The phylogenetic position of enteromonads: a challenge for the present models of diplomonad evolution
Jazyk angličtina Země Anglie, Velká Británie Médium print
Typ dokumentu časopisecké články, práce podpořená grantem
PubMed
16014510
DOI
10.1099/ijs.0.63542-0
Knihovny.cz E-zdroje
- MeSH
- Diplomonadida klasifikace genetika MeSH
- fylogeneze * MeSH
- molekulární evoluce * MeSH
- molekulární sekvence - údaje MeSH
- protozoální DNA analýza MeSH
- ribozomální DNA analýza MeSH
- RNA ribozomální genetika MeSH
- želvy parazitologie MeSH
- zvířata MeSH
- Check Tag
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Názvy látek
- protozoální DNA MeSH
- ribozomální DNA MeSH
- RNA ribozomální MeSH
Unikaryotic enteromonads and diplokaryotic diplomonads have been regarded as closely related protozoan groups. It has been proposed that diplomonads originated within enteromonads in a single event of karyomastigont duplication. This paper presents the first study to address these questions using molecular phylogenetics. The sequences of the small-subunit rRNA genes for three isolates of enteromonads were determined and a tree constructed with available diplomonad, retortamonad and Carpediemonas sequences. The diplomonad sequences formed two main groups, with the genus Giardia on one side and the genera Spironucleus, Hexamita and Trepomonas on the other. The three enteromonad sequences formed a clade robustly situated within the diplomonads, a position inconsistent with the original evolutionary proposal. The topology of the tree indicates either that the diplokaryotic cell of diplomonads arose several times independently, or that the monokaryotic cell of enteromonads originated by secondary reduction from the diplokaryotic state.
Citace poskytuje Crossref.org
GENBANK
AY701872, AY701873, AY701874
