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Molecular mechanisms and physiological roles of long-distance cytokinin transport

Publicly Offered Research

Project AreaIntegrative system of autonomous environmental signal recognition and memorization for plant plasticity
Project/Area Number 16H01477
Research Category

Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

Allocation TypeSingle-year Grants
Review Section Biological Sciences
Research InstitutionInstitute of Physical and Chemical Research

Principal Investigator

木羽 隆敏  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, 研究員 (20532097)

Project Period (FY) 2016-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥10,530,000 (Direct Cost: ¥8,100,000、Indirect Cost: ¥2,430,000)
Fiscal Year 2017: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2016: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Keywords長距離シグナリング / サイトカイニン / 道管 / ABCG14 / 長距離輸送 / 維管束
Outline of Annual Research Achievements

サイトカイニン(CK)は植物の成長・発達の様々な過程の制御に不可欠な植物ホルモンであり、局所シグナルとして作用するだけでなく、維管束を介して長距離輸送され、器官間(長距離)シグナルとしても重要な役割をもつ。本研究では、CKの長距離輸送を介した個体統御メカニズムの解明を目指し、(1)CKの維管束への積み込みの分子メカニズムと(2)CK長距離輸送の生理的役割の観点からアプローチした。特に根から地上部への道管を介した長距離輸送に注目した。
(1)ABCG14はCKの道管への積み込みに必須の因子であるが、基質特異性や輸送方向などの生化学的特性や機能組織など、詳しい働き方は分かっていない。我々はT87シロイヌナズナ培養細胞に誘導発現コンストラクトを導入した実験系を構築し、ABCG14がCK前駆体の排出に関わることを強く示唆する結果を得た。またabcg14背景でABCG14を組織特異的に発現する形質転換体を用いて表現型の回復を評価した結果、ABCG14が維管束で働くことが道管へのCK積み込みに重要であることが示唆された。ABCG14は維管束でCK前駆体を細胞外に排出することにより、道管へのCK積み込みを司ると考えられる。
(2)根から地上部への道管を介したtZ型CKの輸送は、地上部の正常な成長・発達に欠かせない。道管液中の主要なCK分子種は前駆体tZRと活性型tZであるが、それらの生理的役割については不明であった。我々は、CK輸送・代謝系の変異体と接ぎ木を組み合わせることにより、tZRとtZの輸送の影響を区別して評価できる実験系を構築した。それにより、根由来のtZRとtZは異なった生理作用を持つことを明らかにし、論文化した。このようなCK分子種の使い分けは、環境変化に応じた個体統御システムを構成する重要なメカニズムの1つであると考えられる。

Research Progress Status

29年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

29年度が最終年度であるため、記入しない。

Report

(2 results)
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (17 results)

All 2018 2017 2016 Other

All Int'l Joint Research (2 results) Journal Article (8 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 6 results,  Open Access: 5 results,  Acknowledgement Compliant: 2 results) Presentation (5 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results) Book (1 results) Remarks (1 results)

  • [Int'l Joint Research] POSTECH(韓国)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] University of Zurich(スイス)

    • Related Report
      2017 Annual Research Report
  • [Journal Article] A NIGT1-centred transcriptional cascade regulates nitrate signalling and incorporates phosphorus starvation signals in Arabidopsis2018

    • Author(s)
      Maeda Yoshie、Konishi Mineko、Kiba Takatoshi、Sakuraba Yasuhito、Sawaki Naoya、Kurai Tomohiro、Ueda Yoshiaki、Sakakibara Hitoshi、Yanagisawa Shuichi
    • Journal Title

      Nature Communications

      Volume: 9 Issue: 1 Pages: 1-14

    • DOI

      10.1038/s41467-018-03832-6

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Systemic transport of trans-zeatin and its precursor have differing roles in Arabidopsis shoots2017

    • Author(s)
      Osugi Asami、Kojima Mikiko、Takebayashi Yumiko、Ueda Nanae、Kiba Takatoshi、Sakakibara Hitoshi
    • Journal Title

      Nature Plants

      Volume: 3 Issue: 8 Pages: 17112-17112

    • DOI

      10.1038/nplants.2017.112

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Inter-species hormonal control of host root morphology by parasitic plants.2017

    • Author(s)
      Spallek, T., Melnyk, C.W., Wakatake, T., Zhang, J., Sakamoto, Y., Kiba, T., Yoshida, S., Matsunaga, S., Sakakibara, H., *Shirasu, K.
    • Journal Title

      Proc. Natl. Acad. Sci. USA.

