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Title: Community composition and methane oxidation activity of methanotrophs associated with duckweeds in a fresh water lake
Authors: Iguchi, Hiroyuki
Umeda, Ryohei
Taga, Hiroki
Oyama, Tokitaka  kyouindb  KAKEN_id
Yurimoto, Hiroya  kyouindb  KAKEN_id  orcid (unconfirmed)
Sakai, Yasuyoshi  kyouindb  KAKEN_id
Author's alias: 井口, 博之
多賀, 洋輝
小山, 時隆
由里本, 博也
阪井, 康能
Keywords: Methanotroph
Methane oxidation
Issue Date: Oct-2019
Publisher: Elsevier B.V.
Journal title: Journal of Bioscience and Bioengineering
Volume: 128
Issue: 4
Start page: 450
End page: 455
Abstract: Methanotrophs are the only biological sink of the greenhouse gas methane. To understand the ecological features of methanotrophs in association with plants in the methane emitting environments, we investigated the community composition and methane oxidation of methanotrophs associated with duckweeds in a fresh water lake. Duckweeds collected from Lake Biwa, Japan over three summers showed methane consumption activity between 0.0067 and 0.89 μmol h⁻¹ g⁻¹ (wet weight), with the highest values occurring from the end of July to August. The methanotrophic community on duckweeds consisted primarily of γ-proteobacterial groups including the genera Methylomonas and Methylocaldum. Further analysis of co-cultures of a methanotroph isolate with sterilized duckweed revealed that the duckweed plant as well as the duckweed spent culture supernatant exerted an enhancing effect on methane oxidation. These results indicate that duckweeds not only provide a habitat for methanotrophs but also stimulate methanotrophic growth.
Rights: © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
The full-text file will be made open to the public on 1 October 2020 in accordance with publisher's 'Terms and Conditions for Self-Archiving'.
This is not the published version. Please cite only the published version.
DOI(Published Version): 10.1016/j.jbiosc.2019.04.009
PubMed ID: 31104899
Appears in Collections:Journal Articles

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