Denitrifying Bacteria in the Earthworm Gastrointestinal Tract and In Vivo Emission of Nitrous Oxide (N(inf2)O) by Earthworms.

Applied and Environmental Microbiology
G R Karsten, Harold L Drake

Abstract

Earthworms (Lumbricus rubellus and Octolasium lacteum) and gut homogenates did not produce CH(inf4), and methanogens were not readily culturable from gut material. In contrast, the numbers of culturable denitrifiers averaged 7 x 10(sup7) and 9 x 10(sup6) per g (dry weight) of gut material for L. rubellus and O. lacteum, respectively; these values were 256- and 35-fold larger than the numbers of culturable denitrifiers in the soil from which the earthworms were obtained. Anaerobically incubated earthworm gut homogenates supplemented with nitrate produced N(inf2)O at rates exceeding that of soil homogenates. Furthermore, living earthworms emitted N(inf2)O under aerobic conditions, and N(inf2)O emission was stimulated by acetylene. For earthworms collected from a mildly acidic (pH 6) beech forest soil, the rates of N(inf2)O emission for earthworms and soil averaged 884 and 2 pmol per h per g (fresh weight), respectively. In contrast, for earthworms collected from a more acidic (pH 4.6) oak-beech forest soil, N(inf2)O emission by earthworms and soil averaged 145 and 45 pmol per h per g (fresh weight), respectively. Based on the extrapolation of this data, earthworms accounted for an estimated 16 and 0.25% of the total N(inf2)O prod...Continue Reading

References

Sep 1, 1991·Applied and Environmental Microbiology·M D Kane, J A Breznak
Jun 7, 1994·Proceedings of the National Academy of Sciences of the United States of America·J H Hackstein, C K Stumm
Nov 1, 1953·Journal of Bacteriology·S R KHAMBATA, J V BHAT
Jan 1, 1957·Archiv für Mikrobiologie·S R KHAMBATA, J V BHAT
Mar 1, 1995·Applied and Environmental Microbiology·G R Karsten, H L Drake
Feb 1, 1996·Applied and Environmental Microbiology·C WagnerH L Drake

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Citations

Mar 7, 2003·Applied and Environmental Microbiology·Marcus A HornHarold L Drake
May 25, 2006·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Peter Stief, Gundula Eller
Dec 22, 2009·Applied and Environmental Microbiology·Katharina PalmerMarcus A Horn
Jul 9, 2010·The ISME Journal·Pia K WüstHarold L Drake
Jul 4, 2012·Journal of Environmental Quality·Cara A AugustenborgChristoph Müller
May 1, 2016·Applied and Environmental Microbiology·Ines M HeisterkampPeter Stief
May 18, 2007·Annual Review of Microbiology·Harold L Drake, Marcus A Horn
Feb 8, 2006·Applied and Environmental Microbiology·Marcus A HornHarold L Drake
Nov 20, 2016·FEMS Microbiology Reviews·Petr Baldrian
Feb 22, 2012·Applied and Environmental Microbiology·Peter S Depkat-JakobHarold L Drake
Aug 16, 2003·Environmental Microbiology·Andreas SchrammNicole Dubilier
Apr 4, 2019·FEMS Microbiology Ecology·Harriet DaleMichael Cunliffe
Nov 18, 2018·FEMS Microbiology Ecology·Lydia ZeibichHarold L Drake
Dec 17, 2017·Applied and Environmental Microbiology·Anja B MeierHarold L Drake
Jul 19, 2019·Frontiers in Microbiology·Daniel C SchlatterTimothy C Paulitz
Feb 7, 2019·Environmental Microbiology·Lydia ZeibichHarold L Drake
Apr 1, 2018·Applied and Environmental Microbiology·Lydia ZeibichHarold L Drake

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