TY - JOUR

T1 - Kinetid Structure of Aphelidium and Paraphelidium (Aphelida) Suggests the Features of the Common Ancestor of Fungi and Opisthosporidia

AU - Karpov, Sergey A.

AU - Cvetkova, Victoria S.

AU - Annenkova, Nataliia V.

AU - Vishnyakov, Andrey E.

PY - 2019/11

Y1 - 2019/11

N2 - The aphelids (phylum Aphelida) are phagotrophic parasitoids of algae and represent the most basal branch in superphylum Opisthosporidia, which contains the Microsporidia, Rozellosporidia and Aphelida. Being the closest group to traditional fungi, the aphelids should have ancestral features of both phyla. As in chytrids and other zoosporic fungi, the structure of zoospores is the most informative and important morphological feature for the phylogeny and taxonomy of aphelids. Though a general zoospore description exists for some aphelid species, their flagellar apparatus (kinetid) structure, which contains pivotal taxonomic and phylogenetic characters, has not been studied. Here we represent the kinetid structure in two genera, Aphelidium and Paraphelidium, and demonstrate independent reduction in the kinetid in each genus. The kinetid-mitochondrion connection found in Aphelidium and Paraphelidium is rare for opisthokonts in general, but present in the most basal branches of Fungi and Opisthosporidia. We suggest, therefore, that this connection represents an ancestral character for both these phyla.

AB - The aphelids (phylum Aphelida) are phagotrophic parasitoids of algae and represent the most basal branch in superphylum Opisthosporidia, which contains the Microsporidia, Rozellosporidia and Aphelida. Being the closest group to traditional fungi, the aphelids should have ancestral features of both phyla. As in chytrids and other zoosporic fungi, the structure of zoospores is the most informative and important morphological feature for the phylogeny and taxonomy of aphelids. Though a general zoospore description exists for some aphelid species, their flagellar apparatus (kinetid) structure, which contains pivotal taxonomic and phylogenetic characters, has not been studied. Here we represent the kinetid structure in two genera, Aphelidium and Paraphelidium, and demonstrate independent reduction in the kinetid in each genus. The kinetid-mitochondrion connection found in Aphelidium and Paraphelidium is rare for opisthokonts in general, but present in the most basal branches of Fungi and Opisthosporidia. We suggest, therefore, that this connection represents an ancestral character for both these phyla.

KW - Flagellar apparatus

KW - molecular phylogeny

KW - opisthosporidia

KW - parasitoids

KW - ultrastructure

KW - zoospore

KW - AMOEBOAPHELIDIUM-PROTOCOCCARUM

KW - ZOOSPORE

KW - ULTRASTRUCTURE

KW - MOLECULAR PHYLOGENY

KW - MORPHOLOGY

KW - TOOL

UR - http://www.scopus.com/inward/record.url?scp=85066466569&partnerID=8YFLogxK

UR - http://www.mendeley.com/research/kinetid-structure-aphelidium-paraphelidium-aphelida-suggests-features-common-ancestor-fungi-opisthos

U2 - 10.1111/jeu.12742

DO - 10.1111/jeu.12742

M3 - Article

AN - SCOPUS:85066466569

VL - 66

SP - 911

EP - 924

JO - Journal of Eukaryotic Microbiology

JF - Journal of Eukaryotic Microbiology

SN - 1066-5234

IS - 6

ER -