Titel
Seasonal dynamics of a complex cheilostome bryozoan symbiosis: vertical transfer challenged
Autor*in
E. A. Bogdanov
Department of Invertebrate Zoology, Faculty of Biology, Saint Petersburg State University
A. E. Vishnyakov
Department of Invertebrate Zoology, Faculty of Biology, Saint Petersburg State University
O. N. Kotenko
Department of Invertebrate Zoology, Faculty of Biology, Saint Petersburg State University
... show all
Abstract
Symbiotic associations are dynamic systems influenced by both intrinsic and extrinsic factors. Here we describe for the first time the developmental and seasonal changes of the funicular bodies in the bryozoan Dendrobeania fruticosa, which are unique temporary organs of cheilostome bryozoans containing prokaryotic symbionts. Histological and ultrastructural studies showed that these organs undergo strong seasonal modification in the White Sea during the ice-free period. Initially (in June) they play a trophic function and support the development of a large population of bacteria. From June to September, both funicular bodies and bacteria show signs of degradation accompanied by development of presumed virus-like particles (VLPs); these self-organize to hollow spheres inside bacteria and are also detected outside of them. Although the destruction of bacteria coincides with the development of VLPs and spheres, the general picture differs considerably from the known instances of bacteriophagy in bryozoans. We broadly discuss potential routes of bacterial infection in Bryozoa and question the hypothesis of vertical transfer, which, although widely accepted in the literature, is contradicted by molecular, morphological and ecological evidence.
Stichwort
BacteriaEnvironmental microbiologyMicrobial ecologyPhage biologyZoology
Objekt-Typ
Sprache
Englisch [eng]
Persistent identifier
Erschienen in
Titel
Scientific Reports
Band
13
ISSN
2045-2322
Erscheinungsdatum
2023
Publication
Springer Science and Business Media LLC
Erscheinungsdatum
2023
Zugänglichkeit
Rechte
Rechteangabe
© The Author(s) 2023
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