GSTDTAP  > 地球科学
DOI10.5194/acp-17-14841-2017
H2O2 modulates the energetic metabolism of the cloud microbiome
Wirgot, Nolwenn1; Vinatier, Virginie1; Deguillaume, Laurent2; Sancelme, Martine1; Delort, Anne-Marie1
2017-12-14
发表期刊ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN1680-7316
EISSN1680-7324
出版年2017
卷号17期号:24
文章类型Article
语种英语
国家France
英文摘要

Chemical reactions in clouds lead to oxidation processes driven by radicals (mainly HO center dot, NO3 center dot, or HO2 center dot)or strong oxidants such as H2O2, O-3, nitrate, and nitrite. Among those species, hydrogen peroxide plays a central role in the cloud chemistry by driving its oxidant capacity. In cloud droplets, H2O2 is transformed by microorganisms which are metabolically active. Biological activity can therefore impact the cloud oxidant capacity. The present article aims at highlighting the interactions between H2O2 and microorganisms within the cloud system.


First, experiments were performed with selected strains studied as a reference isolated from clouds in microcosms designed to mimic the cloud chemical composition, including the presence of light and iron. Biotic and abiotic degradation rates of H2O2 were measured and results showed that biodegradation was the most efficient process together with the photo-Fenton process. H2O2 strongly impacted the microbial energetic state as shown by adenosine triphosphate (ATP) measurements in the presence and absence of H2O2. This ATP depletion was not due to the loss of cell viability. Secondly, correlation studies were performed based on real cloud measurements from 37 cloud samples collected at the PUY station (1465 m a.s.l., France). The results support a strong correlation between ATP and H2O2 concentrations and confirm that H2O2 modulates the energetic metabolism of the cloud microbiome. The modulation of microbial metabolism by H2O2 concentration could thus impact cloud chemistry, in particular the biotransformation rates of carbon compounds, and consequently can perturb the way the cloud system is modifying the global atmospheric chemistry.


领域地球科学
收录类别SCI-E
WOS记录号WOS:000417938800001
WOS关键词HYDROGEN-PEROXIDE ; ATMOSPHERIC CHEMISTRY ; OXIDATIVE STRESS ; DOME FRANCE ; POTENTIAL IMPACT ; ORGANIC-CARBON ; WATER ; PUY ; MICROORGANISMS ; PHASE
WOS类目Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/16203
专题地球科学
作者单位1.Univ Clermont Auvergne, CNRS, Sigma Clermont, Inst Chim Clermont Ferrand, F-63000 Clermont Ferrand, France;
2.Univ Clermont Auvergne, CNRS, Lab Meteorol Phys, F-63000 Clermont Ferrand, France
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GB/T 7714
Wirgot, Nolwenn,Vinatier, Virginie,Deguillaume, Laurent,et al. H2O2 modulates the energetic metabolism of the cloud microbiome[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(24).
APA Wirgot, Nolwenn,Vinatier, Virginie,Deguillaume, Laurent,Sancelme, Martine,&Delort, Anne-Marie.(2017).H2O2 modulates the energetic metabolism of the cloud microbiome.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(24).
MLA Wirgot, Nolwenn,et al."H2O2 modulates the energetic metabolism of the cloud microbiome".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.24(2017).
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