J Integr Plant Biol. ›› 2012, Vol. 54 ›› Issue (10): 773-789.DOI: 10.1111/j.1744-7909.2012.01164.x

• Research Articles • Previous Articles     Next Articles

Pollen Morphology of the Platycodonoid Group (Campanulaceae s. str.) and Its Systematic Implications

De-Yuan Hong* and Kai-Yu Pan   

  1. State Key Laboratory of Systematic & Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, China
  • Received:2012-07-05 Accepted:2012-08-27 Published:2012-10-01
  • About author:*Corresponding author Tel: +86 01 6283 6096; Fax: +86 01 6259 0843; Email: hongdy@ibcas.ac.cn

Abstract:

In this study, we examined the pollen morphology of the platycodonoid group in Campanulaceae s. str. using a scanning electronic microscope. We used pollen grains of 25 accessions representing 24 species of the Codonopsis complex (including Campanumoea, Cyclocodon, Leptocodon, and all three subgenera of Codonopsis), which is extremely controversial among authors for taxonomic treatment. Pollen morphology of all the other genera in the group observed by previous authors is taken into account in our discussion. A total of nine pollen types with two subtypes in the group were recognized and named for the first time. Molecular and morphological data imply that each pollen type corresponds to a natural group at generic level, and thus the mergence of Leptocodon with Codonopsis and the restoration of Cyclocodon as a separate genus are justifiable, and Codonopsis subg. Pseudocodonopsis, subg. Obconicicapsula, and two species of Codonopsis subg. Codonopsis (C. purpurea and C. chimiliensis) may be better classified as three independent genera separate from the core Codonopsis.

Hong DY, Pan KY (2012) Pollen morphology of the platycodonoid group (campanulaceae s. str.) and its systematic implications. J. Integr. Plant Biol. 54(10), 773–789.

Key words: Campanulaceae s. str., platycodonoid group, Codonopsis complex, pollen morphology, pollen type, taxonomy, systematics

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