The Ultrastructure of Sanchytrium tribonematis (Sanchytriaceae, Fungi incertae sedis) Confirms its Close Relationship to Amoeboradix.

Autor: Karpov SA; Zoological Institute, Russian Academy of Sciences, St. Petersburg, 199034, Russia.; St. Petersburg State University, St. Petersburg, 199034, Russia.; Unité d'Ecologie, Systématique et Evolution, CNRS, Université Paris-Sud, Université Paris-Saclay, AgroParisTech, 91400, Orsay, France., Vishnyakov AE; St. Petersburg State University, St. Petersburg, 199034, Russia., Moreira D; Unité d'Ecologie, Systématique et Evolution, CNRS, Université Paris-Sud, Université Paris-Saclay, AgroParisTech, 91400, Orsay, France., López-García P; Unité d'Ecologie, Systématique et Evolution, CNRS, Université Paris-Sud, Université Paris-Saclay, AgroParisTech, 91400, Orsay, France.
Jazyk: angličtina
Zdroj: The Journal of eukaryotic microbiology [J Eukaryot Microbiol] 2019 Nov; Vol. 66 (6), pp. 892-898. Date of Electronic Publication: 2019 May 31.
DOI: 10.1111/jeu.12740
Abstrakt: Fungi encompass, in addition to classically well-studied lineages, an ever-expanding diversity of poorly known lineages that include, among others, zoosporic chytrid-like parasites. According to recent phylogenetic analysis based on 18S + 28S rRNA concatenated genes two unusual chytrid-like fungi Amoeboradix gromovi and Sanchytrium tribonematis form a monophyletic group, the family Sanchytriaceae, which represents a new divergent taxon that remains incertae sedis within Fungi. Zoospores of Amoeboradix gromovi contain one of the longest kinetosomes known in eukaryotic cells, which are composed of microtubular singlets or doublets. However, the ultrastructure of S. tribonematis, the type species of the genus had not been yet studied. Here, we provide the results of TEM investigations of zoospores and sporangia from two strains of S. tribonematis. The two strains are endowed with unusual features. Like in A. gromovi, amoeboid zoospores of S. tribonematis contain a long kinetosome composed of microtubular singlets, and the two orthogonal centrioles in their sporangia have nine microtubular singlets with an internal ring. The morphological and ultrastructural features of S. tribonematis are now included in the improved taxonomic diagnosis for this species.
(© 2019 International Society of Protistologists.)
Databáze: MEDLINE
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