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The seagrass Zostera marina harbors growth-inhibiting bacteria against the toxic dinoflagellate Alexandrium tamarense

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/57672

Title: The seagrass Zostera marina harbors growth-inhibiting bacteria against the toxic dinoflagellate Alexandrium tamarense
Authors: Onishi, Yuka Browse this author
Mohri, Yuka Browse this author
Tuji, Akihiro Browse this author →KAKEN DB
Ohgi, Kohei Browse this author
Yamaguchi, Atsushi Browse this author →KAKEN DB
Imai, Ichiro Browse this author →KAKEN DB
Keywords: Toxic blooms
Alexandrium tamarense
Algicidal bacteria
Seagrass
Zostera marina
Mitigation
Prevention
Issue Date: Mar-2014
Publisher: Springer Japan
Journal Title: Fisheries Science
Volume: 80
Issue: 2
Start Page: 353
End Page: 362
Publisher DOI: 10.1007/s12562-013-0688-4
Abstract: Seagrasses are known to have allelopathic activity to reduce growth of phytoplankton. We found growth-inhibiting bacteria (strains E8 and E9) from Zostera marina possessing strong activity against the toxic dinoflagellate Alexandrium tamarense. Strain E9 markedly inhibited growth of A. tamarense even with initial inoculum size as small as 2.9 cells ml(-1). This bacterium also had growth-inhibiting effects on the red-tide raphidophytes Chattonella antiqua and Heterosigma akashiwo, the dinoflagellate Heterocapsa circularisquama, and the diatom Chaetoceros mitra. Small subunit (SSU) ribosomal DNA (rDNA) sequencing analysis demonstrated that the most probable affiliation of these strains was Flavobacteriaceae, and proved that another inhibitory bacterial strain (E8) was the same species as strain E9. Two other bacterial strains (E4-2 and E10), showing different colony color and isolated from the same seagrass sample, revealed no growth-inhibiting activity. Interestingly, strain E4-2 showed the same sequences as E8 and E9 (100 %), and strain E10 matched E8 and E9 with 99.80 % similarity. Growth-inhibiting bacteria against the toxic dinoflagellate Alexandrium tamarense associated with seagrass, such as Flavobacterium spp. E8 and E9, are able to repress shellfish poisoning besides the allelopathic activity of seagrass itself.
Rights: The original publication is available at www.springerlink.com
Type: article (author version)
URI: http://hdl.handle.net/2115/57672
Appears in Collections:水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 今井 一郎

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