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在叶子进化过程中,对保存的发育机制的独立招募
C Jill Harrison1, Susie B Corley, Elizabeth C Moylan
1Department of Plant Sciences, University of Oxford, South Parks Road, Oxford OX1 3RB, UK.
Nature
|March 26, 2005
概括
植物进化揭示了微型和巨型树叶的共同发育机制. 这一发现挑战了关于血管植物独立叶子形成途径的先前假设.
科学领域:
- 进化生物学 进化生物学
- 植物开发 植物开发
- 遗传学 是一个遗传学.
背景情况:
- 血管植物起源于西鲁纪时期,最初缺乏叶子.
- 类似叶子的结构独立地进化了两次,导致微 (白) 和大 ().
- 目前关于叶子发育的知识主要集中在巨型植物形成上.
研究的目的:
- 调查微和巨的形成是否利用不同的或共同的发育机制.
- 探索叶子发育途径的进化起源.
主要方法:
- 来自微型白菌的基因表达数据的分析.
- 植物系的植物遗传学分析.
- 跨物种的基因补充实验.
主要成果:
- 有证据表明,共同的发育机制是微和巨形成的基础.
- 这种保存的途径可能起源于参与分枝的原始植物状结构.
- 叶子发育途径在不同的植物系中被独立地招募.
结论:
- 微生物和巨生物进化共享一个共同的遗传和发育基础.
- 这种保存的机制突显了在为新结构招募现有途径时的进化灵活性.
- 这些发现为植物形态和发育的早期进化提供了洞察力.
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