Monoblepharidomycetes diversity includes new parasitic and saprotrophic species with highly intronized rDNA

Karpov, Sergey A.; Mamanazarova, K.S.; Popova, Olga V.; Aleoshin, Vladimir V.; James, Timothy Y.; Mamkaeva, Maria A.; Tcvetkova, Victoria S.; Vishnyakov, Andrey E.; Longcore, Joyce E.

doi:10.1016/j.funbio.2017.05.002

Cited by 24 publications

(45 citation statements)

References 46 publications

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“…Light microscopic observations are consistent with the features observed in the few images published earlier for this species (Karpov et al. ). We studied sporangia in three S. tribonematis strains, which vary slightly in the shape and number of papillae: X‐126 has spherical sporangia with rare one or two papillae; X‐127 has spherical sporangia with no papillae; X‐128 has spherical to slightly elongated sporangia with one papilla.…”

Section: Discussionsupporting

confidence: 91%

“…The two strains seemed to belong to the same species (Karpov et al. ); accordingly, we did not find any morphological differences in zoospores, cysts, and sporangia by light and electron microscopy. Based on the newly generated morphological data, we have identified synapomorphies for the Sanchytrium‐Amoeboradix family and improved the species description of S. tribonematis Karpov et Aleoshin 2017 including more information on zoospore structure.…”

supporting

confidence: 57%

“…To investigate this, we have studied the morphology of zoospores and sporangia in two strains of S. tribonematis: X-126 and X-128, both from the Culture Collection of Parasitic Protists of the Zoological Institute, Russian Academy of Science (CCPP ZIN RAS) (Malysheva et al 2016). The two strains seemed to belong to the same species (Karpov et al 2017); accordingly, we did not find any morphological differences in zoospores, cysts, and sporangia by light and electron microscopy. Based on the newly generated morphological data, we have identified synapomorphies for the Sanchytrium-Amoeboradix family and improved the species description of S. tribonematis Karpov et Aleoshin 2017 including more information on zoospore structure.…”

mentioning

confidence: 46%

“…Taking into account the more complete morphological data obtained in this study as compared to previous work (Karpov et al 2017), we improve here the diagnoses of the genus Sanchytrium and the species S. tribonematis. Sanchytrium (Karpov et Aleoshin 2017) emend.…”

Section: Discussionmentioning

confidence: 82%

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

Karpov

Vishnyakov

Moreira

et al. 2019

J Eukaryotic Microbiology

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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.

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Section: Discussionsupporting

confidence: 91%

supporting

confidence: 57%

mentioning

confidence: 46%

Section: Discussionmentioning

confidence: 82%

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

Karpov

Vishnyakov

Moreira

et al. 2019

J Eukaryotic Microbiology

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“…Within the former 'chytrid' group, Monoblepharomycota is considered as a separate phylum comprising classes Hyaloraphidiomycetes, Monoblepharidomycetes and Sanchytriomycetes class nov., following the phylogenies in Powell and Letcher (2014) and Karpov et al (2017a). The treatment of the family Olpidiaceae within Olpidiomycota at the phylum level is warranted based on phylogenies and age, but its exact position remains uncertain (James et al 2006a;White et al 2006;Sekimoto et al 2011).…”

Section: Updated Classification Of Holomycota Including Fungimentioning

confidence: 99%

High-level classification of the Fungi and a tool for evolutionary ecological analyses

et al. 2018

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High-throughput sequencing studies generate vast amounts of taxonomic data. Evolutionary ecological hypotheses of the recovered taxa and Species Hypotheses are difficult to test due to problems with alignments and the lack of a phylogenetic backbone. We propose an updated phylum-and class-level fungal classification accounting for monophyly and divergence time so that the main taxonomic ranks are more informative. Based on phylogenies and divergence time estimates, we adopt phylum rank to Aphelidiomycota, Basidiobolomycota, Calcarisporiellomycota, Glomeromycota, Entomophthoromycota, Entorrhizomycota, Kickxellomycota, Monoblepharomycota, Mortierellomycota and Olpidiomycota. We accept nine subkingdoms to accommodate these 18 phyla. We consider the kingdom Nucleariae (phyla Nuclearida and Fonticulida) as a sister group to the Fungi. We also introduce a perl script and a newick-formatted classification backbone for assigning Species Hypotheses into a hierarchical taxonomic framework, using this or any other classification system. We provide an example of testing evolutionary ecological hypotheses based on a global soil fungal data set.

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Ciliary transition zone evolution and the root of the eukaryote tree: implications for opisthokont origin and classification of kingdoms Protozoa, Plantae, and Fungi

Cavalier-Smith

2021

Protoplasma

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I thoroughly discuss ciliary transition zone (TZ) evolution, highlighting many overlooked evolutionarily significant ultrastructural details. I establish fundamental principles of TZ ultrastructure and evolution throughout eukaryotes, inferring unrecognised ancestral TZ patterns for Fungi, opisthokonts, and Corticata (i.e., kingdoms Plantae and Chromista). Typical TZs have a dense transitional plate (TP), with a previously overlooked complex lattice as skeleton. I show most eukaryotes have centriole/TZ junction acorn-V filaments (whose ancestral function was arguably supporting central pair microtubule-nucleating sites; I discuss their role in centriole growth). Uniquely simple malawimonad TZs (without TP, simpler acorn) pinpoint the eukaryote tree's root between them and TP-bearers, highlighting novel superclades. I integrate TZ/ciliary evolution with the best multiprotein trees, naming newly recognised major eukaryote clades and revise megaclassification of basal kingdom Protozoa. Recent discovery of non-photosynthetic phagotrophic flagellates with genome-free plastids (Rhodelphis), the sister group to phylum Rhodophyta (red algae), illuminates plant and chromist early evolution. I show previously overlooked marked similarities in cell ultrastructure between Rhodelphis and Picomonas, formerly considered an early diverging chromist. In both a nonagonal tube lies between their TP and an annular septum surrounding their 9+2 ciliary axoneme. Mitochondrial dense condensations and mitochondrion-linked smooth endomembrane cytoplasmic partitioning cisternae further support grouping Picomonadea and Rhodelphea as new plant phylum Pararhoda. As Pararhoda/Rhodophyta form a robust clade on site-heterogeneous multiprotein trees, I group Pararhoda and Rhodophyta as new infrakingdom Rhodaria of Plantae within subkingdom Biliphyta, which also includes Glaucophyta with fundamentally similar TZ, uniquely in eukaryotes. I explain how biliphyte TZs generated viridiplant stellate-structures.

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Monoblepharidomycetes diversity includes new parasitic and saprotrophic species with highly intronized rDNA

Cited by 24 publications

References 46 publications

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

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

High-level classification of the Fungi and a tool for evolutionary ecological analyses

Ciliary transition zone evolution and the root of the eukaryote tree: implications for opisthokont origin and classification of kingdoms Protozoa, Plantae, and Fungi

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