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Ancient Rhamnaceae flowers impute an origin for (fire-prone) flowering plants exceeding 250-million-years ago
iScience ( IF 4.6 ) Pub Date : 2022-06-18 , DOI: 10.1016/j.isci.2022.104642 Tianhua He 1 , Byron B Lamont 2
中文翻译：
古老的鼠李科花卉为超过 2.5 亿年前的（易着火的）开花植物提供了起源
更新日期：2022-06-19
iScience ( IF 4.6 ) Pub Date : 2022-06-18 , DOI: 10.1016/j.isci.2022.104642 Tianhua He 1 , Byron B Lamont 2
Affiliation
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Setting the molecular clock to newly described 100-million-year-old flowering shoots of Phylica in Burmese amber enabled us to recalibrate the phylogenetic history of Rhamnaceae. We traced its origin to ∼260 million years ago (Ma) that can explain its migration within and beyond Gondwana since that time, and implies an origin for flowering plants that stretches well beyond 290 Ma. Ancestral trait assignments also revealed that hard-seededness, fire-proneness and, to a lesser extent, heat-released seed dormancy, have a similarly long history in this clade.
中文翻译：
古老的鼠李科花卉为超过 2.5 亿年前的（易着火的）开花植物提供了起源
将分子时钟设置为新描述的缅甸琥珀中 1 亿年前的Phylica开花芽，使我们能够重新校准鼠李科的系统发育历史。我们将它的起源追溯到 2.6 亿年前（Ma），这可以解释它从那时起在冈瓦纳内外迁移，并暗示开花植物的起源远远超过 290 Ma。祖先特征分配还表明，在这个进化枝中，硬种子、易火以及在较小程度上的放热种子休眠具有同样悠久的历史。
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