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Abstract Detail


Systematics Section / ASPT

Ojeda, Isidro [1], Allan, Gery [2], Santos-Guerra, Arnoldo [3], Cronk, Quentin [4].

A molecular phylogenetic analysis of Macaronesian Lotus (Legumonisae) inferred from homologues of CYCLOIDEA: insights into the evolution of bird pollination.

ABOUT 40 species of Lotus are distributed in the Macaronesian region, where 75 % of these species are endemic and at least 16 species are considered under some level of threat. All these species have zygomorphic flowers (bilateral symmetry) with five petals: a dorsal standard, two lateral petals and two ventral petals, and most of them display morphological characteristics that suggest a bee pollination syndrome; however, there is a group of species from the Canary Islands (Spain) with distinctive red, red-orange or orange-yellow flowers suggesting generalist birds as pollinators. These species also differ from the others in the size, shape and disposition of the petals, especially the dorsal and the ventral petals. A previous phylogenetic study of Lotus using ITS (Allan et al., 2004) did not provide complete resolution of all the Canary Island clades. We present a comparative study of these two contrasting flower morphologies and a preliminary phylogenetic analysis of this group using homologues of CYCLOIDEA, a gene known to be associated with flower symmetry and petal identity in Antirrhinum majus and Lotus japonicus


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1 - University of British Columbia, Botanical Garden and Centre for Plant Research. Department of Botany, 6804 SW Marine Drive, Vancouver, British Columbia, V6T 1Z4, Canada
2 - Northern Arizona University, Biological Sciences Department and Environmental Genetics and Genomics Laboratory, Flagstaff, AZ, USA, Flagstaff, Arizona, , USA
3 - Jardin de Aclimatacion de la Orotava, Calle Retama Numero 2, Puerto de la Cruz, Teneri, Canary Islands, E-38040, Spain
4 - University of British Columbia, Botanical Garden And Centre For Plant Research, 6804 Sw Marine Drive, Vancouver, British Columbia, V6T 1Z4, Canada

Keywords:
Lotus
Macaronesia
CYCLOIDEA
Flower morphology
Bird pollination
evolution.

Presentation Type: Poster:Posters for Sections
Session: 48-175
Location: Auditorium/Bell Memorial Union
Date: Tuesday, August 1st, 2006
Time: 12:30 PM
Abstract ID:699


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