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dc.contributor.authorNewbold, C. Jamie
dc.contributor.authorde la Fuente Oliver, Gabriel
dc.contributor.authorBelanche, A.
dc.contributor.authorRamos-Morales, Eva
dc.contributor.authorMcEwan, Neil
dc.date.accessioned2015-11-26T19:27:45Z
dc.date.available2015-11-26T19:27:45Z
dc.date.issued2015-11-09
dc.identifier.issn1664-302X
dc.identifier.urihttp://hdl.handle.net/10459.1/49075
dc.description.abstractFirst described in 1843, Rumen protozoa with their striking appearance were assumed to be important for the welfare of their host. However, despite contributing up to 50% of the bio-mass in the rumen, the role of protozoa in rumen microbial ecosystem remains unclear. Phylogenetic analysis of 18S rDNA libraries generated from the rumen of cattle, sheep, and goats has revealed an unexpected diversity of ciliated protozoa although variation in gene copy number between species makes it difficult to obtain absolute quantification. Despite repeated attempts it has proven impossible to maintain rumen protozoa in axenic culture. Thus it has been difficult to establish conclusively a role of ciliate protozoa in rumen fibre degradation. The development of techniques to clone and express ciliate genes in  phage, together with bioinformatic indices to confirm the ciliate origin of the genes has allowed the isolation and characterisation of fibrolytic genes from rumen protozoa. Elimination of the ciliate protozoa increases microbial protein supply by up to 30% and reduces methane production by up to 11%. Our recent findings suggest that holotrich protozoa play a disproportionate role in supporting methanogenesis whilst the small entodiniium are responsible for much of the bacterial protein turnover. As yet no method to control protozoa in the rumen that is safe and practically applicable has been developed, however a range of plant extract capable of controlling if not completely eliminating rumen protozoa have been described.
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherFrontiers
dc.relation.isformatofReproducció del document publicat a: https://doi.org/10.3389/fmicb.2015.01313
dc.relation.ispartofFrontiers In Microbiology, 2015, Vol.6, a1313
dc.rightscc-by, (c) Newbold et al., 2015
dc.rights.urihttp://creativecommons.org/licenses/by/3.0
dc.subjectrumen protozoa
dc.subjectRumen
dc.subject.classificationRemugants
dc.subject.classificationProtozous
dc.subject.otherRuminants
dc.subject.otherProtozoa
dc.titleThe role of ciliate protozoa in the rumen
dc.typeinfo:eu-repo/semantics/article
dc.date.updated2015-11-26T19:27:45Z
dc.identifier.idgrec023445
dc.type.versioninfo:eu-repo/semantics/publishedVersion
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.identifier.doihttps://doi.org/10.3389/fmicb.2015.01313


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cc-by, (c) Newbold et al., 2015
Except where otherwise noted, this item's license is described as cc-by, (c) Newbold et al., 2015