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Titolo:
On core jakobids and excavate taxa: The ultrastructure of Jakoba incarcerata
Autore:
Simpson, AGB; Patterson, DJ;
Indirizzi:
Univ Sydney, Sch Biol Sci, Protist Res Lab, Sydney, NSW 2006, Australia Univ Sydney Sydney NSW Australia 2006 es Lab, Sydney, NSW 2006, Australia
Titolo Testata:
JOURNAL OF EUKARYOTIC MICROBIOLOGY
fascicolo: 4, volume: 48, anno: 2001,
pagine: 480 - 492
SICI:
1066-5234(200107/08)48:4<480:OCJAET>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
ANOXIC HABITATS; FLAGELLATE; EUKARYOTES; RETORTAMONADIDA; TRICHOMONADS; PHYLOGENY; PROTISTA; PROTEIN; GENOME; RECLINOMONAS;
Keywords:
cytoskeleton; diplomonads; eukaryotes; evolution; flagellates; Giardia; Jakobidae; protozoa; Reclinomonas; trichomonads;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
34
Recensione:
Indirizzi per estratti:
Indirizzo: Simpson, AGB Dalhousie Univ, Dept Biochem & Mol Biol, Sir Charles Tupper Med Bldg, Halifax, NS B3H 4H7, Canada Dalhousie Univ Sir Charles Tupper Med Bldg Halifax NS Canada B3H 4H7
Citazione:
A.G.B. Simpson e D.J. Patterson, "On core jakobids and excavate taxa: The ultrastructure of Jakoba incarcerata", J EUKAR MIC, 48(4), 2001, pp. 480-492

Abstract

The cellular organisation of the 'excavate' flagellate Jakoba incarcerata Bernard, Simpson and Patterson 2000 is described. Cells have one nucleus and dictyosome. The putative mitochondria lack cristae. Two flagella (anterior and posterior) insert anterior to the feeding groove. The posterior flagellum bears a dorsal vane. An 'anterior' microtubular root arises against the anterior basal body. Two main microtubular roots, left and right, and a singlet 'root' arise around the posterior basal body and support the groove. Non-microtubular fibres termed 'A','B', 'I', and 'composite' associate with the right root. A multilaminar 'C' fibre associates with the left root. The cytoskeleton of J. incarcerata indicates a common ancestry with other excavate taxa (i.e. diplomonads, retortamonads. heteroloboseids, 'core jakobids'. Malawimonas. Carpediemonas, and Trimastix). Overall, J. incarcerata ismost similar to (other) core jakobids, namely Jakoba libera, Reclinomona, and Histiona. We regard J. incarcerata as a core jakobid and identify the group by the synapomorphy 'varies restricted to dorsal side of the posteriorflagellum'. The anterior root and position of the B fibre (and presence ofdense inclusions in the cartwheels and a conscpicuous singlet root-associated fibre) in J. incarcerata are novel for core jakobids and argue for close relationships with Trimastix and/or Heterolobosea. The C fibre is similarin substructure to the costal fibre of parabasalids and it is possible that the structures are homologous.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/04/20 alle ore 01:44:35