Phylogenetic relationships and patterns of morphological evolution in the Old World species of Passiflora (subgenus Decaloba: supersection Disemma and subgenus Tetrapathaea) [electronic resource] /
Abstract: The classification of the species of Old World species of Passiflora (subgenus Decaloba, supersection Disemma, Tetrapathaea, and Hollrungia) has been historically unresolved. Molecular and morphological data were used to examine the evolutionary relationships in this group. Two clades are supported: first, subgenus Decaloba supersection Disemma, and second, a clade representing a new subgenus with three species, Passiflora tetrandra, P. aurantioides, and P. kuranda. Supersection Disemma is monophyletic, containing an Asian section, Octandranthus, and an Australian section, Disemma. Passiflora hollrungii (section Hollrungiella) from Papua New Guinea is resolved ambiguously. In section Octandranthus three species exhibit variation in stamen and carpel number. Passiflora tonkinensis (= Passiflora moluccanavar. glaberrima) and P. siamica, were investigated to determine mode of development and the mechanism behind the anomalous growth. Passiflora siamica develops additional stamens through de?doublement of a single widened stamen primordium. Passiflora moluccanavar. glaberrima exhibits congenital de?doublement where stamens arise from the floral apex already doubled.
School:The Ohio State University
School Location:USA - Ohio
Source Type:Master's Thesis
Keywords:passiflora passifloraceae decaloba disemma octandranthus hollrungiella anomalous floral development tetrapathaea hollrungia
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