Plant Systematics and Evolution

, Volume 299, Issue 5, pp 935–948 | Cite as

Pollen morphology and its taxonomic significance in the tribe Gochnatieae (Compositae, Gochnatioideae)

  • María C. Tellería
  • Gisela Sancho
  • Vicky A. Funk
  • Iralys Ventosa
  • Nadia Roque
Original Article

Abstract

In the context of recent molecular phylogenies of the basal grades of Compositae, we investigated the utility of pollen morphology within the tribe Gochnatieae. The pollen of 64 species of Anastraphia,Cnicothamnus, Cyclolepis, Gochnatia, Pentaphorus, and Richterago was studied using light microscopy and scanning electron microscopy. In addition, three extra-Gochnatieae genera (Ianthopappus, Leucomeris, and Nouelia) were examined as they were traditionally morphologically related to members of the tribe Gochnatieae. Three of the species of Gochnatieae were examined using transmission electron microscopy. Two pollen types, and two new subtypes, have been recognized on the basis of the pollen shape, size, and exine sculpture. The pollen features of Gochnatia sect. Moquiniastrum and G. cordata are similar and distinctive within the genus and support the recently re-circumscribed section Hedraiophyllum. Within the species with echinate pollen surface, the distinctive spine length of Anastraphia supports its recent resurrection as a genus. The identity of Pentaphorus could not be supported by pollen features as was for other morphological characteristics. The pollen features shared across Cyclolepis,Ianthopappus, Leucomeris, Nouelia and Gochnatia sect. Moquiniastrum, as well as those shared by Richterago and Anastraphia could be a result of parallel evolution.

Keywords

Gochnatieae Gochnatioideae Compositae Pollen LM SEM TEM 

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Copyright information

© Springer-Verlag Wien 2013

Authors and Affiliations

  • María C. Tellería
    • 1
  • Gisela Sancho
    • 2
  • Vicky A. Funk
    • 3
  • Iralys Ventosa
    • 4
  • Nadia Roque
    • 5
  1. 1.Laboratorio de Sistemática y Biología EvolutivaMuseo de La PlataLa PlataArgentina
  2. 2.División Plantas VascularesMuseo de La PlataLa PlataArgentina
  3. 3.US National Herbarium, Department of BotanySmithsonian InstitutionWashington DCUSA
  4. 4.Vicedirección de Plantas Vasculares y Herbario NacionalInstituto de Ecología y Sistemática, CITMACiudad de la HabanaCuba
  5. 5.Herbário Alexandre Leal Costa, Instituto de Biologia, Universidade Federal da BahiaSalvadorBrazil

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