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Research on the Influence of Soil Physical, Chemical, and Biological Properties on Paddy Soil Bacterial Community Formation

Research Project

Project/Area Number 21K14952
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 41050:Environmental agriculture-related
Research InstitutionNiigata University

Principal Investigator

Suzuki Kazuki  新潟大学, 自然科学系, 准教授 (40801775)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2023: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords土壌微生物 / 水田細菌 / 微生物生態 / エンドファイト / 土壌型 / 土壌有機物 / 水田 / 水田細菌叢 / 水田土壌 / 土壌特性 / 多様性 / 水田土壌微生物 / 土壌 / 微生物群集構造
Outline of Research at the Start

水田においては土壌細菌群集がその地力の維持に重要な役割を果たしていることが明らかになっているが,その群集形成メカニズムは未だ不透明であり,菌叢の制御には至っていない。本研究では,土壌の基礎的性質である物理性・化学性・生物性の3つの側面から水田細菌叢形成における影響を解析し,支配的因子を特定することを目的とする。特に生物性として細菌捕食者である原生生物に注目し,物理性・化学性の改変による直接的影響に加え,それに伴う原生生物叢の変動を介した間接的影響も検討し,細菌叢形成における影響力を解析する。その結果を踏まえ,水稲生育促進を目指した水田土壌細菌叢制御の可能性を探る。

Outline of Final Research Achievements

The mechanisms of bacterial community formation in paddy soil were investigated. The results suggested that paddy soil bacterial communities are generally robust against increases in organic matter, such as compost and rice straw commonly applied to farmland, and not readily degradable humic acids that remain in the soil for long periods. These communities converge to a certain balance characteristic of each soil type, reflecting its chemical and physical properties. Additionally, a two-layer structure pot was developed to evaluate the impact of differences in bacterial communities between soils on rice growth. It was revealed that the differences in bacterial communities between soils could directly influence the formation of rice root endophytic communities.

Academic Significance and Societal Importance of the Research Achievements

本研究結果から,水田土壌細菌群集の形成には有機物以上に何らかの化学的または物理的要因が支配的な影響を与えている可能性が示唆された。今後は細菌群集の生息域としての土壌の構造的な特徴に焦点を当てた研究が必要となると考えられる。また,土壌細菌群集の違いがイネ根の共生細菌群集の形成に直接的な影響を与えることが明らかとなり,土壌改変による細菌群集制御はイネ根共生細菌群集形成を介して水稲生産に貢献する可能性が示された。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (7 results)

All 2023 2022 2021

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (5 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Bacterial Community Composition Under Paddy Conditions Is More Strongly Affected by the Difference in Soil Type than by Field Management2023

    • Author(s)
      Suzuki Kazuki、Katashima Kana、Miki Takaaki、Igarashi Hajime、Xu Qicong、Ohkubo Shinji、Iwaishi Shinji、Harada Naoki
    • Journal Title

      Microbial Ecology

      Volume: 86 Issue: 4 Pages: 2552-2559

    • DOI

      10.1007/s00248-023-02261-3

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Rice endophytic communities are strongly dependent on microbial communities specific to each soil2023

    • Author(s)
      Samuel SO, Suzuki K, Asiloglu R, Harada N
    • Journal Title

      Biology and Fertility of Soils

      Volume: -

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] フミン酸および活性アルミニウムの添加に対する水田土壌細菌叢の応答2023

    • Author(s)
      鈴木一輝, 五十嵐一望, 片嶋夏菜, 原田直樹
    • Organizer
      日本土壌肥料学会2023年度愛媛大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Factors in the formation of paddy soil bacterial communities2022

    • Author(s)
      Igarashi H, Katashima K, Asiloglu R, Harada N, Suzuki K
    • Organizer
      Global Symposium on Soils for Nutrition (FAO)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Microbial source shapes the community of endophytic bacteria in rice roots2022

    • Author(s)
      Samuel SO, Suzuki K, Asiloglu R, Harada N
    • Organizer
      Global Symposium on Soils for Nutrition (FAO)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] イネ根エンドファイト形成における土壌-根接触の重要性と土壌型の影響2022

    • Author(s)
      鈴木一輝,Samuel OS,Asiloglu R,原田直樹
    • Organizer
      日本土壌肥料学会2022年度東京大会
    • Related Report
      2022 Research-status Report
  • [Presentation] 異なる土壌型の菌叢の接種は水田細菌叢に影響を与えるか?2021

    • Author(s)
      1.鈴木一輝・片嶋夏菜・O. S. SAMUEL・五十嵐一望・三木孝明・徐啓聡・榊原健太郎・R. ASILOGLU・原田直樹
    • Organizer
      日本土壌肥料学会2021年度北海道大会
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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