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Study on the marine ecological role of labyrinthyulids

Research Project

Project/Area Number 17H03855
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Aquatic bioproduction science
Research InstitutionKonan University

Principal Investigator

Honda Daiske  甲南大学, 理工学部, 教授 (30322572)

Co-Investigator(Kenkyū-buntansha) 菊地 淳  国立研究開発法人理化学研究所, 環境資源科学研究センター, チームリーダー (00321753)
桑田 晃  国立研究開発法人水産研究・教育機構, 東北区水産研究所, グループ長 (40371794)
上田 真由美  地方独立行政法人大阪府立環境農林水産総合研究所(環境研究部、食と農の研究部及び水産研究部), その他部局等, 技師 (60803997)
長井 敏  国立研究開発法人水産研究・教育機構, 中央水産研究所, グループ長 (80371962)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000)
Fiscal Year 2019: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2018: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2017: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Keywords海洋生態系 / 微生物ループ / 原生生物 / ラビリンチュラ類 / 食物連鎖 / 多価不飽和脂肪酸 / DHA / 微細藻類 / 珪藻 / 捕食 / 物質循環 / 海洋生態 / 水産学 / ヤブレツボカビ類
Outline of Final Research Achievements

We conducted two-membered culture experiments with labyrinthuleans and micro-algae, such as diatoms, haptophytes etc., to discover where labyrinthuleans, especially aplanochytrids, obtain their nutrients by their ectoplasmic nets from. Labyrinthuleans are newly recognized as primary predators in marine ecosystems. As the results of measurement of the labyrinthulean biomass in the coastal to outer oceans, aplanochytrids exist as a relatively abundant cell density from the surface layer to the deep layer. And aplanochytrids were detected as a major prey of the copepods. Therefore, the labyrinthuleans are suggested to greatly affect the marine ecosystem.

Academic Significance and Societal Importance of the Research Achievements

DHAやEPAなどは,脳や網膜などに多く含まれる機能的な多価不飽和脂肪酸であるが,ヒトは十分な生合成ができずに,豊富に含まれている魚類などからの摂取に頼っている。しかしながら,魚類も生合成ができないため,食物連鎖の中で蓄積していると考えられているが,海洋生態系において,根本となる供給者が何かについては明確になっていない。ラビリンチュラ類は多価不飽和脂肪酸を豊富に細胞内に蓄積することが知られており,本研究によって,ラビリンチュラ類が微細藻類を広く栄養源して豊富に存在することから,DHA供給に関係する未解明の海洋生態系の経路の存在を示唆することができた。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • Research Products

    (33 results)

All 2020 2019 2018 2017 Other

All Journal Article (5 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (25 results) (of which Int'l Joint Research: 10 results,  Invited: 2 results) Remarks (2 results) Funded Workshop (1 results)

  • [Journal Article] Taming chlorophylls allowed eukaryotes to prosper on the oxygenated Earth.2019

    • Author(s)
      Kashiyama Y, Yokoyama A, Shiratori T, Bachy C, Gutierrez-Rodriguez A, Not F, Hess S, Wang M, Chen M, Gong Y, Seto K, Kagami M, Hamamoto Y, Honda D, Umetani T, Shihongi A, Kayama M, Matsuda T, Taira J, Yabuki A, Tsuchiya M, Hirakawa Y, Kawaguchi A, Nomura M, Nakamura A, Namba N, Matsumoto M, Tanaka T, Yoshino T et al.
    • Journal Title

      The ISME journal

      Volume: - Issue: 8 Pages: 1-12

    • DOI

      10.1038/s41396-019-0377-0

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Nutritional intake of Aplanochytrium (Labyrinthulea, Stramenopiles) from living diatoms revealed by culture experiments suggesting the new prey?predator interactions in the grazing food web of the marine ecosystem2019

    • Author(s)
      Hamamoto Yoko、Honda Daiske
    • Journal Title

      PLOS ONE

      Volume: 14 Issue: 1 Pages: e0208941-e0208941

    • DOI

      10.1371/journal.pone.0208941

    • Related Report
      2019 Annual Research Report 2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Possible aplanochytrid (Labyrinthulea) prey detected using 18S metagenetic diet analysis in the key copepod species <i>Calanus sinicus</i> in the coastal waters of the subtropical western North Pacific2018

    • Author(s)
      Junya Hirai, Yoko Hamamoto, Daiske Honda, Kiyotaka Hidaka
    • Journal Title

