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Type: Article
Published: 2017-03-07
Page range: 1–19
Abstract views: 17
PDF downloaded: 1

The systematic value of pollen morphology of Passiflora subgenus Astrophea (Passifloraceae)

Departamento de Botânica, Museu Nacional/UFRJ, Quinta da Boa Vista, São Cristovão, 20940-040, Rio de Janeiro, RJ, Brasil
Departamento de Botânica, Museu Nacional/UFRJ, Quinta da Boa Vista, São Cristovão, 20940-040, Rio de Janeiro, RJ, Brasil
Universidade Federal Rural do Rio de Janeiro, Instituto Três Rios, Departamento de Ciências do Meio Ambiente, Avenida Prefeito Alberto da Silva Lavinas 1847, Centro, 25802-100, Três Rios, RJ, Brasil.
Departamento de Botânica, Museu Nacional/UFRJ, Quinta da Boa Vista, São Cristovão, 20940-040, Rio de Janeiro, RJ, Brasil
Astrophea intectate exine granulate-baculate-spinose exine palynology taxonomy Eudicots

Abstract

This study investigates and reports the pollen morphology of a selected group of Passiflora species of the subgenus Astrophea. We found that species can be grouped into five pollen types, four of which had been previously documented. The fifth new pollen type was observed in P. macrophylla. This pollen type completely lacks muri, and possesses spines and bacula on a granulate surface. All of the species of the subgenus Astrophea studied have the same type of aperture: 6-colporate with 3 lalongate endoapertures, one for each pair of ectoapertures. Multivariate analyses performed with quantitative characters showed a great degree of similarity between type I, II and V pollen, and individual distinction of type III and type IV. The pollen characters observed do not support the currently accepted taxonomic classification for the Passiflora subgenus Astrophea, but are useful for delimiting species.