• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

The Importance of Programmed Cell Death in Rice Productivity: Ecological Functions and Regulatory Mechanisms

Research Project

Project/Area Number 20H00418
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 39:Agricultural and environmental biology and related fields
Research InstitutionThe University of Tokyo

Principal Investigator

Fujimoto Masaru  東京大学, 大学院農学生命科学研究科(農学部), 准教授 (60554475)

Co-Investigator(Kenkyū-buntansha) 根本 圭介  東京大学, 大学院農学生命科学研究科(農学部), 教授 (40211461)
橋本 将典  東京大学, 大学院農学生命科学研究科(農学部), 助教 (20615273)
Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥44,590,000 (Direct Cost: ¥34,300,000、Indirect Cost: ¥10,290,000)
Fiscal Year 2023: ¥10,010,000 (Direct Cost: ¥7,700,000、Indirect Cost: ¥2,310,000)
Fiscal Year 2022: ¥10,530,000 (Direct Cost: ¥8,100,000、Indirect Cost: ¥2,430,000)
Fiscal Year 2021: ¥10,530,000 (Direct Cost: ¥8,100,000、Indirect Cost: ¥2,430,000)
Fiscal Year 2020: ¥13,520,000 (Direct Cost: ¥10,400,000、Indirect Cost: ¥3,120,000)
Keywordsイネ / 柔組織 / プログラム細胞死 / 収量性 / 耐湿性 / 根圏微生物叢
Outline of Research at the Start

本研究では,イネの柔組織においてプログラム細胞死を誘導する遺伝子の機能解析や各種の農業形質に影響を及ぼす遺伝子座との照合を通じ,イネの収量形成や耐湿性に関わるプログラム細胞死の分子機構や生理生態的な役割を総合的に解明する。このことによって,イネの生理生態的過程の制御に関する理解が大きく深まることが期待できる。

Outline of Final Research Achievements

This study investigated the molecular mechanisms and physiological and ecological roles of programmed cell death (PCD) in rice, focusing on the rice homolog of the sorghum gene, which encodes a transcription factor known to induce PCD in stem parenchyma. We found that in rice, this gene is expressed not only in stems but also in roots, where it induces PCD in internal tissues and plays a crucial role in forming aerenchyma, a specialized air space that facilitates oxygen diffusion from shoots to root tips. Furthermore, its root expression is regulated by multiple phytohormones, and the resulting aerenchyma formation is essential for rice growth in waterlogged paddy soils.

Academic Significance and Societal Importance of the Research Achievements

通気組織の形成は、作物の耐湿性に寄与する重要形質のひとつである。嫌気的な水田土壌で生育するイネでは、根の通気組織が他のイネ科畑作物と比較して高度に発達しており、耐湿性の基盤として機能している。本研究の成果により、イネの根の通気組織形成を制御する中心的遺伝子が同定されたことで、その分子メカニズムだけでなく、イネがなぜ水田で生育できるのか、という問いの解明にも新たな視点からアプローチできるようになった。また、得られた知見は、コムギやオオムギ、トウモロコシといったイネ科畑作物の耐湿性を向上させる分子育種技術開発への新たな道を切り拓くものであり、気候変動に対応した農業生産安定化への貢献が期待できる。

Report

(6 results)
  • 2024 Final Research Report ( PDF )
  • 2023 Annual Research Report
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Comments on the Screening Results   Annual Research Report
  • Research Products

    (8 results)

All 2025 2024 2021 2020

All Journal Article (7 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 7 results,  Open Access: 6 results) Presentation (1 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] A Comparison of Rice Root Microbial Dynamics in Organic and Conventional Paddy Fields2025

    • Author(s)
      Fangming Zhu, Takehiro Kamiya, Toru Fujiwara, Masayoshi Hashimoto, Siyu Gong, Jindong Wu, Hiromi Nakanishi, Masaru Fujimoto
    • Journal Title

