Responses of methanotrophic activity in soils and cultures to water stress.

Applied and Environmental Microbiology
S Schnell, G M King

Abstract

Diffusive gas transport at high water contents and physiological water stress at low water contents limited atmospheric methane consumption rates during experimental manipulations of soil water content and water potential. Maximum rates of atmospheric methane consumption occurred at a soil water content of 25% (grams per gram [dry weight]) and a water potential of about -0.2 MPa. In contrast, uptake rates were highest at a water content of 38% and a water potential of -0.03 MPa when methane was initially present at 200 ppm. Uptake rates of atmospheric and elevated methane decreased when water potentials were reduced by adding either ionic or nonionic solutes to soils with a fixed water content. Uptake rates during these manipulations were lower when sodium chloride or potassium chloride was used to adjust water potential rather than sucrose. The response of methane consumption by soils to water potential was somewhat less pronounced than the response of methanotrophic cultures (e.g., Methylosinus trichosporium OB3b, Methylomonas rubra [= M. methanica], an isolate from a freshwater peat, and an isolate from an intertidal marine mudflat). However, unlike soils, methanotrophic cultures exhibited a stronger adverse response to noni...Continue Reading

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Citations

Jul 2, 1998·Applied and Environmental Microbiology·J A AmaralR Knowles
May 5, 2005·Applied and Environmental Microbiology·Hans-Peter HorzBrendan J M Bohannan
Jun 19, 2010·Applied Microbiology and Biotechnology·David van der HaNico Boon
May 20, 2014·Applied and Environmental Microbiology·Giovanni GanendraNico Boon
Aug 31, 2000·Applied and Environmental Microbiology·K Nanba, G M King
Dec 9, 2003·Applied and Environmental Microbiology·Robert I GriffithsMark J Bailey
Mar 15, 2008·Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA·Marion Huber-HumerHelene Hilger
Oct 31, 1998·Applied and Environmental Microbiology·J Gulledge, J P Schimel
Mar 20, 2010·FEMS Microbiology Reviews·Jeremy D SemrauSukhwan Yoon
Jul 31, 2009·The ISME Journal·Carolyn F Weber, Gary M King
May 15, 2015·Applied Microbiology and Biotechnology·Giovanni GanendraNico Boon
Jan 23, 2016·FEMS Microbiology Ecology·Katrin HofmannPaul Illmer
Jun 11, 2019·Journal of Environmental Quality·Kenneth S EvansDaniel Ginting
Sep 3, 1999·Applied and Environmental Microbiology·P Roslev, N Iversen
Dec 3, 1999·Applied and Environmental Microbiology·G M King
Mar 1, 1997·Applied and Environmental Microbiology·P RoslevK Henriksen
Sep 28, 2021·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·M J GondweU M Skiba

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