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Paraphyly of Paederieae, recognition of Putorieae and expansion of Plocama (Rubiaceae-Rubioideae)
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolution, Genomics and Systematics, Systematic Botany.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolution, Genomics and Systematics, Systematic Botany.
2007 (English)In: Taxon, ISSN 0040-0262, Vol. 56, no 2, 315-328 p.Article in journal (Refereed) Published
Abstract [en]

Phylogenetic analyses of taxa that have been included in the tribe Paederieae are performed on the basis of a molecular dataset of plastid DNA sequences (the rbcL gene, rps16 intron, and the regions trnT-F). The paraphyly of Paederieae as currently circumscribed is confirmed. A clade comprising Paederia, Spermadictyon, Leptodermis, and Serissa is retrieved and the circumscription of Paederieae is proposed to be restricted to this clade. Paederia is sister to a clade with Spermadictyon, Leptodermis, and Serissa. Paederia is subdivided into an Asian and an African clade, and within the African clade seven species endemic to Madagascar are sister to P. pospischilii in north-eastern Africa. The position of Kelloggia as sister to Rubieae is confirmed and a position of Saprosma in the Spermacoceae alliance is supported. The genera Putoria, Gaillonia (with segregates), Plocama, and Aitchisonia form a clade that is sister to Theligoneae/Kelloggia/Rubieae. The name Putorieae is resurrected for the members of this clade. A synopsis of Putorieae is provided, where all species are placed in an expanded Plocama with 34 species. Thirty-one new combinations in Plocama are proposed. Plocama pendula on the Canary Islands is strongly supported as sister to a clade with P. crocyllis (former Crocyllis) in southern Africa and P. yemenensis and P. tinctoria (former Gaillonia) in southern Arabia/Horn of Africa.

Place, publisher, year, edition, pages
2007. Vol. 56, no 2, 315-328 p.
Keyword [en]
Gaillonia, molecular phylogenetics, Paederieae, Plocama, Putorieae, rbcL, rps16, Rubiaceae, trnT-F
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:uu:diva-93716ISI: 000247420000006OAI: oai:DiVA.org:uu-93716DiVA: diva2:167283
Available from: 2005-11-10 Created: 2005-11-10 Last updated: 2011-02-03Bibliographically approved
In thesis
1. Phylogenetic Studies in the Gentianales – Approaches at Different Taxonomic Levels
Open this publication in new window or tab >>Phylogenetic Studies in the Gentianales – Approaches at Different Taxonomic Levels
2005 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis deals with phylogenetic relationships at different taxonomic levels. All the plants studied are or have been included in the order Gentianales, which comprises about 17 200 species. The phylogenies are based on parsimony analyses of nucleotide sequence data (DNA) from different regions in the chloroplast genome, but morphological characteristics have also been studied.

Analyses of sequence data from the genes rbcL and ndhF provide the interfamilial structure of the order Gentianales, shown to comprise the families Apocynaceae (incl. Asclepiadaceae), Gelsemiaceae, Gentianaceae, Loganiaceae, and Rubiaceae. Exclusion of certain genera from the Loganiaceae is confirmed and their phylogenetic positions are clarified. Some of these genera remain within the Gentianales, while others belong to other orders. Exclusion of the tribe Buddlejeae from the Loganiaceae is confirmed, and a monophyletic group formed by Buddleja, Emorya, Gomphostigma, and Nicodemia is recognized and placed in the Lamiales. The Loganiaceae s.str. forms, after these exclusions, a strongly supported monophyletic group comprising 13 genera.

The tribe Paederieae in the family Rubiaceae is analysed using sequence data from the regions rbcL gene, rps16 intron, and the regions trnT-F, and is shown to be paraphyletic. These results lead to a new circumscription of Paederieae comprising the genera Leptodermis, Paederia, Serissa, and Spermadictyon. The tribe Putorieae is reestablished with the single genus Plocama, including 34 species. Aitchisonia, Choulettia, Crocyllis, Gaillonia, Jaubertia, Pseudogaillonia, Pterogaillonia, and Putoria are reduced to synonyms of Plocama based on the molecular analyses and morphological studies.

The Mediterranean species of the re-circumscribed Plocama, previously segregated as the genus Putoria, are revised. Two species, Plocama calabrica and P. brevifolia, are recognized, their synonymics are established, and seven lectotypes are selected.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2005. 42 p.
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 117
Keyword
Biology, Gentianales, phylogeny, classification, rbcL, trnT-F, rps16, ndhF ndh, Paederieae, Putorieae, Rubiaceae, Loganiaceae, Buddlejaceae, Gelsemiaceae, Apocynaceae, Gentianaceae, Biologi
National Category
Biological Sciences
Identifiers
urn:nbn:se:uu:diva-6124 (URN)91-554-6393-2 (ISBN)
Public defence
2005-12-02, Lindahlsalen, Evolutionsbiologiskt centrum, Norbyvägen 18A, 2 vån., SE-752 36 Uppsala, 10:00 (English)
Opponent
Supervisors
Available from: 2005-11-10 Created: 2005-11-10 Last updated: 2009-04-02Bibliographically approved

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