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Pigment compositions are linked to the habitat types in dinoflagellates

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Title: Pigment compositions are linked to the habitat types in dinoflagellates
Authors: Yamada, Norico Browse this author
Tanaka, Ayumi Browse this author
Horiguchi, Takeo Browse this author
Keywords: Benthic
Issue Date: Nov-2015
Publisher: Springer
Journal Title: Journal of plant research
Volume: 128
Issue: 6
Start Page: 923
End Page: 932
Publisher DOI: 10.1007/s10265-015-0745-4
PMID: 26243150
Abstract: Compared to planktonic species, there is little known about the ecology, physiology, and existence of benthic dinoflagellates living in sandy beach or seafloor environments. In a previous study, we discovered 13(2),17(3)-cyclopheophorbide a enol (cPPB-aE) from sand-dwelling benthic dinoflagellates. This enol had never been detected in phytoplankton despite the fact that it is a chlorophyll a catabolite. We speculated from this discovery that habitat selection might be linked to pigment compositions in dinoflagellates. To test the hypothesis of habitat selection linking to pigment compositions, we conducted extensive analysis of pigments with high performance liquid chromatography (HPLC) for 40 species using 45 strains of dinoflagellates including three habitat types; sand-dwelling benthic forms, tidal pool inhabitants and planktonic species. The 40 dinoflagellates are also able to be distinguished into two types based on their chloroplast origins; red alga-derived secondary chloroplasts and diatom-derived tertiary ones. By plotting the pigments profiles onto three habitats, we noticed that twelve pigments including cPPB-aE were found to occur only in benthic sand-dwelling species of red alga-derived type. The similar tendency was also observed in dinoflagellates with diatom-derived chloroplasts, i.e. additional sixteen pigments including chl c (3) were found only in sand-dwelling forms. This is the first report of the occurrence of chl c (3) in dinoflagellates with diatom-derived chloroplasts. These results clarify that far greater diversity of pigments are produced by the dinoflagellates living in sand regardless of chloroplast types relative to those of planktonic and tidal pool forms. Dinoflagellates seem to produce a part of their pigments in response to their habitats.
Rights: The final publication is available at Springer via[10.1007/s10265-015-0745-4]
Type: article (author version)
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 堀口 健雄

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