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Molecular basis of flowering initiation and repression by florigen

Research Project

Project/Area Number 18K06083
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 43020:Structural biochemistry-related
Research InstitutionKyoto University

Principal Investigator

Ohki Izuru  京都大学, 化学研究所, 特定研究員 (80418574)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords立体構造解析 / 植物ホルモン / 花成 / フロリゲン / 構造生物学 / 育種
Outline of Final Research Achievements

Florigen is a flowering hormone that determines when plants bloom. We have discovered the florigen receptor, determined the structure of the activation complex with florigen, and elucidated the flowering promotion mechanism (Taoka, Ohki, Tsuji et al., Nature 2011). Recently, we found that this receptor suppresses flowering through interaction with a flowering repressor during the vegetative state. In this study, we analyzed the flowering-suppressing complex consisting of a flowering repressor and the receptor, and succeeded in determining the molecular structure with high resolution. From the structural comparison and biochemical assay of both complexes, we constructed a model of the flowering promotion/suppression mechanism in which the florigen and rthe epressor compete and replace on the receptor surface.

Academic Significance and Societal Importance of the Research Achievements

我々は植物の花成研究において、フロリゲンを同定し、新規な受容体を発見し、間違いなく世界に先んじている。特に同定されたばかりの受容体の情報を独占的に用いて研究を進められる事は非常に大きなアドバンテージである。本研究はイネのフロリゲン研究のこれまでの蓄積を生かし、さらに世界をリードするフロリゲン生物学の展開を目指すものであり、研究手法も原子レベルの立体構造解析から細胞、個体レベルの機能解析、植物改良まで含む複合的な研究である。フロリゲンを用いて改良した作物は遺伝子組換え技術を用いないため、現実的な食糧増産対策になり、産業に与える影響は極めて大きい。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (18 results)

All 2021 2020 2019 2018 Other

All Int'l Joint Research (1 results) Journal Article (5 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 5 results,  Open Access: 5 results) Presentation (12 results) (of which Int'l Joint Research: 1 results,  Invited: 5 results)

  • [Int'l Joint Research] ETH Zurich(スイス)

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Room-temperature hyperpolarization of polycrystalline samples with optically polarized triplet electrons: pentacene or nitrogen-vacancy center in diamond?2021

    • Author(s)
      K. Miyanishi, T. F. Segawa, I. Ohki, S. Onoda, T. Ohshima, H. Abe, H. Takashima, S. Takeuchi, Y. Wang, K. Takeda, F. T.-K. So, D. Terada, R. Igarashi, A. Kagawa, M. Kitagawa, N. Mizuochi, M. Shirakawa, and M. Negoro
    • Journal Title

      Magnetic Resonance

      Volume: 2 Issue: 1 Pages: 33-48

    • DOI

      10.5194/mr-2-33-2021

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Ultra-long coherence times amongst room-temperature solid-state spins2019

    • Author(s)
      Herbschleb E. D.、Kato H.、Maruyama Y.、Danjo T.、Makino T.、Yamasaki S.、Ohki I.、Hayashi K.、Morishita H.、Fujiwara M.、Mizuochi N.
    • Journal Title

      Nature Communications

      Volume: 10 Issue: 1 Pages: 1-6

    • DOI

      10.1038/s41467-019-11776-8

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Backbone and side-chain resonance assignments of the methyl-CpG-binding domain of MBD6 from Arabidopsis thaliana2018

    • Author(s)
      Iwakawa Naoto、Mahana Yutaka、Ono Arina、Ohki Izuru、Walinda Erik、Morimoto Daichi、Sugase Kenji、Shirakawa Masahiro
    • Journal Title

      Biomolecular NMR Assignments

      Volume: 13 Issue: 1 Pages: 59-62

    • DOI

      10.1007/s12104-018-9851-2

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Cooperative Domain Formation by Homologous Motifs in HOIL-1L and SHARPIN Plays A Crucial Role in LUBAC Stabilization2018

    • Author(s)
      Fujita Hiroaki、Tokunaga Akira、Shimizu Satoshi、Whiting Amanda L.、Aguilar-Alonso Francisco、Takagi Kenji、Walinda Erik、Sasaki Yoshiteru、Shimokawa Taketo、Mizushima Tsunehiro、Ohki Izuru、Ariyoshi Mariko、Tochio Hidehito、Bernal Federico、Shirakawa Masahiro、Iwai Kazuhiro
    • Journal Title

      Cell Reports

      Volume: 23 Issue: 4 Pages: 1192-1204

    • DOI

      10.1016/j.celrep.2018.03.112

    • NAID

      120006460107

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] TFL1-Like Proteins in Rice Antagonize Rice FT-Like Protein in Inflorescence Development by Competition for Complex Formation with 14-3-3 and FD.2018

    • Author(s)
      Kaneko-Suzuki M, Kurihara-Ishikawa R, Okushita-Terakawa C, Kojima C, Nagano-Fujiwara M, Ohki I, Tsuji H, Shimamoto K, Taoka KI.
    • Journal Title

      Plant Cell Physiol.

