uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Polyphyly of Polycarpon (Caryophyllaceae) inferred from DNA sequence data
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Organismal Biology, Systematic Biology. (Systematic Biology)
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Organismal Biology, Systematic Biology.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Organismal Biology, Systematic Biology.
2007 (English)In: Taxon, ISSN 0040-0262, Vol. 56, no 3, 775-782 p.Article in journal (Refereed) Published
Abstract [en]

A phylogenetic study of the genus Polycarpon was made using DNA sequence data from the chloroplast rps16 intron and nuclear RPB2 regions. Polycarpon as currently recognised is shown to be polyphyletic. The South American species P. coquimbense and P. suffruticosum are more closely related to Haya obovata (Socotra) and Polycarpaea spicata (paleotropical) than to the remaining species of Polycarpon, and the widespread tropical species P. prostratum is nested with Macaronesian species of Polycarpaea. All three should therefore be ex- cluded from Polycarpon. The remaining species, the P. tetraphyllum group, has its main diversity in the Medi- terranean region. It is a polyploid complex with morphologically very similar taxa mostly separated only by partially overlapping characters. The members of this group form a strongly supported, but largely unresolved clade. It is proposed that they are all included in a widely circumscribed P. tetraphyllum. The dehiscence of the capsules in P. tetraphyllum, by valves that elastically roll inwards and finally throw out the seeds, is unique in Caryophyllaceae and provides a strong synapomorphy for Polycarpon in this new restricted sense.

Place, publisher, year, edition, pages
2007. Vol. 56, no 3, 775-782 p.
National Category
Natural Sciences
Research subject
Biology with specialization in Systematics
URN: urn:nbn:se:uu:diva-166217OAI: oai:DiVA.org:uu-166217DiVA: diva2:475680
Available from: 2012-01-11 Created: 2012-01-11 Last updated: 2012-10-05
In thesis
1. Desert Plants and Deserted Islands: Systematics and Ethnobotany in Caryophyllaceae
Open this publication in new window or tab >>Desert Plants and Deserted Islands: Systematics and Ethnobotany in Caryophyllaceae
2012 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Background. Caryophyllaceae is a large and cosmopolitic flowering plant family, however the systematics of many of its basal groups has been unclear, due to a lack of unambiguous morphology. Some members of Caryophyllaceae are used medicinally, e.g. Corrigiola roots in Morocco. Monitoring the trade in medicinal plants is complicated due to the absence of useful identification characters in plant products such as roots, bark, and powders.

This thesis aims at elucidating the systematics and the ethnobotany of some of the basal clades in Caryophyllaceae. Methods. A comprehensive sampling from herbarium as well as market and field collected material was used in systematic studies combining morphological investigation, molecular phylogenetic and molecular dating analyses. Results. The data show that Polycarpon is polyphyletic, that Sphaerocoma is sister to Pollichia and shows some intraspecific variation, that Sanctambrosia falls within the genus Spergularia, and that both Spergula and Spergularia are monophyletic. Preliminary data suggest that Polycarpaea is polyphyletic and should be split into three larger and several smaller genera, that the members of Paronychia subgen. Anaplonychia will need to be transferred to Herniaria to maintain monophyly, and that Caryophyllaceae emerged during the Paleocene. All the major extant lineages originated in the Oligocene and diversified later. Using molecular identification it was possible to identify around 50% of the Moroccan medicinal roots to species level and an additional 30% to genus level. Discussion and conclusions. The polyphyletic Polycarpon needs to be split into at least three separate genera, but no name changes were made pending further research. The two species of Sphaerocoma were merged into one species with two subspecies. The San Ambrosio Island endemic Sanctambrosia, the only tree-like plant in Caryophyllaceae, is probably the result of a long distance dispersal event and its woody habit and gynodioecy are probably caused by inbreeding depression. Sanctambrosia manicata is transferred to Spergularia. Molecular identification put into practice on traded medicinal roots has a somewhat lower success rate than most theoretical studies, indicating that a global barcoding database would need to include reference sequences from a broad range of populations for each species.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2012. 52 p.
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 972
BEAST, Corrigiola, DNA barcoding, Morocco, Pollichia, Polycarpon, Polycarpaea, RAxML, Sanctambrosia, Spergula, Spergularia, Sphaerocoma
National Category
Biological Sciences Botany Biological Systematics
urn:nbn:se:uu:diva-179853 (URN)978-91-554-8471-2 (ISBN)
Public defence
2012-10-26, Lindahlsalen, Norbyvägen 18, Uppsala, 10:00 (English)
Available from: 2012-10-04 Created: 2012-08-24 Last updated: 2013-04-02

Open Access in DiVA

No full text

Search in DiVA

By author/editor
Kool, Anneleen
By organisation
Systematic Biology
In the same journal
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 291 hits
ReferencesLink to record
Permanent link

Direct link