Some rumen ciliates have endosymbiotic methanogens.
FEMS Microbiol Lett
; 117(2): 157-61, 1994 Apr 01.
Article
em En
| MEDLINE
| ID: mdl-8181718
ABSTRACT
Most of the small ciliate protozoa, including Dasytricha ruminantium and Entodinium spp. living in the rumen of sheep, were found to have intracellular bacteria. These bacteria were not present in digestive vacuoles. They showed characteristic coenzyme F420 autofluorescence and they were detected with a rhodamine-labelled Archaea-specific oligonucleotide probe. The measured volume percent of autofluorescing bacteria (1%) was close to the total volume of intracellular bacteria estimated from TEM stereology. Thus it is likely that all of the bacteria living in the cytoplasm of these ciliates were endosymbiotic methanogens, using H2 evolved by the host ciliate to form methane. Intracellular methanogens appear to be much more numerous than those attached to the external cell surface of ciliates.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Rúmen
/
Simbiose
/
Cilióforos
/
Euryarchaeota
Limite:
Animals
Idioma:
En
Revista:
FEMS Microbiol Lett
Ano de publicação:
1994
Tipo de documento:
Article
País de afiliação:
Reino Unido