Euduboscquella costata n. Sp. (Dinoflagellata, Syndinea), an Intracellular Parasite of the Ciliate Schmidingerella arcuata: Morphology, Molecular Phylogeny, Life Cycle, Prevalence, and Infection Intensity SCIE SCOPUS

Cited 11 time in WEB OF SCIENCE Cited 11 time in Scopus
Title
Euduboscquella costata n. Sp. (Dinoflagellata, Syndinea), an Intracellular Parasite of the Ciliate Schmidingerella arcuata: Morphology, Molecular Phylogeny, Life Cycle, Prevalence, and Infection Intensity
Author(s)
Jung, J.-H.; Choi, J.M.; Coats, D.W.; Kim, Y.-O.
KIOST Author(s)
Choi, Jung Min(최정민)Kim, Young Ok(김영옥)
Alternative Author(s)
최정민; 김영옥
Publication Year
2016
Abstract
The syndinean dinoflagellate Euduboscquella costata n. Sp., an intracellular parasite of the tintinnid ciliate Schmidingerella arcuata, was discovered from Korean coastal water in November of 2013. Euduboscquella costata parasitized in about 62% of the host population, with infection intensity (= number of trophonts in a single host cell) ranging from 1 to 8. Based on morphology and nuclear 18S ribosomal RNA gene sequences, the parasite is new to science. Euduboscquella costata n. Sp. had an infection cycle typical of the genus, but had morphological and developmental features that distinguished it from congeneric species. These features include: (1) episome of the trophont with 25-40 grooves converging toward the center of the shield; (2) a narrow, funnel-shaped lamina pharyngea extending from the margin of the episomal shield to the nucleus; (3) persistence of grooves during extracellular development (sporogenesis); (4) a single food vacuole during sporogenesis; (5) separation of sporocytes early in sporogenesis, regardless of type of spore formed; and (6) dinospore size (ca. 14 μm in length) and shape (bulbous episome with narrower, tapering hyposome). After sporogenesis, E. costata produced four different types of spore that showed completely identical 18S rRNA gene sequences. The gene sequence was completely identical with a previously reported population, Euduboscquella sp. ex S. Arcuata, from Assawoman Bay, USA, indicating that the two populations are likely conspecific. Favella ehrenbergii, a widely recorded tintinnid known to host Euduboscquella spp., co-occurred with S. Arcuata, but was not infected by E. costata in field samples or during short-term, cross-infection experiments. © 2015 The Author(s) Journal of Eukaryotic Microbiology.
ISSN
1066-5234
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/40388
DOI
10.1111/jeu.12231
Bibliographic Citation
Journal of Eukaryotic Microbiology, v.63, no.1, pp.3 - 15, 2016
Publisher
Blackwell Publishing Inc.
Subject
Ciliophora; Dinophyceae; Favella ehrenbergii; Tintinnida; protozoal RNA; ribosome DNA; RNA 18S; sea water; ciliate; classification; cytology; dinoflagellate; DNA sequence; genetics; host range; isolation and purification; life cycle stage; parasitology; phylogeny; physiology; Ciliophora; Dinoflagellida; DNA, Ribosomal; Host Specificity; Life Cycle Stages; Phylogeny; RNA, Protozoan; RNA, Ribosomal, 18S; Seawater; Sequence Analysis, DNA
Keywords
18S ribosomal RNA; marine intracellular parasite; plankton; Syndinean dinoflagellate; tintinnid
Type
Article
Language
English
Document Type
Article
Publisher
Blackwell Publishing Inc.
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