      Plankton and Benthos Research

      Volume: 13 Issue: 2 Pages: 75-82

    • DOI

      10.3800/pbr.13.75

    • NAID

      130006744038

    • ISSN
      1880-8247, 1882-627X
    • Year and Date
      2018-05-30
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Nutritional Intake by Ectoplasmic Nets of Schizochytrium aggregatum (Labyrinthulomycetes, Stramenopiles)2018

    • Author(s)
      Iwata Izumi、Honda Daiske
    • Journal Title

      Protist

      Volume: 169 Issue: 5 Pages: 727-743

    • DOI

      10.1016/j.protis.2018.06.002

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Labyrinthulomycota2017

    • Author(s)
      Bennett Reuel M.、Honda D.、Beakes Gordon W.、Thines Marco
    • Journal Title

      Handbook of Protists

      Volume: 1 Pages: 507-542

    • DOI

      10.1007/978-3-319-28149-0_25

    • ISBN
      9783319281476, 9783319281490
    • Related Report
      2017 Annual Research Report
  • [Presentation] エレクトロポレーション法を用いた,Parietichytrium sp.(ラビリンチュラ類)への遺伝子導入の試み2020

    • Author(s)
      馬詰 悠,石橋 洋平,伊東 信,早川 靖彦,本多 大輔
    • Organizer
      日本藻類学会第44回大会(鹿児島)みなし発表
    • Related Report
      2019 Annual Research Report
  • [Presentation] ラビリンチュラ類Aplanochytrium属株が栄養源とできる藻類の多様性2020

    • Author(s)
      宮岡 利樹,茂木 大地,本多 大輔
    • Organizer
      日本藻類学会第44回大会(鹿児島)みなし発表
    • Related Report
      2019 Annual Research Report
  • [Presentation] STUDIES ON ECOLOGICAL ROLE AND EFFECT OF LABYRINTHULIDS IN MARINE ENVIRONMENT (LABYRINTHULEA, STRAMENOPILES)2019

    • Author(s)
      Yoko Hamamoto, Takanori Shono, Ryosuke Nakai, Mayumi Ueda, Satoshi Nagai, and Daiske Honda
    • Organizer
      International Symposium on Aquatic Metagenomics
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Metabarcoding diet analysis for revealing predator-prey relationships during the spawning period of Japanese sardine and Pacific round herring in Tosa Bay2019

    • Author(s)
      Junya Hirai, Yoko Hamamoto, Diske Honda, Kiyotaka Hidaka, Satoshi Nagai and Tadafumi Ichikawa
    • Organizer
      PICES 2019 Annual Meeting
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 海洋真核生物ラビリンチュラ類の生態学的役割と影響2019

    • Author(s)
      浜本 洋子, 庄野 孝範, 中井 亮佑, 上田 真由美, 長井 敏, 本多 大輔
    • Organizer
      日本微生物生態学会第33回大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] DHAを蓄積する海洋真核生物ラビリンチュラ類の生態学的役割2019

    • Author(s)
      浜本洋子,庄野孝範,中井亮佑,上田真由美,長井敏,桑田晃,菊地淳,本多大輔
    • Organizer
      令和元年度漁場環境保全関係研究開発推進会議 赤潮・貝毒部会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Studies on ecological role and effect of labyrinthulids in marine environment (Labyrinthulea, Stramenopiles)2019

    • Author(s)
      Yoko Hamamoto, Takanori Shono, Ryosuke Nakai, Mayumi Ueda, Satoshi Nagai, and Daiske Honda
    • Organizer
      First International Conference on Labyrinthulean Protists
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Distribution of a novel sphingolipid, ceramide glyoxylic ethanolamine (CGE), in thraustochytrids2019

    • Author(s)
      Minato Kasari, Natsumi Hasegawa, Yohei Ishibashi, Tomofumi Miyamoto, Masahiro Hayashi, Daiske Honda, Nozomu Okino, and Makoto Ito
    • Organizer
      First International Conference on Labyrinthulean Protists
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Search for nutrients required for growth of the strains of “difficult-to-culture” aplanochytrids2019

    • Author(s)
      Toshiki Miyaoka, Ryosuke Nakai, and Daiske Honda
    • Organizer
      First International Conference on Labyrinthulean Protists
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Examination of quantitative PCR to quantify the abundance of oblongichytrids in marine environment2019

    • Author(s)
      Tomi Morimoto, Yoko Hamamoto, Mayumi Ueda and Daiske Honda
    • Organizer
      First International Conference on Labyrinthulean Protists
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Characterization of novel eicosapentaenoic acid producing thraustochytrid2019

