The Chytrid-like Parasites of Algae Amoeboradix gromovi gen. et sp. nov. and Sanchytrium tribonematis Belong to a New Fungal Lineage
| Autor: | Maria A. Mamkaeva, Victoria S. Tcvetkova, Andrey E. Vishnyakov, David Moreira, Sergey Karpov, Purificación López-García, Vladimir I. Klimov |
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| Přispěvatelé: | Ecologie Systématique et Evolution (ESE), Université Paris-Sud - Paris 11 (UP11)-AgroParisTech-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Tribonema amoeboid zoospore Lineage (evolution) [SDV.BID]Life Sciences [q-bio]/Biodiversity Biology [SDV.BID.SPT]Life Sciences [q-bio]/Biodiversity/Systematics Phylogenetics and taxonomy Microbiology Article 18S ribosomal RNA 03 medical and health sciences Chlorophyta RNA Ribosomal 28S Monoblepharidomycetes Botany RNA Ribosomal 18S life cycle DNA Fungal Phylogeny molecular phylogeny Phylogenetic tree [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] Fungi biology.organism_classification ultrastructure Incertae sedis kinetosome 030104 developmental biology Taxon Evolutionary biology Molecular phylogenetics Parasites of algae |
| Zdroj: | Protist Protist, Elsevier, 2018, 169 (1), pp.122-140. ⟨10.1016/j.protis.2017.11.002⟩ |
| ISSN: | 1434-4610 |
| DOI: | 10.1016/j.protis.2017.11.002 |
| Popis: | International audience; Fungi encompass, in addition to classically well-studied lineages, an ever-expanding diversity of poorly known lineages including zoosporic chytrid-like parasites. Here, we formally describe Amoeboradix gromovi gen. et sp. nov. comprising a set of closely related strains of chytrid-like parasites of the yellow-green alga Tribonema gayanum unusually endowed with amoeboid zoospores. Morphological and ultrastructural features of A. gromovi observed by light and transmission electron microscopy recall previous descriptions of Rhizophydium anatropum. A. gromovi exhibits one of the longest kinetosomes known in eukaryotes, composed of microtubular singlets or doublets. To carry out molecular phylogenetic analysis and validate the identification of different life cycle stages, we amplified 18S rRNA genes from three A. gromovi strains infecting T. gayanum cultures, single sporangia and single zoospores. Molecular phylogenetic analyses of 18S+28S rRNA concatenated genes of the type strain revealed that A. gromovi is closely related to the recently described species Sanchytrium tribonematis, another parasite of Tribonema that had been tentatively classified within Monoblepharidomycetes. However, our phylogenetic analysis with an extended taxon sampling did not show any particular affinity of Amoeboradix and Sanchytrium with described fungal taxa. Therefore, Amoeboradix gromovi and Sanchytrium tribonematis likely represent a new divergent taxon that remains incertae sedis within Fungi. |
| Databáze: | OpenAIRE |
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