphere remains to be elucidated. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81827
Appears in Collections: 气候变化事实与影响
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作者单位: Aarhus University, Department of Environmental Science, Roskilde, Denmark; Aarhus University, Department of Bioscience, Microbiology Section, Aarhus, Denmark; Aarhus University, Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus, Denmark; Danish Meteorological Institute, Department of Research and Development, Copenhagen, Denmark; Institute for Tropospheric Research, Leipzig, Germany; Helmholtz Centre for Environmental Research - UFZ, Department of Environmental Microbiology, Leipzig, Germany
Recommended Citation:
Šantl-Temkiv T,, Sahyoun M,, Finster K,et al. Characterization of airborne ice-nucleation-active bacteria and bacterial fragments[J]. Atmospheric Environment,2015-01-01,109