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

Content Provider	Springer Nature Link
Author	Tellería, María C. Sancho, Gisela Funk, Vicky A. Ventosa, Iralys Roque, Nadia
Copyright Year	2013
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.
Starting Page	935
Ending Page	948
Page Count	14
File Format	PDF
ISSN	03782697
Journal	Plant Systematics and Evolution
Volume Number	299
Issue Number	5
e-ISSN	16156110
Language	English
Publisher	Springer Vienna
Publisher Date	2013-03-14
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Gochnatieae Gochnatioideae Compositae Pollen LM SEM TEM Plant Sciences Plant Ecology Plant Anatomy/Development Plant Systematics/Taxonomy/Biogeography
Content Type	Text
Resource Type	Article
Subject	Plant Science Ecology, Evolution, Behavior and Systematics

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