Neobodonids are dominant kinetoplastids in the global ocean

0498165 - BC 2019 RIV GB eng J - Journal Article
Flegontova, Olga - Flegontov, Pavel - Malviya, S. - Poulain, J. - de Vargas, C. - Bowler, C. - Lukeš, Julius - Horák, Aleš
Neobodonids are dominant kinetoplastids in the global ocean.
Environmental Microbiology. Roč. 20, č. 2 (2018), s. 878-889. ISSN 1462-2912. E-ISSN 1462-2920
R&D Projects: GA MŠMT LL1601; GA ČR GA15-17643S; GA ČR(CZ) GA14-23986S
Institutional support: RVO:60077344
Keywords : soft tunic syndrome * ribosomal-rna * microbial eukaryotes * azumiobodo-hoyamushi * community structure * causative agent * fresh-water * diversity * phylogeny * evolution
OECD category: Microbiology
Impact factor: 5.147, year: 2018

Kinetoplastid flagellates comprise basal mostly free-living bodonids and derived obligatory parasitic trypanosomatids, which belong to the best-studied protists. Due to their omnipresence in aquatic environments and soil, the bodonids are of ecological significance. Here, we present the first global survey of marine kinetoplastids and compare it with the strikingly different patterns of abundance and diversity in their sister clade, the diplonemids. Based on analysis of 18S rDNA V9 ribotypes obtained from 124 sites sampled during the Tara Oceans expedition, our results show generally low to moderate abundance and diversity of planktonic kinetoplastids. Although we have identified all major kinetoplastid lineages, 98% of kinetoplastid reads are represented by neobodonids, namely specimens of the Neobodo and Rhynchomonas genera, which make up 59% and 18% of all reads, respectively. Most kinetoplastids have small cell size (0.8-5 mu m) and tend to be more abundant in the mesopelagic as compared to the euphotic zone. Some of the most abundant operational taxonomic units have distinct geographical distributions, and three novel putatively parasitic neobodonids were identified, along with their potential hosts.
Permanent Link: http://hdl.handle.net/11104/0290568