Isolation and some properties of methane-oxidizing bacteria from a subtropical paddy field

Abstract

Methane is the second most important greenhouse gas which contributes to global warming. As an important source of methane, rice paddy fields contribute an estimated lO% to the global methane emissions (IPCe 1992). Land use and agricultural practices significantly affect atmospheric methane fluxes (Bouwman 1989; Hütsch et al. 1994). Microbial oxidation of atmospheric methane in terrestrial environments is the only known net biological methane sink and the process consumes the equivalent of 1–l0% of the total global emission (Adamsen and King 1993). Methane-oxidizing bacteria (MOB, methanotrophic bacteria) are considered to be obligately or facultatively aerobic respiratory bacteria that can utilize methane as the sole source of carbon and energy for growth (Hanson et al. 1992; Roslev and King 1994). As a result, they are important regulators of atmospheric methane fluxes in nature (Mancinelli 1995). MOB have been isolated from a variety of environments including freshwater lakes, wetlands, and the open ocean (Whittenbury et al. 197Gb; Saralov et al. 1984; Holzapfel-Pschorn et al. 1985; Hanson et al. 1992; Omelchenko et al. 1993; Bowman et al. 1993a; Mancinelli 1995). However, reports on the isolation of MOB from rice paddy fields are limited. More information is needed on the ecology and taxonomy of MOB in paddy fields. © 1997 Taylor & Francis Group, LLC.

Source or Periodical Title

Soil Science and Plant Nutrition

ISSN

380768

Page

735-740

Document Type

Article

Subject

Acetylene reduction activity, Methane oxidation, Methane-oxidizing bacteria (methanotrophic bacteria)

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