New insight to the role of microbes in the methane exchange in trees : evidence from metagenomic sequencing

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Putkinen , A , Siljanen , H M P , Laihonen , A , Paasisalo , I , Porkka , K , Tiirola , M , Haikarainen , I , Tenhovirta , S & Pihlatie , M 2021 , ' New insight to the role of microbes in the methane exchange in trees : evidence from metagenomic sequencing ' , New Phytologist , vol. 231 , no. 2 , pp. 524-536 . https://doi.org/10.1111/nph.17365

Title: New insight to the role of microbes in the methane exchange in trees : evidence from metagenomic sequencing
Author: Putkinen, Anuliina; Siljanen, Henri M. P.; Laihonen, Antti; Paasisalo, Inga; Porkka, Kaija; Tiirola, Marja; Haikarainen, Iikka; Tenhovirta, Salla; Pihlatie, Mari
Contributor organization: Department of Agricultural Sciences
Environmental Soil Science
Institute for Atmospheric and Earth System Research (INAR)
Viikki Plant Science Centre (ViPS)
Methane and nitrous oxide exchange of forests
Ecosystem processes (INAR Forest Sciences)
Date: 2021-07
Language: eng
Number of pages: 13
Belongs to series: New Phytologist
ISSN: 0028-646X
DOI: https://doi.org/10.1111/nph.17365
URI: http://hdl.handle.net/10138/332172
Abstract: Methane (CH4) exchange in tree stems and canopies and the processes involved are among the least understood components of the global CH4 cycle. Recent studies have focused on quantifying tree stems as sources of CH4 and understanding abiotic CH4 emissions in plant canopies, with the role of microbial in situ CH4 formation receiving less attention. Moreover, despite initial reports revealing CH4 consumption, studies have not adequately evaluated the potential of microbial CH4 oxidation within trees. In this paper, we discuss the current level of understanding on these processes. Further, we demonstrate the potential of novel metagenomic tools in revealing the involvement of microbes in the CH4 exchange of plants, and particularly in boreal trees. We detected CH4-producing methanogens and novel monooxygenases, potentially involved in CH4 consumption, in coniferous plants. In addition, our field flux measurements from Norway spruce (Picea abies) canopies demonstrate both net CH4 emissions and uptake, giving further evidence that both production and consumption are relevant to the net CH4 exchange. Our findings, together with the emerging diversity of novel CH4-producing microbial groups, strongly suggest microbial analyses should be integrated in the studies aiming to reveal the processes and drivers behind plant CH4 exchange.
Subject: boreal forests
captured metagenomics
methane exchange
methanogenic archaea
methanotrophic bacteria
plant microbiome
tree
NITROUS-OXIDE
METHANOTROPHIC BACTERIA
ULTRAVIOLET-RADIATION
ENDOPHYTE COMMUNITIES
ATMOSPHERIC METHANE
PINUS-SYLVESTRIS
LIVING TREES
UV-RADIATION
SP NOV.
EMISSIONS
11831 Plant biology
Peer reviewed: Yes
Rights: cc_by
Usage restriction: openAccess
Self-archived version: publishedVersion


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