      Volume: 59 Issue: 3 Pages: 458-468

    • DOI

      10.1093/pcp/pcy021

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 爆轟法ナノダイヤモンド中のSiV中心を用いた温度センシング2021

    • Author(s)
      内田岳、藤原正規、大木出、鶴井明彦、劉明、西川正浩、水落憲和
    • Organizer
      第68回応用物理学会春季学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] ダイヤモンド中のNV中心でのドレスト状態による温度センシング2021

    • Author(s)
      中村将也、山下峻吾、森下弘樹、藤原正規、大木出、Ernst Herbschleb、徳田規夫、水落憲和
    • Organizer
      第68回応用物理学会春季学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] NV中心量子センサのための広領域・広帯域マイクロ波アンテナの研究開発2021

    • Author(s)
      竹村祐輝、林寛、小野田忍、阿部浩之、大島武、谷口尚、藤原正規、森下弘樹、大木出、水落憲和
    • Organizer
      第68回応用物理学会春季学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Phosphorus-doped diamond: ultra-long coherence times and high magnetic sensitivity with nitrogen-vacancy centres2020

    • Author(s)
      Ernst D.Herbschleb、 Hiromitsu Kato、 Yuichi Maruyama、 Takuya Danjo、 Toshiharu Makino、 Satoshi Yamasaki、 Izuru Ohki、 Kan Hayashi、 Hiroki Morishita、 Masanori Fujiwara、 Norikazu Mizuochi
    • Organizer
      Hasselt Diamond Workshop 2020 - SBDD XXV
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Single NV centres in phosphorus-doped diamond display the longest coherence times and highest sensitivities at room temperature2020

    • Author(s)
      E. D. Herbschleb, H. Kato, Y. Maruyama, T. Danjo, T. Makino, S. Yamasaki, I. Ohki, K. Hayashi, H. Morishita, M. Fujiwara, N. Mizuochi
    • Organizer
      Spin-RNJ若手オンライン研究発表会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] ダイヤモンドNV中心と量子技術を使ったピコリットルNMRによる生体分子観察2020

    • Author(s)
      大木 出、森田 航希、藤原 正規、水落 憲和
    • Organizer
      量子生命科学会第2回大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Formation of Nitrogen-Vacancy centers in nanodiamonds: Size and type dependence2020

    • Author(s)
      S.Frederick, A.Shames, D.Terada, T.Genjo, H.Morishita, I.Ohki, T.Oshima, S.Onoda, H.Takahsima, S.Takeuchi, E.Osawa, N.Mizuochi, R.Igarashi, M.Shirakawa, T.Segawa
    • Organizer
      量子生命科学会第2回大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] ダイヤモンドNV 中心を使ったピコリットルNMRと単一細胞測定への展開2020

    • Author(s)
      森田航希,大木出,藤原正規,中野裕太, 吉本智貴,徳田規夫,水落憲和
    • Organizer
      第59回NMR討論会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 室温下でのダイヤモンド中NV中心とペンタセンによる13C pulsed-DNP2020

    • Author(s)
      宮西孝一郎,Takuya F. Segawa,大木出,小野田忍,大島武,阿部浩之,高島秀聡, 竹内繁樹,武田和行,Frederick T.-K. So,寺田大紀,五十嵐龍治,香川晃徳, 北川勝浩,水落憲和,白川昌宏,根来誠
    • Organizer
      第59回NMR討論会
    • Related Report
      2020 Annual Research Report
  • [Presentation] ダイヤモンドNV中心を使ったナノスケールの溶液NMR2019

    • Author(s)
      大木出、森田航希、藤原正規、森下弘樹、白川昌宏、水落憲和
    • Organizer
      第58回NMR討論会・SEST2019連合大会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 溶液NMRにおける生体高分子の核超偏極技術の開発2018

    • Author(s)
      大木出, 藤咲貴大, 池上貴久, 白川昌宏, 水落憲和
    • Organizer
      第57回NMR討論会
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] 量子技術で生体高分子の三次元構造動態を 見るーin vitroから細胞・生体まで2018

    • Author(s)
      大木出
    • Organizer
      量子科学技術研究開発機構放射線影響研究部影響研究部セミナー
    • Related Report
      2018 Research-status Report
    • Invited

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Published: 2018-04-23   Modified: 2022-01-27  

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