天然产品特化物在伊纪和中纪的针叶树化石中
Angelika Otto1, James D White, Bernd R T Simoneit
1Environmental and Petroleum Geochemistry Group, College of Oceanic and Atmospheric Sciences, Oregon State University, Corvallis, OR 97331, USA. a.otto@kristall.uni-frankfurt.de
概括
化石针叶树含有保存的类,作为天然产品的生物标志物. 这些发现支持了它们的分类,并揭示了极地类对进化研究有价值.
科学领域:
- 古植物学是古植物学.
- 有机地化学 有机地化学
- 分子进化分子进化
背景情况:
- 像碳化合物这样的生物标志物在地质样本中很常见.
- 极地化合物以前作为化石生物标志物的研究较少.
- 类是具有多样性结构的植物性天然产品.
研究的目的:
- 调查类在化石针叶树中的存在和重要性.
- 评估类作为植物分类和进化研究的生物标记物的有用性.
- 为了比较化石针叶树的形形状与现存的亲属.
主要方法:
- 使用有机地质化学技术分析化石针叶树 (Taxodium balticum,Glyptostrobus oregonensis) 中的类化合物.
- 化石类样本与现存的Taxodium distichum的比较.
- 基于保存的分子证据进行系统的分配.
主要成果:
- 包括极地类型在内的特征性 terpenoids 在Eocene 和 Miocene 化石针叶树中被确定.
- 化石针叶树中的形形状非常类似于现存的Taxodium distichum.
- 保存的类植物支持化石针叶树在树家族 (Cupressaceae sensu lato) 的分类.
结论:
- 化石针叶树含有未经改变的天然产物类,作为可靠的生物标志物.
- 化石中的极地类物质对于古化学系统学和遗传学重建至关重要.
- 这项研究扩大了对化石有机物中的生物标志物潜力的理解.
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