J Integr Plant Biol. ›› 2014, Vol. 56 ›› Issue (10): 995-1008.DOI: 10.1111/jipb.12203

• Molecular Ecology and Evolution • Previous Articles     Next Articles

Evolution of the platycodonoid group with particular references to biogeography and character evolution

Qiang Wang1, Xiao-Quan Wang1, Hang Sun2, Yan Yu3, Xing-Jin He3 and De-Yuan Hong1*   

  1. 1State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, the Chinese Academy of Sciences, Xiangshan, Beijing, China
    2Key Laboratory of Biodiversity and Biogeography, Kunming Institute of Botany, the Chinese Academy of Sciences, Kunming, Yunnan, China
    3College of Life Sciences, Sichuan University, Chengdu, China
  • Received:2013-12-03 Accepted:2014-03-30 Published:2014-04-05
  • About author:*Correspondence: E-mail: hongdy@ibcas.ac.cn

Abstract:

The Qinghai-Tibet Plateau (QTP) is an important center of origin and diversification for many northern temperate plants. The hypothesis “out-of-QTP” suggests that the majority of northern temperate plants have originated and dispersed from the QTP and adjacent regions. An interesting question is whether the biogeographic history of the platycodonoids (Campanulaceae), a group mainly distributed in the QTP and adjacent regions, coincides with the hypothesis “out-of-QTP”? Furthermore, how have the diagnostic characters of the platycodonoids evolved? In the present study, all 10 genera of the platycodonoids were sampled for molecular phylogeny and dating analyses, and ancestral states of distribution and characters were reconstructed. The results do not support the platycodonoids as an “out-of-QTP” group, but instead they might have descended from Tethyan ancestors. The dispersal and diversification of the platycodonoids in Asia might have been driven by the uplift of the QTP. The present study highlights the importance of the Tethyan Tertiary flora for the origin of the Sino-Himalayan flora and the influence of the uplift of QTP on diversification of northern temperate plants. In addition, character state reconstruction reveals that the inferior ovary, capsule, long-colpate pollen, and chromosome number 2n = 14 are probably ancestral states.

 

Wang Q, Wang XQ, Sun H, Yu Y, He XJ, Hong DY (2014) Evolution of the platycodonoid group with particular references to biogeography and character evolution. J Integr Plant Biol 56: 995–1008. doi: 10.1111/jipb.12203

Key words: Biogeography, Campanulaceae, character evolution, platycodonoids, Qinghai-Tibet Plateau

Editorial Office, Journal of Integrative Plant Biology, Institute of Botany, CAS
No. 20 Nanxincun, Xiangshan, Beijing 100093, China
Tel: +86 10 6283 6133 Fax: +86 10 8259 2636 E-mail: jipb@ibcas.ac.cn
Copyright © 2021 by the Institute of Botany, the Chinese Academy of Sciences
Online ISSN: 1744-7909 Print ISSN: 1672-9072 CN: 11-5067/Q
备案号:京ICP备16067583号-22