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Pollen morphology in relation to floral types and pollination syndromes in Pedicularis (Orobanchaceae)

  • H. Wang
  • W. B. Yu
  • J. Q. Chen
  • S. Blackmore
Original Article

Abstract

Floral diversification in the genus Pedicularis (Orobanchaceae) is remarkable among flowering plants. In this genus, floral morphology and pollinator behavior are closely co-adaptive. In the current paper, pollen grains of 23 representative species of Pedicularis mainly from North America, with two species from Japan and two species from China, whose pollination ecology was previously studied, were examined using light microscopy and scanning electron microscopy. Two pollen aperture types and three kinds of exine ornamentation were recognized among these species. In addition, pollen data from previous and the current studies of Pedicularis were integrated and analyzed, together with some pollination characters. There was a significant association between pollen aperture types and corolla types, as well as between pollination syndromes and corolla types. However, there was no association of exine ornamentations with corolla types. The relationships and evolution of this genus were discussed with regards to pollen morphology, corolla types and pollination syndromes.

Keywords

Pedicularis Aperture Floral diversification Pollination syndrome Evolution 

Notes

Acknowledgments

We would like to thank the herbaria at Royal Botanic Garden Edinburgh (E) and Kunming Institute of Botany, Chinese Academy of Sciences (KUN) for allowing us to collect pollen samples. We also thank X. K. Fan for SEM technical assistance. This study was supported by grants from National Basic Research Program of China (973 Program, No. 2007CB411603), the National Natural Science Foundation of China (No.30570115), the Keynote Project of the Knowledge Innovation Program, Chinese Academy of Sciences (No. KSCX2-YW-Z-034), and the Royal Botanic Garden Edinburgh (the Scottish Executive Environment and Rural Affairs Department).

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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • H. Wang
    • 1
    • 2
  • W. B. Yu
    • 2
  • J. Q. Chen
    • 1
  • S. Blackmore
    • 3
  1. 1.School of Life ScienceNanjing UniversityNanjingChina
  2. 2.Key Laboratory of Biodiversity and Biogeography, Kunming Institute of BotanyChinese Academy of SciencesKunmingChina
  3. 3.Royal Botanic Garden EdinburghEdinburghUK

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