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Elucidation of the mechanism that enables re-replication at the onset of endoreplication in plants

Research Project

Project/Area Number 19K05951
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 38060:Applied molecular and cellular biology-related
Research InstitutionKanazawa University

Principal Investigator

Takatsuka Hirotomo  金沢大学, 生命理工学系, 助教 (70633452)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
KeywordsDNA倍加 / 細胞周期 / エピジェネティクス / 細胞成長 / クロマチン / DNA複製
Outline of Research at the Start

細胞分裂を伴わずにDNAの複製を繰り返し、核DNA量を増やす特殊な細胞周期様式であるDNA倍加は、植物に広く見られる現象である。植物は一般に動物に比べ高いDNA倍加能力を示すことが知られている。これは換言すれば、「植物は容易にDNAの再複製を可能にするメカニズムを持つ」ということであるが、そのメカニズムに関しては、殆ど知見が得られていないのが現状である。そこで、本申請で、「特定のエピジェネティック修飾の変動により、クロマチン側が、再複製を受け入れる態勢を整える」という新しい概念を確証する。

Outline of Final Research Achievements

Endoreplication, a specialized mode of cell cycle in which DNA replication is repeated without cell division, induces dramatic cell enlargement, thereby drawing a great deal of attraction. In this study, we revealed an unexpected connection between endoreplication and epigenetics, a field of research on chromatin dynamics without changes in DNA sequence, which has not been focused on before. We found that a specific epigenetic regulator has a function in inhibiting the onset of endoreplication. Indeed, mutants lacking this regulator showed markedly enhanced ploidy level and increased cell size. This regulator might be the key to develop technology for increasing plant biomass production.

Academic Significance and Societal Importance of the Research Achievements

DNA倍加は細胞肥大を誘発するため、植物バイオマス増産の観点から重要な生命現象である。従来の細胞周期因子に着目した研究では、イネやポプラのようなDNA倍加能力の低い植物種でDNA倍加を誘発することはできないことがわかっており、DNA倍加開始に必要な未知のファクターの存在が示唆されていた。本研究の成果から、そのファクターがエピジェネティック制御である可能性が示唆された。今後、「細胞周期」と「エピジェネティック制御」を同時改変することで、イネやポプラで自在にDNA倍加を誘発し、植物バイオマスを人為的に増産する技術の開発が可能になると期待される。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (10 results)

All 2022 2021 2020 2019

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

  • [Journal Article] A hierarchical transcriptional network activates specific CDK inhibitors that regulate G2 to control cell size and number in Arabidopsis2022

    • Author(s)
      Nomoto Yuji、Takatsuka Hirotomo、Yamada Kesuke、Suzuki Toshiya、Suzuki Takamasa、Huang Ying、Latrasse David、An Jing、Gombos Magdolna、Breuer Christian、Ishida Takashi、Maeo Kenichiro、Imamura Miyu、Yamashino Takafumi、Sugimoto Keiko、Magyar Zolt?n、B?gre L?szl?、Raynaud C?cile、Benhamed Moussa、Ito Masaki
    • Journal Title

      Nature Communications

      Volume: 13 Issue: 1 Pages: 1660-1660

    • DOI

      10.1038/s41467-022-29316-2

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Identification of two tobacco genes encoding MYB3R proteins with repressor function and showing cell cycle-regulated transcript accumulation2021

    • Author(s)
      Takatsuka Hirotomo、Nomoto Yuji、Araki Satoshi、Machida Yasunori、Ito Masaki
    • Journal Title

      Plant Biotechnology

      Volume: 38 Issue: 2 Pages: 269-275

    • DOI

      10.5511/plantbiotechnology.21.0224a

    • NAID

      130008056767

    • ISSN
      1342-4580, 1347-6114
    • Year and Date
      2021-06-25
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effectiveness of Create ML in microscopy image classifications: a simple and inexpensive deep learning pipeline for non-data scientists2021

    • Author(s)
      Nagaki Kiyotaka、Furuta Tomoyuki、Yamaji Naoki、Kuniyoshi Daichi、Ishihara Megumi、Kishima Yuji、Murata Minoru、Hoshino Atsushi、Takatsuka Hirotomo
    • Journal Title

      Chromosome Research

      Volume: 29 Issue: 3-4 Pages: 361-371

    • DOI

      10.1007/s10577-021-09676-z

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The DREAM complex represses growth in response to DNA damage in <i>Arabidopsis</i>2021

    • Author(s)
      Lang Lucas、Pettk?-Szandtner Alad?r、Tun?ay Elba?? Hasibe、Takatsuka Hirotomo、Nomoto Yuji、Zaki Ahmad、Dorokhov Stefan、De Jaeger Geert、Eeckhout Dominique、Ito Masaki、Magyar Zolt?n、B?gre L?szl?、Heese Maren、Schnittger Arp
    • Journal Title

      Life Science Alliance

      Volume: 4 Issue: 12 Pages: e202101141-e202101141

    • DOI

      10.26508/lsa.202101141

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Genome Maintenance Mechanisms at the Chromatin Level2021

    • Author(s)
      Takatsuka Hirotomo、Shibata Atsushi、Umeda Masaaki
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 22 Issue: 19 Pages: 10384-10384

    • DOI

      10.3390/ijms221910384

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] MYB3R-mediated active repression of cell cycle and growth under salt stress in Arabidopsis thaliana2021

    • Author(s)
      Okumura Toru、Nomoto Yuji、Kobayashi Kosuke、Suzuki Takamasa、Takatsuka Hirotomo、Ito Masaki
    • Journal Title

      Journal of Plant Research

      Volume: 134 Issue: 2 Pages: 261-277

    • DOI

      10.1007/s10265-020-01250-8

    • NAID

      40022515154

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Cytoskeletal Control of Planar Polarity in Root Hair Development2020

    • Author(s)
      Takatsuka Hirotomo、Ito Masaki
    • Journal Title

      Frontiers in Plant Science

      Volume: 11 Pages: 1-5

    • DOI

      10.3389/fpls.2020.580935

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] CDKD-dependent activation of CKDA;1 controls microtubule dynamics and cytokinesis during meiosis2020

    • Author(s)
      Kostika Sofroni, Hirotomo Takatsuka, Chao Yang, Nico Dissmeyer, Shinichiro Komaki, Yuki Hamamura, Lev B&ouml;ttger, Masaaki Umeda and Arp Schnittger
    • Journal Title

      Journal of Cell Biology

      Volume: in press

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] Chromatin-level regulation of endoreplication onset2021

    • Author(s)
      Hirotomo Takatsuka, Shiori Sugamata-Aki, and Masaaki Umeda.
    • Organizer
      The 31st International Conference on Arabidopsis Research
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] DNA倍加を誘導する新規なエピジェネティック制御系の解析2019

    • Author(s)
      高塚大知、梅田正明
    • Organizer
      植物細胞分子生物学会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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