Classification of Precambrian microfossils using micro-FTIR spectroscopy

2011 Fiscal Year Final Research Report

• Project/Area Number: 22740351
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Geochemistry/Astrochemistry
• Research Institution: The University of Tokyo
• Principal Investigator: IGISU Motoko 東京大学, 大学院・総合文化研究科, 特任研究員 (00518285)
• Project Period (FY): 2010 – 2011
• Keywords: 先カンブリア時代 / 微化石 / 顕微赤外分光法

Research Abstract

We conducted micro-Fourier Transform Infrared spectroscopic measurements on extant and fossil microbes. IR signatures of aliphatic hydrocarbons(CH_2 and CH_3) in extant bacteria and archaea show domain-specific signatures, thus could be useful for fast and effective domain-level diagnosis of bacteria and archarea. Those in phosphatic embryo-like fossils suggest that these microfossils have more diverse origin than previously recognized on the basis of their morphology.

Research Products

• [Journal Article] Isozaki(2012) Domain-level identification and quantification of relative prokaryotic cell abundance in microbial communities by Micro-FTIR spectroscopy (2012)
  • Author(s): M. Igisu, K. Takai, Y. Ueno, M. Nishizawa, T. Nunoura, M. Hirai, M. Kaneko, H. Naraoka, M. Shimojima, K. Hori, S. Nakashima, H. Ohta, S. Maruyama, Y.
  • Journal Title: Environmental Microbiology Report Volume: 4 Pages: 42-49
  • Peer Reviewed
• [Journal Article] Maruyama(2011) Micro-FTIR spectroscopic imaging of 1900 Ma stromatolitic chert. In Stromatolites : Interaction of Microbes with Sediments(eds. V. C. Tewari and J. Seckbach), Cellular Origin, Life in Extreme Habitats (2011)
  • Author(s): M. Igisu, Y. Ueno, S. Nakashima, S. M. Awramik, S.
  • Journal Title: and Astrobiology Pages: 445-461
  • Peer Reviewed
• [Presentation] 南中国Weng' an地域から産出した微化石の顕微赤外分光分 (2011)
  • Author(s): 伊規須素子、小宮剛、中嶋悟、上野雄一郎、丸山茂徳
  • Organizer: 日本地球惑星科学連合2011年大会
  • Place of Presentation: 幕張メッセ
  • Year and Date: 2011-05-24
• [Presentation] Fast and simple domain-level diagnosis of prokaryotic cell in microbial community using micro-infrared spectroscopy (2010)
  • Author(s): M. Igisu, K. Takai, Y. Ueno, M. Nishizawa, T. Nunoura, M. Hirai, M. Kaneko, H. Naraoka, and S. Nakashima
  • Organizer: 2010 GSA Annual Meeting
  • Place of Presentation: Denver
  • Year and Date: 2010-11-01
• [Presentation] 顕微赤外分光法による化石・現生原核生物ドメイン識別の試み (2010)
  • Author(s): 伊規須素子、高井研、上野雄一郎、下嶋美恵、中嶋悟、太田啓之、丸山茂徳、磯崎行雄
  • Organizer: 日本地質学会第117年学術大会
  • Place of Presentation: 富山大学
  • Year and Date: 2010-09-20
• [Presentation] 顕微赤外分光法による原核生物ドメイン識別の試み (2010)
  • Author(s): 伊規須素子、高井研、上野雄一郎
  • Organizer: 第13回日本水環境学会シンポジウム
  • Place of Presentation: 京都大学
  • Year and Date: 2010-09-08