白亜紀木片化石の抵抗性高分子を構成する結合態脂肪酸および脂肪族アルコールの組成分布 : 分子古生物学的指標の検討

• 中村 英人

  北海道大学大学院理学院自然史科学専攻

• 沢田 健

  北海道大学大学院理学院自然史科学専攻

書誌事項

タイトル別名

• Distributions of fatty acids and alcohols bound in resistant macromolecules of the Cretaceous woody-fragment fossils : search for molecular paleontological indicators
• ハクアキ モクヘン カセキ ノ テイコウセイ コウブンシ オ コウセイスル ケツゴウタイ シボウサン オヨビ シボウゾク アルコール ノ ソセイ ブンプ ブンシ コセイブツガクテキ シヒョウ ノ ケントウ

抄録

The chemical compositions of woody fossil fragments collected by picking manually and density centrifugation from sandstones of the Lower Cretaceous Yezo Group in Oyubari, central Hokkaido, Japan were analyzed by KOH/methanol hydrolysis (saponification) after solvent extraction. Organic compounds bound in macromolecules of the woody fragments with ester bonds, obtained by saponification, were mainly composed of short-chain (C₁₄ to C₁₈) fatty acids and series of n-alkanols ranging from C₁₂ to C₂₈ homologues. These ester bound constituents are attributed to moieties of polyester parts of selectively preserved resistant macromolecule like cutin or suberin. Even carbon-number predominance was observed in both compounds, which indicated that biological components were well preserved. The bound fatty acids showed similar distribution patterns among all samples, indicating that these moieties might have been altered by strong diagenetic processes. On the other hand, the distribution patterns of n-alkanols significantly varied. In particular, those of long-chain (>C₂₀) n-alkanols varied possibly depending on plant taxonomy. Thus, we suggest that these parameters are strongly useful as molecular paleobiological indicators for chemotaxonomic analyses. Also, the distributions of short-chain n-alkanols and the ratios of short to long-chain homologues are presumably useful indicators for diagenesis, taphonomy and environment.

収録刊行物

• Researches in Organic Geochemistry

  Researches in Organic Geochemistry 22 (0), 31-42, 2007

  日本有機地球化学会

詳細情報

• CRID: 1390282680389426560
• NII論文ID: 110007504591
• NII書誌ID: AA11889471
• DOI: 10.20612/rog.22.0_31
• ISSN: 21897891
• ISSN: 13449915
• NDL書誌ID: 9342070
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9342070
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可