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Inhhibitory effects of saturated fatty acids on methane production by methanogenic Archaea


Zeitz, J O; Bucher, S; Zhou, X; Meile, L; Kreuzer, M; Soliva, C R (2013). Inhhibitory effects of saturated fatty acids on methane production by methanogenic Archaea. Journal of Animal and Feed Sciences, 22(1):44-49.

Abstract

The present study investigated the inhibitory effects of saturated fatty acids on methanogenesis in Archaea, and whether or not competitive inactivation of the methanogens’ coenzyme M (HS-CoM) is involved in the inhibition. Strains tested in batch cultures were Methanosarcina barkeri, Methanosarcina mazei, Methanococcus voltae, all incubated at 37°C, and Methanothermobacter thermoautotrophicus, incubated at 65°C. The fatty acids C10, C12, C14 and C18 were supplemented at 1 mg . ml–1 in cultivation medium. The methanogens were susceptible to C10 and C12, and less so to C14. Only M. thermoautotrophicus was affected by C18. In M. mazei cultures, excessive HS-CoM did not prevent the action of C14 which might suggest that competitive inhibition of HS-CoM is not the reason for the SFA-induced effect on methanogenesis. The results indicate that, as a prerequisite to inhibit methanogenesis in Archaea, medium- and long-chain saturated fatty acids have to be at least partially molten.

Abstract

The present study investigated the inhibitory effects of saturated fatty acids on methanogenesis in Archaea, and whether or not competitive inactivation of the methanogens’ coenzyme M (HS-CoM) is involved in the inhibition. Strains tested in batch cultures were Methanosarcina barkeri, Methanosarcina mazei, Methanococcus voltae, all incubated at 37°C, and Methanothermobacter thermoautotrophicus, incubated at 65°C. The fatty acids C10, C12, C14 and C18 were supplemented at 1 mg . ml–1 in cultivation medium. The methanogens were susceptible to C10 and C12, and less so to C14. Only M. thermoautotrophicus was affected by C18. In M. mazei cultures, excessive HS-CoM did not prevent the action of C14 which might suggest that competitive inhibition of HS-CoM is not the reason for the SFA-induced effect on methanogenesis. The results indicate that, as a prerequisite to inhibit methanogenesis in Archaea, medium- and long-chain saturated fatty acids have to be at least partially molten.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:05 Vetsuisse Faculty > Institute of Animal Nutrition
Dewey Decimal Classification:570 Life sciences; biology
630 Agriculture
Uncontrolled Keywords:methanogen, methane, saturated fatty acid, lipid, inhibition
Language:English
Date:21 March 2013
Deposited On:11 Jul 2013 07:07
Last Modified:07 Dec 2017 21:25
Publisher:Polska Akademia Nauk * Instytut Fizjologii i Zywienia Zwierzat im. Jana Kielanowskiego
ISSN:1230-1388
Official URL:http://www.ifzz.pl/en/publications/journal-of-animal-and-feed-sciences/contents-from-2006-yr/vol-22-2013r/no-1?sobi2Task=sobi2Details&catid=87&sobi2Id=471

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