Clarifying the relationships between microsporidia and cryptomycota

Bass David, Czech Lucas, Williams Bryony A. P., Berney Cédric, Dunthorn Micah, Mahe Frédéric, Torruella Guifré, Stentiford Grant D., Williams Tom A.. 2018. Clarifying the relationships between microsporidia and cryptomycota. Journal of Eukaryotic Microbiology, 65 (6) : 773-782.

Quartile : Q3, Sujet : MICROBIOLOGY

Résumé : Some protists with microsporidian‐like cell biological characters, including Mitosporidium, Paramicrosporidium, and Nucleophaga, have SSU rRNA gene sequences that are much less divergent than canonical Microsporidia. We analysed the phylogenetic placement and environmental diversity of microsporidian‐like lineages that group near the base of the fungal radiation and show that they group in a clade with metchnikovellids and canonical microsporidians, to the exclusion of the clade including Rozella, in line with what is currently known of their morphology and cell biology. These results show that the phylogenetic scope of Microsporidia has been greatly underestimated. We propose that much of the lineage diversity previously thought to be cryptomycotan/rozellid is actually microsporidian, offering new insights into the evolution of the highly specialized parasitism of canonical Microsporidia. This insight has important implications for our understanding of opisthokont evolution and ecology, and is important for accurate interpretation of environmental diversity. Our analyses also demonstrate that many opisthosporidian (aphelid+rozellid+microsporidian) SSU V4 OTUs from Neotropical forest soils group with the short‐branching Microsporidia, consistent with the abundance of their protist and arthropod hosts in soils. This novel diversity of Microsporidia provides a unique opportunity to investigate the evolutionary origins of a highly specialized clade of major animal parasites.

Mots-clés libres : Mitosporidium, Nucleophaga, Paramicrosporidium, Rozella, Rozellida, Rozellomycota

Classification Agris : L73 - Maladies des animaux
P34 - Biologie du sol

Champ stratégique Cirad : Axe 4 (2014-2018) - Santé des animaux et des plantes

Auteurs et affiliations

• Bass David, Natural History Museum (GBR) - auteur correspondant
• Czech Lucas, Heidelberg Institute for Theoretical Studies (DEU)
• Williams Bryony A. P., University of Exeter (GBR)
• Berney Cédric, Université Paris-Sorbonne (FRA)
• Dunthorn Micah, University of Kaiserslautern (DEU)
• Mahe Frédéric, CIRAD-BIOS-UMR LSTM (FRA) ORCID: 0000-0002-2808-0984
• Torruella Guifré, CNRS (FRA)
• Stentiford Grant D., Fisheries and Aquaculture Science (GBR)
• Williams Tom A., University of Bristol (GBR)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/588447/)

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