量化植物生殖结构的复杂性揭示了形态和功能整合的历史
Andrew B Leslie1, Luke Mander2
1Department of Geological Sciences, Stanford University, 450 Jane Stanford Way, Building 320, Room 118, Stanford, CA 94305, USA.
Proceedings. Biological sciences
|November 1, 2023
概括
植物的繁殖结构随着时间的推移而演变为越来越复杂和集成. 化石记录的网络分析揭示了朝着更紧的转变,跨血统功能互联的生殖部分.
科学领域:
- 进化生物学 进化生物学
- 古植物学是古植物学.
- 植物生殖形态 植物生殖形态
背景情况:
- 血管植物的生殖结构在进化过程中呈现出越来越多的复杂性和分化.
- 在生殖结构中量化进化模式是具有挑战性的,因为它们的不同性质和难以同质化的困难.
- 了解生殖部分的功能整合是解读重大进化过渡的关键.
研究的目的:
- 开发和应用一种新的基于网络的方法来分析植物生殖结构内的相互作用.
- 量化生殖结构复杂性和整合在整个植物化石记录的变化.
- 研究生殖创新与功能一体化的演变之间的关系.
主要方法:
- 开发了一个网络分析框架,将生殖结构组件视为节点,相互作用视为边缘.
- 将这种网络方法应用于各种植物化石的繁殖结构.
- 分析了生殖结构内的相互作用数量和度的时间趋势.
主要成果:
- 植物生殖结构显示,随着时间的推移,相互作用和功能整合的普遍增加.
- 相互作用集中在周围的器官中,导致更紧和更完整的结构.
- 产生种子的结构比产生子或花粉的结构表现出更强的整合趋势.
- 种子和血管精子等重大创新与增加的整合相关,但在某些群体 (例如,中生时期的精子) 中存在不同的时间滞后.
结论:
- 新型网络方法有效量化了生殖结构复杂性和整合性的进化变化.
- 增加功能整合是血管植物繁殖中广泛的进化趋势,在种子植物中尤其明显.
- 与生殖创新相比,增加整合的时间有所不同,突出了不同的进化途径.
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