The Chytrid-like Parasites of Algae Amoeboradix gromovi gen. et sp. nov. and Sanchytrium tribonematis Belong to a New Fungal Lineage

Protist
Sergey A KarpovDavid Moreira

Abstract

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 ...Continue Reading

Citations

Nov 22, 2018·The Journal of Eukaryotic Microbiology·Sergey A KarpovPurificación López-García
Apr 18, 2020·Biological Reviews of the Cambridge Philosophical Society·Miguel A Naranjo-Ortiz, Toni Gabaldón
Apr 30, 2019·The Journal of Eukaryotic Microbiology·Sergey A KarpovPurificación López-García
Oct 30, 2019·Biological Reviews of the Cambridge Philosophical Society·Miguel A Naranjo-Ortiz, Toni Gabaldón
Aug 19, 2021·Nature Communications·Luis Javier GalindoDavid Moreira

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