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

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 microscop...

Full description

Saved in:
Bibliographic Details
Published in:Plant systematics and evolution 2013-05, Vol.299 (5), p.935-948
Main Authors: Tellería, María C, Sancho, Gisela, Funk, Vicky A, Ventosa, Iralys, Roque, Nadia
Format: Article
Language:English
Subjects:
Asteraceae
Biological taxonomies
Biomedical and Life Sciences
Electron microscopes
Endemic species
Genera
Gochnatia
Life Sciences
Light microscopy
Microscopy
Morphology
Original Article
Palynology
parallel evolution
Phylogenetics
Physical characteristics
Plant Anatomy/Development
Plant Ecology
Plant morphology
Plant Sciences
Plant Systematics/Taxonomy/Biogeography
Plants
Pollen
Scanning electron microscopy
Shape recognition
Species
Spine
Taxa
Taxonomic significance
Transcriptional regulatory elements
Transmission electron microscopy
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:0378-2697
1615-6110
2199-6881
DOI:10.1007/s00606-013-0774-1