Evolution of Asian Interior Arid-Zone Biota: Evidence from the Diversification of Asian Zygophyllum (Zygophyllaceae).
Evolution of Asian Interior Arid-Zone Biota: Evidence from the Diversification of Asian Zygophyllum (Zygophyllaceae).
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亚洲内陆干旱区生物群的演化：来自亚洲霸王（Zygophylllaceae）多样化的证据
DOI：
10.1371/journal.pone.0138697
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发表时间：
2015
期刊：
影响因子：
3.7
通讯作者：
Wang W
中科院分区：
文献类型：
--
作者：
Wu SD;Lin L;Li HL;Yu SX;Zhang LJ;Wang W
亚洲内陆干旱带是北方最大的荒漠地貌系统，具有高度的生物多样性。目前对其生物群的进化历史知之甚少。在这项研究中，我们使用的Zygophyllum，亚洲内陆干旱区的一个重要和特征的组成部分，提供了新的见解，这种生物群的演变。通过大规模的分类单元取样，基于两个质体标记和一个核标记对亚洲霸王属进行了系统发育分析。我们的系统发育分析表明，亚洲Zygophyllum和Sarcozygium形成一个分支和Sarcozygium进一步嵌入灌木亚分支。系统发育，地理和分子测年方法的整合表明，Zygophyllum成功地殖民亚洲内陆从非洲在渐新世早期，亚洲Zygophyllum成为分化在中新世早期，并经历了一个突发的多样化在中新世晚期与亚洲内陆干旱土地的扩张，由于造山和气候变化。结合亚洲内陆干旱带其他重要组成部分的多样性模式，提出了该生物群的多阶段演化模式：始新世晚期-渐新世早期起源，中新世早期扩张，中新世中晚期迅速扩张至整个亚洲内陆干旱带。这项研究还表明，对于霸王和其他适应干旱的生物，干旱生物群落是多样性的进化摇篮。
The Asian interior arid zone is the largest desert landform system in the Northern Hemisphere, and has high biodiversity. Little is currently known about the evolutionary history of its biota. In this study, we used Zygophyllum, an important and characteristic component of the Asian interior arid zone, to provide new insights into the evolution of this biota. By greatly enlarged taxon sampling, we present the phylogenetic analysis of Asian Zygophyllum based on two plastid and one nuclear markers. Our phylogenetic analyses indicate that Asian Zygophyllum and Sarcozygium form a clade and Sarcozygium is further embedded within the shrub subclade. An integration of phylogenetic, biogeographic, and molecular dating methods indicates that Zygophyllum successfully colonized the Asian interior from Africa in the early Oligocene, and Asian Zygophyllum became differentiated in the early Miocene and underwent a burst of diversification in the late Miocene associated with the expansion of Asian interior arid lands due to orogenetic and climatic changes. Combining diversification patterns of other important components of the Asian interior arid zone, we propose a multi-stage evolution model for this biota: the late Eocene–early Oligocene origin, the early Miocene expansion, and the middle-late Miocene rapid expansion to the whole Asian interior arid zone. This study also demonstrates that, for Zygophyllum and perhaps other arid-adapted organisms, arid biomes are evolutionary cradles of diversity.