Consulta: creatorFacets:"Mei, Nan"
Registros recuperados: 3
Data/hora: 01/06/2024 16:48:42

Microbial diversity in a submarine carbonate edifice from the serpentinizing hydrothermal system of the Prony Bay (New Caledonia) over a 6-year period
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Postec, Anne; Quemeneur, Marianne; Bes, Meline; Mei, Nan; Benaissa, Fatma; Payri, Claude; Pelletier, Bernard; Monnin, Christophe; Guentas-dombrowsky, Linda; Ollivier, Bernard; Gerard, Emmanuelle; Pisapia, Celine; Gerard, Martine; Menez, Benedicte; Erauso, Gael.
Active carbonate chimneys from the shallow marine serpentinizing Prony Hydrothermal Field were sampled 3 times over a 6 years period at site ST09. Archaeal and bacterial communities composition was investigated using PCR-based methods (clone libraries, Denaturating Gel Gradient Electrophoresis, quantitative PCR) targeting 16S rRNA genes, methyl coenzyme M reductase A and dissimilatory sulfite reductase subunit B genes. Methanosarcinales (Euryarchaeota) and Thaumarchaea were the main archaeal members. The Methanosarcinales, also observed by epifluorescent microscopy and FISH, consisted of two phylotypes that were previously solely detected in two other serpentinitzing ecosystems (The Cedars and Lost City Hydrothermal Field). Surprisingly, members of the...
Tipo: Text
Palavras-chave: Hydrothermal; Serpentinization; Alkaline; Prony; Microbial communities.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00467/57916/60307.pdf

Serpentinicella alkaliphila gen. nov., sp nov., a novel alkaliphilic anaerobic bacterium isolated from the serpentinite-hosted Prony hydrothermal field, New Caledonia
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mei, Nan; Postec, Anne; Erauso, Gael; Joseph, Manon; Pelletier, Bernard; Payri, Claude; Ollivier, Bernard; Quemeneur, Marianne.
A novel anaerobic, alkaliphilic, Gram-stain-positive, spore-forming bacterium was isolated from a carbonaceous hydrothermal chimney in Prony Bay, New Caledonia. This bacterium, designated strain 3b(T), grew at temperatures from 30 to 43 degrees C (optimum 37 degrees C) and at pH between 7.8 and 10.1 (optimum 9.5). Added NaCl was not required for growth (optimum 0-0.2 %, w/v), but was tolerated at up to 4 %. Yeast extract was required for growth. Strain 3b(T) utilized crotonate, lactate and pyruvate, but not sugars. Crotonate was dismutated to acetate and butyrate. Lactate was disproportionated to acetate and propionate. Pyruvate was degraded to acetate plus trace amounts of hydrogen. Growth on lactate was improved by the addition of fumarate, which was...
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00467/57912/60312.pdf

Metagenomic and PCR-Based Diversity Surveys of [FeFe]-Hydrogenases Combined with Isolation of Alkaliphilic Hydrogen-Producing Bacteria from the Serpentinite-Hosted Prony Hydrothermal Field, New Caledonia
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mei, Nan; Postec, Anne; Monnin, Christophe; Pelletier, Bernard; Payri, Claude E.; Menez, Benedicte; Frouin, Eleonore; Ollivier, Bernard; Erauso, Gael; Quemeneur, Marianne.
High amounts of hydrogen are emitted in the serpentinite-hosted hydrothermal field of the Prony Bay (PHF, New Caledonia), where high-pH (similar to 11), low-temperature (&lt; 40 degrees C), and low-salinity fluids are discharged in both intertidal and shallow submarine environments. In this study, we investigated the diversity and distribution of potentially hydrogen-producing bacteria in Prony hyperalkaline springs by using metagenomic analyses and different PCR-amplified DNA sequencing methods. The retrieved sequences of hydA genes, encoding the catalytic subunit of [FeFe]-hydrogenases and, used as a molecular marker of hydrogen-producing bacteria, were mainly related to those of Firmicutes and clustered into two distinct groups depending on sampling...
Tipo: Text
Palavras-chave: Hydrogen; Microbial diversity; Hydrogen producers; Serpentinization; HydA genes; [FeFe]-hydrogenase; Metagenomics.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00467/57913/60308.pdf