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Biosystematic studies on the family Nartheciaceae (Dioscoreales) I. Phylogenetic relationships, character evolution and taxonomic re-examination

Title
Biosystematic studies on the family Nartheciaceae (Dioscoreales) I. Phylogenetic relationships, character evolution and taxonomic re-examination
Authors
Fuse S.Lee N.S.Tamura M.N.
Ewha Authors
이남숙
SCOPUS Author ID
이남숙scopus
Issue Date
2012
Journal Title
Plant Systematics and Evolution
ISSN
0378-2697JCR Link
Citation
vol. 298, no. 8, pp. 1575 - 1584
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Generally, the family Nartheciaceae is thought to comprise Narthecium (7 spp.), Nietneria (2 spp.), Lophiola (2 spp.), Metanarthecium (1 sp.) and Aletris (ca. 30 spp.), but the taxonomy is quite controversial. To clarify nartheciaceous taxonomy, we conducted molecular phylogenetic analyses of four regions (atpB-rbcL, trnL, trnL-F and 18S rDNA; 4,048 bp in total) using 38 samples, and five regions (plus trnK; 6,337 bp in total) using 26 samples. The four- and five-region analyses indicated that Metanarthecium was the first to diverge from the Nartheciaceae, followed successively by Aletris, Lophiola, Nietneria and Narthecium. Metanarthecium has sometimes been considered congeneric with Aletris, but should be recognised as an independent genus. Aletris foliata, A. fauriei, A. formosana, A. glabra and A. sikkimensis have sometimes been considered conspecific, but this conclusion is not robustly supported. Originally, bifacial leaves and septal nectaries were present in the Nartheciaceae, but the leaves evolved to become unifacial and the septal nectaries were lost within the family, i. e. at the lineage of Narthecium, Nietneria and Lophiola. The ovary frequently shifted from the superior position to somewhat lower positions, and vice versa, in the Nartheciaceae. © 2012 Springer-Verlag.
DOI
10.1007/s00606-012-0660-2
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자연과학대학 > 생명과학전공 > Journal papers
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