      Microorganisms

      Volume: 13 Issue: 1 Pages: 41-41

    • DOI

      10.3390/microorganisms13010041

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Spatial kernel models capturing field heterogeneity for accurate estimation of genetic potential2021

    • Author(s)
      Ishimori M, Takanashi H, Fujimoto M, Kajiya-Kanegae H, Yoneda J, Tokunaga T, Tsutsumi N, Iwata H.
    • Journal Title

      Breeding Science

      Volume: 71 Issue: 4 Pages: 444-455

    • DOI

      10.1270/jsbbs.20060

    • NAID

      130008095970

    • ISSN
      1344-7610, 1347-3735
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Impacts of dominance effects on genomic prediction of sorghum hybrid performance2020

    • Author(s)
      Ishimori M, Hattori T, Yamazaki K, Takanashi H, Fujimoto M, Kajiya-Kanegae H, Yoneda J, Tokunaga T, Fujiwara T, Tsutsumi N, Iwata H.
    • Journal Title

      Breeding Science

      Volume: 70 Issue: 5 Pages: 605-616

    • DOI

      10.1270/jsbbs.20042

    • NAID

      130007962583

    • ISSN
      1344-7610, 1347-3735
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Dissecting the Genetic Architecture of Biofuel-related Traits in a Sorghum Breeding Population2020

    • Author(s)
      Ishimori M, Takanashi H, Hamazaki K, Atagi Y, Kajiya-Kanegae H, Fujimoto M, Yoneda J, Tokunaga T, Tsutsumi N, Iwata H
    • Journal Title

      G3

      Volume: 10 Issue: 12 Pages: 4565-4577

    • DOI

      10.1534/g3.120.401582

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Longin R-SNARE is retrieved from the plasma membrane by ANTH domain-containing proteins in Arabidopsis2020

    • Author(s)
      Fujimoto Masaru、Ebine Kazuo、Nishimura Kohji、Tsutsumi Nobuhiro、Ueda Takashi
    • Journal Title

      Proceedings of the National Academy of Sciences

      Volume: 117 Issue: 40 Pages: 25150-25158

    • DOI

      10.1073/pnas.2011152117

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effect of salt tolerance on biomass production in a large population of sorghum accessions2020

    • Author(s)
      Yamazaki Kiyoshi、Ishimori Motoyuki、Kajiya-Kanegae Hiromi、Takanashi Hideki、Fujimoto Masaru、Yoneda Jun-ichi、Yano Kentaro、Koshiba Taichi、Tanaka Ryokei、Iwata Hiroyoshi、Tokunaga Tsuyoshi、Tsutsumi Nobuhiro、Fujiwara Toru
    • Journal Title

      Breeding Science

      Volume: 70 Issue: 2 Pages: 167-175

    • DOI

      10.1270/jsbbs.19009

    • NAID

      130007833812

    • ISSN
      1344-7610, 1347-3735
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] RAD-seq-Based High-Density Linkage Map Construction and QTL Mapping of Biomass-Related Traits in Sorghum using the Japanese Landrace Takakibi NOG.2020

    • Author(s)
      Kajiya-Kanegae H, Takanashi H, Fujimoto M, Ishimori M, Ohnishi N, Wacera W F, Omollo EA, Kobayashi M, Yano K, Nakano M, Kozuka T, Kusaba M, Iwata H, Tsutsumi N, Sakamoto W
    • Journal Title

      Plant Cell Physiol.

      Volume: 61 Issue: 7 Pages: 1262-1272

    • DOI

      10.1093/pcp/pcaa056

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Temporal Shifts of Root Microbiota Composition in Rice in Organic and Conventional Paddies2024

    • Author(s)
      Fangming Zhu, Masaru Fujimoto
    • Organizer
      American Society of Plant Biology 2024 Conference
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research

URL: 

Published: 2020-04-28   Modified: 2026-01-16  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi