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Constrains on timings of cyanobacterial and eukaryotic evolutions based on innovative biomarker analyses

Research Project

Project/Area Number 19H02013
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 17050:Biogeosciences-related
Research InstitutionNagoya University

Principal Investigator

Sugitani Kenichiro  名古屋大学, 環境学研究科, 教授 (20222052)

Co-Investigator(Kenkyū-buntansha) 石田 章純  東北大学, 理学研究科, 助教 (10633638)
掛川 武  東北大学, 理学研究科, 教授 (60250669)
三村 耕一  名古屋大学, 環境学研究科, 准教授 (80262848)
大友 陽子  北海道大学, 工学研究院, 助教 (80612902)
Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2020: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2019: ¥9,490,000 (Direct Cost: ¥7,300,000、Indirect Cost: ¥2,190,000)
Keywords太古代 / 微化石 / 真核生物 / シアノバクテリア / ピルバラクラトン / 西オーストラリア / ピルバラ地塊 / 大型微化石 / 真核生物性 / 衝突起源小球体 / 真核藻類 / バイオマーカー / 形態分析 / 同位体 / 小惑星衝突 / 太古代微化石 / バイオマーカー分析 / 微細構造分析 / 同位体分析 / 赤外分光分析 / 酸分解抽出 / レンズ状微化石 / 大型球状微化石 / 隕石衝突の痕跡
Outline of Research at the Start

西オーストラリア・ピルバラ地塊のファレル珪岩層(約30億年前)とスティルリー・プール層(約34億年前)の大型微化石群について、シアノバクテリアや真核生物の出現が30億年前やそれ以前に溯るのではないかという仮説を検証するために、1)分離濃集した微化石を対象としたバイオマーカー抽出・分析を軸とし、その代謝特異性の曖昧さを補完するため、2)”In situ”炭素窒素・同位体比測定による代謝機能の制約、3)形態や産状の解析にもとづく生活環の復元と分類体系の構築、4)超微細構造等分析による生理学的制約を行う。

Outline of Final Research Achievements

Unfortunately, we were not able to detect the biomarkers that we initially intended in this study. However, thorough morphological analysis of microfossils in specimens in petrographic thin sections and maceration products, we found that large (~100 micron) lenticular microfossils form complex colonies that can only be attributed to intercellular physical communication. This suggests that they had a highly organized cytoskeleton. Similar cytoskeletons have been shown to hold for large sack-like fossils that can reach over 200 microns, allowing us to take a step closer to understanding the eukaryotic nature of these large microfossils. In addition, we were able to build a framework for the classification system of a series of Archean microfossil groups discovered by the applicant.

Academic Significance and Societal Importance of the Research Achievements

初期地球、特に太古代における生命の姿とその進化は、多くの謎に包まれており、学術論文は多数出版されてはいるものの、特に微化石に関するものはその信頼性において疑念を拭えないもの少なからずある。本研究課題を遂行するなかで、申請者が長年研究してきた西オーストラリア・ピルバラ地塊の太古代の大型微化石群についてその生物起源性と多様性、そして真核生物の黎明に関する信頼性の高いデータを提示できた。この成果は人々の生命観にあらたな視点を与えるものであり、さらに火星における有人探査と試料採取、そしてそれにもとづく地球外生命の探索と”認定”において重要な役割を果たすと期待される。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (16 results)

All 2023 2022 2021 2020 Other

All Int'l Joint Research (8 results) Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results) Presentation (3 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results) Book (1 results)

  • [Int'l Joint Research] University of Lille, CNRS(フランス)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] University of Liege(ベルギー)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Sorbonne University/University of Lille(フランス)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] University of Freiburg(ドイツ)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] The University of Manchester(英国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] University of Liege(ベルギー)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Universite de Lorraine/Sorbonne Universites(フランス)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] The University of Manchester(英国)

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Origin of silicate spherules and geochemistry of Re and platinum-group elements within microfossil-bearing Archean chert from the 3.4 Ga Strelley Pool Formation, Western Australia2023

    • Author(s)
      Sugitani Kenichiro、Mimura Koichi、Senda Ryoko、Kouketsu Yui、Wallis Simon、Takagi Natsuko、Iizuka Tsuyoshi、Lowe R. Donald
    • Journal Title

      Astrobiology

      Volume: 23 Pages: 1-21

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Distinguishing cellular from abiotic spheroidal microstructures in the ca. 3.4 Ga Strelley Pool Formation2022

    • Author(s)
      Coutant Maxime、Lepot Kevin、Fadel Alexandre、Addad Ahmed、Richard Elodie、Troadec David、Ventalon Sandra、Sugitani Kenichiro、Javaux Emmanuelle J.
    • Journal Title

      Geobiology

      Volume: 20 Issue: 5 Pages: 599-622

    • DOI

      10.1111/gbi.12506

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Microfossils with tail-like structures in the 3.4 Gyr old Strelley Pool Formation2021

    • Author(s)
      Delarue Frederic、Bernard Sylvain、Sugitani Kenichiro、Robert Francois、Tart?se Romain、Albers Sonja-Verena、Duhamel R?mi、Pont Sylvain、Derenne Sylvie
    • Journal Title

      Precambrian Research

      Volume: 358 Pages: 106187-106187

    • DOI

      10.1016/j.precamres.2021.106187

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Out of rock: A new look at the morphological and geochemical preservation of microfossils from the 3.46 Gyr-old Strelley Pool Formation.2020

    • Author(s)
      Delarue, F., Robert, F., Derenne, S.., Tarts, R., Jauvion, C., Bernard, S., Pont, S., Gonzalez-Cana, Duhamel, R., Sugitani, K.
    • Journal Title

      Precambrian Research

      Volume: 336

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Presentation] SILICATE SPHERULES OF POSSIBLE IMPACT ORIGIN FROM THE PALEOARCHEAN STRELLEY POOL FORMATION, WESTERN AUSTRALIA2023

    • Author(s)
      Sugitani Kenichiro
    • Organizer
      1st WHEEL Seminar (5th IGS “Precambrian World 2023” )
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Life on the early Archean Earth - new insights from lenticular microfossils2021

    • Author(s)
      Kenichiro Sugitani
    • Organizer
      日本地質学会第128年学術大会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Palynology of Archean microfossils - a new window into the ancient life2021

    • Author(s)
      Kenichiro Sugitani, Kathleen Grey
    • Organizer
      53rd Annual Meeting of the AASP-The Palynological Society
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Book] Early Life on Earth: Evolution, Diversification, and Interactions2022

    • Author(s)
      Kenichiro Sugitani
    • Total Pages
      332
    • Publisher
      CRC press
    • ISBN
      0367425645
    • Related Report
      2021 Annual Research Report

URL: 

Published: 2019-04-18   Modified: 2024-01-30  

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