      Volume: 印刷中 Issue: 20 Pages: 5283-5288

    • DOI

      10.1073/pnas.1619078114

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Kinetics of the LOV domain of ZEITLUPE determine its circadian function in Arabidopsis2017

    • Author(s)
      Pudasaini Ashutosh、Shim Jae Sung、Song Young Hun、Shi Hua、Kiba Takatoshi、Somers David E、Imaizumi Takato、Zoltowski Brian D
    • Journal Title

      eLife

      Volume: 6 Pages: 1-27

    • DOI

      10.7554/elife.21646

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Improvement of Arabidopsis biomass and cold-, drought-, and salinity-stress tolerance by modified circadian clock-associated PSEUDO-RESPONSE REGULATORs.2016

    • Author(s)
      Nakamichi N, Takao S, Kudo T, Kiba T, Wang Y, Kinoshita T, Sakakibara H
    • Journal Title

      Plant & Cell Physiology

      Volume: in press Issue: 5 Pages: 1085-1097

    • DOI

      10.1093/pcp/pcw057

    • NAID

      120005898470

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Biosynthesis and transport of cytokinins2016

    • Author(s)
      木羽隆敏, 榊原均
    • Journal Title

      Regulation of Plant Growth & Development

      Volume: 51 Issue: 1 Pages: 24-29

    • DOI

      10.18978/jscrp.51.1_24

    • NAID

      130005394578

    • ISSN
      1346-5406, 2189-6305
    • Related Report
      2016 Annual Research Report
  • [Journal Article] C4モデル植物Staria viridisの研究ツールの整備2016

    • Author(s)
      榊原均, 木羽隆敏
    • Journal Title

      植物科学の最前線(BSJ-Review)

      Volume: 7 Pages: 42-46

    • Related Report
      2016 Annual Research Report
  • [Journal Article] Plant nitrogen acquisition under low availability: regulation of uptake and root architecture2016

    • Author(s)
      Takatoshi Kiba and Anne Krapp
    • Journal Title

      Plant Cell Physiology

      Volume: 57 Issue: 4 Pages: 707-714

    • DOI

      10.1093/pcp/pcw052

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Presentation] Structural Variations of Long-Distance Translocated Cytokinins Control the Specificity of the Action in Shoot Growth and Development2017

    • Author(s)
      Takatoshi Kiba
    • Organizer
      XIX International Botanical Congress
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Regulation of nitrogen acquisition under low availability2017

    • Author(s)
      Takatoshi Kiba
    • Organizer
      Bilateral Closure Symposium of GDRI Integrative Plant Biology Network Program
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 窒素栄養不足環境での生存戦略-吸収の効率化と制御のメカニズム-,2017

    • Author(s)
      木羽隆敏
    • Organizer
      第58回日本植物生理学会年会シンポジウム-植物の栄養研究の新局面-
    • Place of Presentation
      鹿児島大学・鹿児島県
    • Related Report
      2016 Annual Research Report
  • [Presentation] Sugar-induced de novo cytokinin biosynthesis enhances Arabidopsis growth in response to elevated carbon availability2016

    • Author(s)
      Takatoshi Kiba, Mikiko Kojima, and Hitoshi Sakakibara
    • Organizer
      CSHasia conference on Latest Advances in Plant Development & Environmental Response
    • Place of Presentation
      淡路夢舞台国際会議場・兵庫県
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Carbon availability controls shoot growth through sugar-induced cytokinin biosynthesis and transport in Arabidopsis2016

    • Author(s)
      Takatoshi Kiba, Mikiko Kojima, and Hitoshi Sakakibara
    • Organizer
      International Plant Growth Substances Association meeting
    • Place of Presentation
      Toronto・CANADA
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Book] Methods in Molecular Biology, Environmental Responses in Plants2016

    • Author(s)
      Takatoshi Kiba and Rossana Henriques
    • Total Pages
      12
    • Publisher
      Springer
    • Related Report
      2016 Annual Research Report
  • [Remarks]

    • URL

      http://pps.riken.jp/

    • Related Report
      2016 Annual Research Report

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Published: 2016-04-26   Modified: 2018-12-17  

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