ArticleThe ISME journal2015
The ecology of pelagic freshwater methylotrophs assessed by a high-resolution monitoring and isolation campaign.
Article in The ISME journal, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 62 papers.
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Who cites it
62 citing papers in PubMed, 130 citations in OpenAlex.
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- The effect of urbanization on planktonic and biofilm bacterial communities in different water bodies of the Danube River in Hungary.Scientific reports · 2024Article
- Flexible genomic island conservation across freshwater and marine Methylophilaceae.The ISME journal · 2024Article
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- New chemical and microbial perspectives on vitamin B1 and vitamer dynamics of a coastal system.ISME communications · 2024Article
- Oxic methane production from methylphosphonate in a large oligotrophic lake: limitation by substrate and organic carbon supply.Applied and environmental microbiology · 2023Article
- In the right place, at the right time: the integration of bacteria into the Plankton Ecology Group model.Microbiome · 2023Article
2 more citing papers are in PubMed but not listed here.
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Authors and funding
4 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Methylotrophic planktonic bacteria fulfill a particular role in the carbon cycle of lakes via the turnover of single-carbon compounds. We studied two planktonic freshwater lineages (LD28 and PRD01a001B) affiliated with Methylophilaceae (Betaproteobacteria) in Lake Zurich, Switzerland, by a combination of molecular and cultivation-based approaches. Their spatio-temporal distribution was monitored at high resolution (n=992 samples) for 4 consecutive years. LD28 methylotrophs constituted up to 11 × 10(7) cells l(-1) with pronounced peaks in spring and autumn-winter, concomitant with blooms of primary producers. They were rare in the warm water layers during summer but abundant in the cold hypolimnion, hinting at psychrophilic growth. Members of the PRD01a001B lineage were generally less abundant but also had maxima in spring. More than 120 axenic strains from these so far uncultivated lineages were isolated from the pelagic zone by dilution to extinction. Phylogenetic analysis separated isolates into two distinct genotypes. Isolates grew slowly (μmax=0.4 d(-1)), were of conspicuously small size, and were indeed psychrophilic, with higher growth yield at low temperatures. Growth was enhanced upon addition of methanol and methylamine to sterile lake water. Genomic analyses of two strains confirmed a methylotrophic lifestyle with a reduced set of genes involved in C1 metabolism. The very small and streamlined genomes (1.36 and 1.75 Mb) shared several pathways with the marine OM43 lineage. As the closest described taxa (Methylotenera sp.) are only distantly related to either set of isolates, we propose a new genus with two species, that is, 'Candidatus Methylopumilus planktonicus' (LD28) and 'Candidatus Methylopumilus turicensis' (PRD01a001B).
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