Origins and evolution of cinnamon and camphor: A phylogenetic and historical biogeographical analysis of the Cinnamomum group (Lauraceae)
Origins and evolution of cinnamon and camphor: A phylogenetic and historical biogeographical analysis of the Cinnamomum group (Lauraceae)
复制标题
肉桂和樟脑的起源和进化：肉桂科（樟科）的系统发育和历史生物地理学分析
DOI：
10.1016/j.ympev.2015.12.007
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发表时间：
2016-03-01
影响因子：
4.1
通讯作者：
Li, Jie
中科院分区：
文献类型：
--
作者：
Huang, Jian-Feng;Li, Lang;Li, Jie
热带和亚热带两栖-太平洋分离是最令人着迷的分布模式之一，但很少受到关注。在这里，我们使用化石丰富的肉桂类群，一个主要是热带和亚热带的亚洲谱系，一些物种分布在新热带地区、澳大拉西亚和非洲，以揭示这种分离模式。利用94个肉桂类群和13个外类群样本的3个核基因座序列进行了系统发育和生物地理学分析。结果表明，尽管在一个单系群中有三个分支，但该属中的肉桂属和以前认识到的亚组都被拒绝作为自然类群。肉桂类群似乎起源于始新世早期(约55 Ma)广泛分布的劳拉西亚热带古植物群。在肉桂类群的洲际分离的形成过程中，热带植物的形成和分解似乎起到了关键作用。始新世晚期的第一个冷期(5048 Ma)导致欧亚大陆和北美之间的植物区系不连续，导致热带和副热带两栖-太平洋的分离。始新世中期(42-38 Ma)的第二个冷却间歇期导致欧亚大陆内的热带碎片化，导致了亚非大陆的断裂。从早始新世到晚中新世，发生了从北美洲到南美洲的多次扩散事件，而从亚洲到澳大利亚的一次迁徙事件似乎发生在早中新世。(C)2015 Elsevier Inc.保留所有权利。
Tropical and subtropical amphi-Pacific disjunction is among the most fascinating distribution patterns, but received little attention. Here we use the fossil-rich Cinnamomum group, a primarily tropical and subtropical Asian lineage with some species distributed in Neotropics, Australasia and Africa to shed light upon this disjunction pattern. Phylogenetic and biogeographic analyses were carried out using sequences of three nuclear loci from 94 Cinnamomum group and 13 outgroup samples. Results show that although there are three clades within a monophyletic Cinnamomum group, Cinnamomum and previously recognized subdivisions within this genus were all rejected as natural groups. The Cinnamomum group appears to have originated in the widespread boreotropical paleoflora of Laurasia during the early Eocene (ca. 55 Ma). The formation and breakup of the boreotropics seems to have then played a key role in the formation of intercontinental disjunctions within the Cinnamomum group. The first cooling interval (5048 Ma) in the late early Eocene resulted in a floristic discontinuity between Eurasia and North America causing the tropical and subtropical amphi-Pacific disjunction. The second cooling interval in the mid Eocene (42-38 Ma) resulted in the fragmentation of the boreotropics within Eurasia, leading to an African-Asian disjunction. Multiple dispersal events from North into South America occurred from the early Eocene to late Miocene and a single migration event from Asia into Australia appears to have occurred in the early Miocene. (C) 2015 Elsevier Inc. All rights reserved.