    • Author(s)
      Yui Takeuchi, Ayako Matsuda, Daiske Honda, Takayoshi Sekiguchi, Li Han, and Masahiro Hayashi
    • Organizer
      First International Conference on Labyrinthulean Protists
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Examination of the condition in the gene transfer into Parietichytrium cells by electroporation (Labyrinthulea, Stramenopiles)2019

    • Author(s)
      Haruka Umazume, Yohei Ishibashi, Makoto Ito, Yasuhiko Hayakawa, and Daiske Honda
    • Organizer
      First International Conference on Labyrinthulean Protists
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Examination of the condition of CARD-FISH for specific detection of the aplanochytrid cells2019

    • Author(s)
      Haruka Nakamura, Runa Mori, Yoko Hamamoto, Takanori Shono, Akira Kuwata, and Daiske Honda
    • Organizer
      First International Conference on Labyrinthulean Protists
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ラビリンチュラ類の生態学的役割とその影響2019

    • Author(s)
      浜本 洋子, 庄野 孝範, 中井 亮佑, 上田 真由美, 長井 敏,本多 大輔
    • Organizer
      日本藻類学会第43回京都大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] ラビリンチュラ類Aplanochytrium が栄養源とする藻類の検討と物質転送2019

    • Author(s)
      茂木大地, 浜本洋子,今井博之,本多大輔
    • Organizer
      日本藻類学会第43回京都大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] ラビリンチュラ類Aplanochytrium 属株の外質ネットを用いた珪藻からの栄養摂取2019

    • Author(s)
      髙橋 遼,本多 大輔
    • Organizer
      日本藻類学会第43回京都大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 原生生物ラビリンチュラ類の 現存量から推定された海洋生態系における影響力2018

    • Author(s)
      浜本 洋子, 庄野 孝範, 中井 亮佑, 上田 真由美, 本多 大輔
    • Organizer
      日本微生物生態学会 第32回大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Aplanochytrium 属群の現存量から推定された海洋生態系における影響力2018

    • Author(s)
      浜本 洋子, 庄野 孝範, 中井 亮佑, 上田 真由美, 本多 大輔
    • Organizer
      第5回ラビリンチュラシンポジウム
    • Related Report
      2018 Annual Research Report
  • [Presentation] ラビリンチュラ類の属間におけるセルラーゼ活性の比較2018

    • Author(s)
      田中 美穂,本多大輔
    • Organizer
      第5回ラビリンチュラシンポジウム
    • Related Report
      2018 Annual Research Report
  • [Presentation] Aplanochytrium が栄養摂取の対象とする藻類の検討2018

    • Author(s)
      茂木大地, 浜本洋子,本多大輔
    • Organizer
      第5回ラビリンチュラシンポジウム
    • Related Report
      2018 Annual Research Report
  • [Presentation] ラビリンチュラ類の現存量の把握に向けたアプローチ2018

    • Author(s)
      浜本 洋子,庄野 孝範,中井 亮佑,上田 真由美,本多 大輔
    • Organizer
      日本藻類学会第42回仙台大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] ラビリンチュラ類の外質ネットによる栄養摂取2017

    • Author(s)
      本多大輔,浜本洋子,岩田いづみ
    • Organizer
      第4回 ラビリンチュラ シンポジウム
    • Related Report
      2017 Annual Research Report
  • [Presentation] ラビリンチュラ類の定量PCR法を用いた現存量推定に向けた取り組み2017

    • Author(s)
      浜本洋子,庄野孝範,中井亮佑,山本圭吾,本多大輔
    • Organizer
      第4回 ラビリンチュラ シンポジウム
    • Related Report
      2017 Annual Research Report
  • [Presentation] Nutrient intakes of thraustochytrids (Labyrinthulea) by their ectoplasmic nets.2017

    • Author(s)
      Honda, D., Hamamoto, Y., Iwata, I.
    • Organizer
      15th International Congress of Protistology
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Nutrition of thraustochytrids (Labyrinthulea) by their ectoplasmic nets2017

    • Author(s)
      Honda, D., Hamamoto, Y., Iwata, I.
    • Organizer
      第55 回日本生物物理学会年会
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Remarks] ICoLP

    • URL

      http://syst.bio.konan-u.ac.jp/icolp/index_en.html

    • Related Report
      2019 Annual Research Report
  • [Remarks] Laby Base

    • URL

      http://syst.bio.konan-u.ac.jp/labybase/

    • Related Report
      2019 Annual Research Report 2018 Annual Research Report 2017 Annual Research Report
  • [Funded Workshop] First International Conference on Labyrinthulean Protists2019

    • Related Report
      2019 Annual Research Report

URL: 

Published: 2017-04-28   Modified: 2021-02-19  

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