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脉冲进化塑造了现存的血管精子花粉差异

Yang Luo¹, Hong-Tao Li¹, Lu Lu¹

¹Germplasm Bank of Wild Species and Yunnan Key Laboratory of Wild Crop Relative Omics, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan, China.

Nature communications

|January 7, 2026

概括

胞花粉的多样性通过两个主要的脉冲扩大,与环境变化和创新有关. 花粉差异揭示了对血管精子辐射和植物进化的关键见解.

科学领域:

古植物学是古植物学.
进化生物学进化生物学
植物科学植物科学

背景情况:

由于它们的保存,花粉粒对于了解过去的植物多样性至关重要.
血管精子花粉多样化模式的量化仍然很差.
杂花菌壁提供了显著的结构多样性和保存.

研究的目的:

量化血管精子花粉的进化动态.
分析形态空间占用,差异和形态进化速率.
了解与环境变化和创新相关的血管精子花粉多样化.

主要方法:

整合了基因级的花粉特征数据集与时间校准的基因组.
量化形态空间占用,差异和形态进化的速度.
推断出基于现存形态学的演化模式.

主要成果:

血管精子花粉差异通过白纪中期和古世时期的两次主要脉冲增长而扩大.
这些增长与显著的环境变化和关键的花粉创新相关.
早期的血管精子进化显示出较低的差异,随后是快速的白纪中期激增.

结论:

花粉差异是跟踪血管精子辐射的强大工具.
多元化涉及创新和生态机会之间的协同作用.
这些发现为解释木种化石记录提供了关键的背景.

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