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Specificity of C hroomonas ( C ryptophyceae) as a source of kleptochloroplast for N usuttodinium aeruginosum ( D inophyceae)
Author(s) -
Onuma Ryo,
Horiguchi Takeo
Publication year - 2016
Publication title -
phycological research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.438
H-Index - 44
eISSN - 1440-1835
pISSN - 1322-0829
DOI - 10.1111/pre.12117
Subject(s) - dinoflagellate , biology , subclade , genus , clade , phylogenetics , botany , zoology , evolutionary biology , biochemistry , gene
Summary The unarmoured dinoflagellate N usuttodinium aeruginosum retains a kleptochloroplast, which is a transient chloroplast stolen from members of the cryptomonad genus, C hroomonas . Both N . aeruginosum and the closely related N . acidotum have been shown to restrict their diet to a limited number of species of this blue‐green genus of cryptophyte. However, it is still unclear how flexible the predators are with regard to the ingestion and utilization of C hroomonas spp. as a source of kleptochloroplast. To address specificity of cryptomonad in N . aeruginosum , we collected the cells of N . aeruginosum from several ponds in J apan, and analysed the phylogeny of the kleptochloroplasts based on their plastidial 16S rDNA sequences. All sequences obtained in this study were restricted to only one (the subclade 4) of four subclades known to comprise the C hroomonas / H emiselmis clade. Therefore, N . aeruginosum is specific in its dietary requirements, selecting their prey within the subclade level.