概括
来自宾夕法尼亚时期的化石种子卵揭示了分支的花粉管,这表明早期的种子植物具有类似于现代体育种类的复杂微生物.
科学领域:
- 古植物学是古植物学.
- 植物繁殖的演变 植物繁殖的演变
背景情况:
- 古生态时期的类植物 (种子) 代表了种子植物的早期血统.
- 了解它们的繁殖生物学是追踪种子植物进化的关键.
研究的目的:
- 为了研究化石种子的繁殖结构.
- 为了推断古老时代的类精子中的微体体的性质.
主要方法:
- 对化石种子卵的显微镜检查.
- 在花粉室内分析花粉粒和相关结构.
主要成果:
- 发现一个带有分支的花粉管的状花粉粒.
- 这颗花粉颗粒是在宾夕法尼亚州中部的一个卵巢的花粉室内发现的.
结论:
- 枝分开的花粉管表明,在一些古老时代的菌体中,复杂的微体菌体发展.
- 这一发现表明繁殖策略与现存的体种类的繁殖策略相似,它们在种子植物历史的早期发展.
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