生殖创新和植物复杂性的激增
Andrew B Leslie1, Carl Simpson2, Luke Mander3
1Geological Sciences Department, Stanford University, 450 Jane Stanford Way, Building 320, Room 118, Stanford, CA 94305, USA.
Science (New York, N.Y.)
|September 16, 2021
概括
血管植物的繁殖复杂性是在两个主要爆发中演变的,而不是逐渐的. 这些复杂性增加与植物进化中的新功能创新有关.
科学领域:
- 进化生物学
- 古植物学
- 发育生物学
背景情况:
- 形态复杂性是多细胞生物的标志,但它的进化轨迹仍有争议.
- 血管植物的繁殖结构,就像花一样,是复杂的生物设计的例子.
研究的目的:
- 研究血管植物生殖结构中形态复杂性的进化变化的节奏和模式.
- 要确定复杂性是否会随着时间的推移逐渐增加,
主要方法:
- 采用了量化方法,专注于生殖结构中的不同部分类型的数量.
- 从纪到白纪晚期的地质时间的形态变化分析.
主要成果:
- 血管植物的繁殖复杂性并非逐渐增加,而是在两个不同的脉冲中.
- 复杂性的初始脉冲在德时期出现,与早期的血管植物多样化相吻合.
- 第二个更明显的脉冲发生在白纪晚期,由开花植物 (芽植物) 的多样化驱动.
结论:
- 形态复杂性的进化增加是偶发的,经过长时间的停滞.
- 这些复杂的脉冲与新功能的出现和功能多样性的增加密切相关.
- 功能性创新和复杂性转变之间的联系无论它们在血管植物进化历史中的时间如何,都是正确的.
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