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Specificity of two temperate dinoflagellate-anthozoan associations from the north-western Pacific Ocean

Title
Specificity of two temperate dinoflagellate-anthozoan associations from the north-western Pacific Ocean
Authors
Rodriguez-Lanetty M.Chang S.-J.Song J.-I.
Ewha Authors
송준임
SCOPUS Author ID
송준임scopus
Issue Date
2003
Journal Title
Marine Biology
ISSN
0025-3162JCR Link
Citation
vol. 143, no. 6, pp. 1193 - 1199
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Whilst many studies of symbiotic dinoflagellate diversity have focused on tropical reef environments, only a few have explored the degree and pattern of divergence of these endosymbionts at high latitudes. In this study, the genetic diversity and specificity of symbiotic dinoflagellates associated with two common anthozoan hosts in the north-western Pacific Ocean was studied in four different seasons during a period of 1 year. Partial nucleotide sequences of 28S and complete ITS1 ribosomal DNA regions were used to identify, genetically, the endosymbionts extracted from the scleractinian Alveopora japonica and the actinarian Heteractis sp. A. japonica harbours symbionts belonging to Symbiodinium of clade F, while Heteractis sp. associates with Symbiodinium of clade C. Moreover, no seasonal changes in the endosymbiont community were detected in these two associations during this study. This is the first evidence that these two temperate cnidarian-microalgae symbioses are stable. Furthermore, we tested the apparent specificity of the Heteractis sp. - Symbiodinium sp. clade C association, by performing alga-infection experiments with aposymbiotic hosts, and monitoring the uptake and persistence of homologous and heterologous symbionts. The findings confirm the association patterns detected in the field and show that Heteractis sp. only establishes a successful association with Symbiodinium cells of clade C, at least among the heterologous symbionts occurring in the study area. Our results are consistent with the idea that selective pressures in highly fluctuating temperate environments might have granted symbiosis-specificity an adaptive value.
DOI
10.1007/s00227-003-1165-x
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자연과학대학 > 생명과학전공 > Journal papers
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