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Evolutionary Studies in Asterids Emphasising Euasterids II
Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology, Department of Systematic Botany.
2002 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis deals with evolutionary relationships within the asterids, a group of plants comprising about one-third of all flowering plants.

Two new families are recognised: Pennantiaceae and Stemonuraceae. The woody Pennantia from New Zealand and Australia is the sole genus of Pennantiaceae. Stemonuraceae consist of a dozen woody genera with a pantropical distribution and a centre of diversity in South East Asia and the Malesian islands. They are characterised by long hairs on their stamens and/or fleshy appendages on their fruits. Both families were formerly included in Icacinaceae. While Pennantiaceae are unrelated to any of the former Icacinaceae and placed in the order Apiales, other former Icacinaceae genera are related to Cardiopteris, a twining herb from South East Asia and Malesia. The monogeneric family Cardiopteridaceae is enlarged as to include also these. Cardiopteridaceae and Stemonuraceae are sister groups and placed in Aquifoliales. The three other families of Aquifoliales are monogeneric and closely related. The Asian Helwingiaceae and the Central/South American Phyllonomaceae are suggested to be merged into Aquifoliaceae (hollies). The genera of Icacinaceae in the traditional sense not placed in any of the above families (all euasterids II) are members of early diverging lineages of the euasterids I and possibly included in the order Garryales.

The three woody Australasian families Alseuosmiaceae, Argophyllaceae, and Phellinaceae are confirmed as members of Asterales, despite traditional placements not close to that order. They are, moreover, supported as each other’s closest relatives.

The results are based mainly on parsimony analysis of DNA sequence data, but morphological studies have revealed characters in support for the molecularly based conclusions. The gene that has provided most new information is the chloroplast ndhF gene. The results are, however, drawn from combined analyses of sequences from one or several additional genes (atpB, matK, rbcL, 18S rDNA). The data have also been explored with Bayesian analysis, a statistical, model-based method that most recently has been developed for phylogeny reconstruction.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis , 2002. , p. 50
Series
Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1104-232X ; 761
Keywords [en]
Organismic biology, Apiales, Aquifoliales, Asterales, asterids, Bayesian inference, Cardiopteridaceae, DNA sequence data, Icacinaceae, morphology, parsimony, Pennantiaceae, phylogeny, Stemonuraceae
Keywords [sv]
Organismbiologi
National Category
Microbiology
Research subject
Systematic Botany
Identifiers
URN: urn:nbn:se:uu:diva-2696ISBN: 91-554-5436-4 (print)OAI: oai:DiVA.org:uu-2696DiVA, id: diva2:162068
Public defence
2002-11-15, Lindahlssalen, Evolutionsbiologiskt centrum, Norbyv. 18, 752 36 Uppsala, Uppsala, 09:00
Opponent
Available from: 2002-10-24 Created: 2002-10-24Bibliographically approved
List of papers
1. Evolution of the Australasian families Alseuosmiaceae, Argophyllaceae, and Phellinaceae
Open this publication in new window or tab >>Evolution of the Australasian families Alseuosmiaceae, Argophyllaceae, and Phellinaceae
1999 (English)In: Systematic Botany, ISSN 0363-6445, E-ISSN 1548-2324, Vol. 24, no 4, p. 660-682Article in journal (Refereed) Published
Abstract [en]

Based on results from cladistic analyses of morphology and DNA sequences (the two chloroplast genes rbcL and ndhF), the three Australasian families Alseuosmiaceae, Argophyllaceae, and Phellinaceae are each monophyletic, belong within Asterales, and together form a monophyletic group. Two new rbcL sequences and thirteen new ndhF sequences were obtained. Congruence tests did not reveal any significant incongruence between the two molecular data sets or between the molecular and morphological data. The character evolution of the Alseuosmiaceae-Argophyllaceae-Phellinaceae group is discussed. The Australasian ancestor of this group was probably a woody plant with simple, alternate, serrate leaves and regular, choripetalous, epigynous flowers borne in panicles. All tree families should be retained in line with the "principle of ease of identification."

National Category
Natural Sciences
Identifiers
urn:nbn:se:uu:diva-90032 (URN)
Available from: 2002-10-24 Created: 2002-10-24 Last updated: 2017-12-14Bibliographically approved
2. Alseuosmiaceae. To be published in Families and Genera of Vascular Plants, eds. K. Kubitzki et al.
Open this publication in new window or tab >>Alseuosmiaceae. To be published in Families and Genera of Vascular Plants, eds. K. Kubitzki et al.
Article in journal (Refereed) Accepted
Identifiers
urn:nbn:se:uu:diva-90033 (URN)
Available from: 2002-10-24 Created: 2002-10-24Bibliographically approved
3. Argophyllaceae. To be published in Families and Genera of Vascular Plants, eds. K. Kubitzki et al
Open this publication in new window or tab >>Argophyllaceae. To be published in Families and Genera of Vascular Plants, eds. K. Kubitzki et al
Article in journal (Refereed) Accepted
Identifiers
urn:nbn:se:uu:diva-90034 (URN)
Available from: 2002-10-24 Created: 2002-10-24Bibliographically approved
4. Multiple origin of the tropical forest tree family Icacinaceae
Open this publication in new window or tab >>Multiple origin of the tropical forest tree family Icacinaceae
2001 In: American Journal of Botany, Vol. 88, no 12, p. 2259-2274Article in journal (Refereed) Published
Identifiers
urn:nbn:se:uu:diva-90035 (URN)
Available from: 2002-10-24 Created: 2002-10-24Bibliographically approved
5. Not just hollies – the expansion of Aquifoliales
Open this publication in new window or tab >>Not just hollies – the expansion of Aquifoliales
Manuscript (Other academic)
Identifiers
urn:nbn:se:uu:diva-90036 (URN)
Available from: 2002-10-24 Created: 2002-10-24 Last updated: 2010-01-13Bibliographically approved
6. The family Pennantiaceae and its relationships to Apiales
Open this publication in new window or tab >>The family Pennantiaceae and its relationships to Apiales
2003 (English)In: Botanical journal of the Linnean Society, ISSN 0024-4074, E-ISSN 1095-8339, Vol. 141, no 1, p. 1-24Article in journal (Refereed) Published
Abstract [en]

The early evolution of the flowering plant order Apiales is discussed based on information from morphology and DNAsequences from four genes (ndhF,rbcL,atpBandmatK). A model-based approach of analysis, Bayesian inference, isused to analyse the data and the results are compared with those from parsimony analysis. In particular, a new familyof the order, the monogeneric Pennantiaceae from New Zealand and Australia, aids in the understanding of howthe order originated. The ancestor of Apiales was probably a shrub or small tree with alternate, simple leaves, paniculateinflorescences, five-merous flowers with free petals, and drupes.

National Category
Natural Sciences
Identifiers
urn:nbn:se:uu:diva-90037 (URN)10.1046/j.1095-8339.2003.00110.x (DOI)
Available from: 2002-10-24 Created: 2002-10-24 Last updated: 2017-12-14Bibliographically approved

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