Activity and Distribution of Methane-Oxidizing Bacteria in Flooded Rice Soil Microcosms and in Rice Plants (Oryza sativa).

Applied and Environmental Microbiology
U Bosse, P Frenzel

Abstract

The activity and distribution of CH(inf4)-oxidizing bacteria (MOB) in flooded rice (Oryza sativa) soil microcosms was investigated. CH(inf4) oxidation was shown to occur in undisturbed microcosms by using (sup14)CH(inf4), and model calculations indicated that almost 90% of the oxidation measured had taken place at a depth where only roots could provide the O(inf2) necessary. Slurry from soil planted with rice had an apparent K(infm) for CH(inf4) of 4 (mu)M and a V(infmax) of 0.1 (mu)mol g (dry weight)(sup-1) h(sup-1). At a depth of 1 to 2 cm, there was no significant difference (P > 0.05) in numbers of MOB between soil from planted and nonplanted microcosms (mean, 7.7 x 10(sup5) g [fresh weight](sup-1)). Thus, the densely rooted soil at 1 to 2 cm deep did not represent rhizospheric soil with respect to the number of MOB. A significantly increased number of MOB was found only in soil immediately around the roots (1.2 x 10(sup6) g [fresh weight](sup-1)), corresponding to a layer of 0.1 to 0.2 mm. Plant-associated CH(inf4) oxidation was shown in a double chamber with carefully washed intact rice plants. Up to 90% of the CH(inf4) supplied to the root compartment was oxidized in the plants. CH(inf4) oxidation on isolated roots was h...Continue Reading

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Citations

Jan 5, 2000·Applied and Environmental Microbiology·C H Yang, D E Crowley
May 26, 2001·Applied and Environmental Microbiology·G Eller, P Frenzel
Nov 10, 2007·Environmental Microbiology·Jun Murase, Peter Frenzel
Jun 25, 2010·The ISME Journal·Sascha KrausePeter Frenzel
Sep 30, 2016·Frontiers in Microbiology·Qianhui ZuYouzhi Feng
Dec 3, 1998·Applied and Environmental Microbiology·J J Rich, G M King
Jan 1, 2008·Applied and Environmental Microbiology·Ian R McDonaldJ Colin Murrell
Jan 16, 2002·Journal of Environmental Quality·S KumaraswamyN Sethunathan
Oct 1, 2009·Environmental Microbiology Reports·Qiongfen QiuYahai Lu
Mar 22, 2016·Scientific Reports·Katerina MachacovaMari Pihlatie
Oct 1, 2012·Global Change Biology·Kamaljit BangerChaoqun Lu
Jul 27, 2001·Applied and Environmental Microbiology·P van BodegomP Leffelaar
Dec 3, 1998·Applied and Environmental Microbiology· Gro kopf RW Liesack
Aug 9, 2005·Environmental Science & Technology·Roland W Melse, Arjan W Van der Werf

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