Maqola

The evolutionary history of the Central Asian steppe-desert taxon <i>Nitraria</i> (Nitrariaceae) as revealed by integration of fossil pollen morphology and molecular data

Amber WoutersenInstitute for Biodiversity and Ecosystem Dynamics (IBED), University of Amsterdam , 1098 XH Amsterdam , The NetherlandsPhillip E. JardineInstitute of Geology and Palaeontology, University of Münster , 48149 Münster , GermanyDaniele SilvestroDepartment of Biology, University of Fribourg , Chemin du Musée 10, Fribourg, Fribourg , SwitzerlandGiovanni Bogotá‐ÁngelFacultad del Medio Ambiente y Recursos Naturales, Universidad Distrital Francisco José de Caldas , Carrera 7 No. 40B - 53, Bogotá , ColombiaHongxiang ZhangState Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences , Urumqi, 830011 , ChinaNiels MeijerSenckenberg Research Institute , 99423 Weimar , GermanyJohannes M. BouchalResearch Group on Aerobiology and Pollen Information, Department of Oto-Rhino-Laryngology, Medical University Vienna , 1090 Vienna , AustriaNatasha BarboliniDepartment of Biological Sciences, University of Bergen and Bjerknes Centre for Climate Research , 5006 Bergen , NorwayGuillaume Dupont‐NivetGeosciences Rennes UMR-CNRS, Université de Rennes , 35042 Rennes , FranceAndreas KoutsodendrisInstitute of Earth Sciences, Heidelberg University , Heidelberg, 69117 Heidelberg , GermanyAlexandre AntonelliDepartment of Plant Sciences, University of Oxford , Oxford, Oxford OX1 3RB , UKCarina HoornInstitute for Biodiversity and Ecosystem Dynamics (IBED), University of Amsterdam , 1098 XH Amsterdam , The Netherlands

2023en

ABI

Annotatsiya

Abstract The transition from a greenhouse to an icehouse world at the Eocene-Oligocene Transition (EOT) coincided with a large decrease of pollen from the steppe-adapted genus Nitraria. This genus, now common along the Mediterranean coast, Asia and Australia, has a proposed coastal origin and a geographically widespread fossil record. Here we investigated the evolution, taxonomic diversity and morphological disparity of Nitraria throughout the Cenozoic by integrating extant taxa and fossil palynological morphotypes into a unified phylogenetic framework based on both DNA sequences and pollen morphological data. We present the oldest fossil pollen grain of Nitraria, at least 53 Myr old. This fossil was found in Central Asian deposits, providing new evidence for its origin in this area. We found that the EOT is an evolutionary bottleneck for Nitraria, coinciding with retreat of the proto-Paratethys Sea, a major global cooling event and a turnover in Central Asian steppe vegetation. We infer the crown age of modern Nitraria spp. to be significantly younger (Miocene) than previously estimated (Palaeocene). The diversity trajectory of Nitraria inferred from extant-only taxa differs markedly from one that also considers extinct taxa. Our study demonstrates it is therefore critical to apply an integrative approach to fully understand the plant evolutionary history of Nitrariaceae.

Hali tarjima qilinmagan

Identifikatorlar

DOI: 10.1093/botlinnean/boac050

Iqtiboslar va manbalar

2 ta iqtibos0 ta foydalanilgan manba

Koʻrsatkichlar — AkademScholar