|
Pak. J. Bot., 48(1): 201-210, 2016. |
Back to Contents | ||||
|
|
Updated: 29-02-16 | ||||
|
|
THE PHYLOGENETIC SIGNIFICANCE OF FRUIT STRUCTURAL VARIATION IN THE TRIBE HETEROMORPHEAE (APIACEAE)
MEI LIU1*, BEN-ERIK VAN WYK2, PATRICIA M. TILNEY2, GREGORY M. PLUNKETT3 AND PORTER P. LOWRY II4,5 AND ANTHONY R. MAGEE6
Abstract: Fruit structure of Apiaceae was studied in 19 species representing the 10 genera of the tribe Heteromorpheae. Our results indicate this group has a woody habit, simple leaves, heteromorphic mericarps with lateral wings. fruits with bottle-shaped or bulging epidermal cells which have thickened and cutinized outer wall, regular vittae (one in furrow and two in commissure) and irregular vittae (short, dwarf, or branching and anatosmosing), and dispersed druse crystals. However, lateral winged mericarps, bottle-shaped epidermal cells, and branching and anatosmosing vittae are peculiar in the tribe Heteromorpheae of Apioideae sub family. Although many features share with other early-diverging groups of Apiaceae, including Annesorhiza clade, Saniculoideae sensu lato, Azorelloideae, Mackinlayoideae, as well as with Araliaceae. Our study shows that fruit anatomy can be used to define the tribe by molecular phylogenetic studies and support that Heteromorpheae are close to Annesorhiza clade and both are placed in the basal position of Apioideae.
Key words: Apiaceae, Heteromorpheae, Fruit anatomy, Wing, Phylogeny.
1Department of Biology, Harbin Normal University, Harbin, People’s Republic of China 2Department of Botany and Plant Biotechnology, University of Johannesburg, Auckland Park, Johannesburg, South Africa 3Cullman Program for Molecular Systematics, The New York Botanical Garden, Bronx, New York, United States of America 4Missouri Botanical Garden, Saint Louis, Missouri, United States of America 5Département Systématique et Evolution (UMR 7205) Muséum National d’Histoire Naturelle, CP 39, 57 rue Cuvier, 75213 Paris CEDEX 05, France 6South African National Biodiversity Institute, Compton Herbarium, Private Bag X7, Claremont 7735, South Africa *Correspondence author’s e-mail: m.r.liu@126.com; Tel: +86 451 8806 0576; Fax: +86 451 8806 0575 |
||||
|
|
|||||
| Back to Contents |
|
Back to Contents | |||
|
|
|||||