Morfologia e biologia floral de cinco especies de Passiflora L. (Passifloraceae)

AUTOR(ES)
DATA DE PUBLICAÇÃO

1993

RESUMO

A comparative study of floral morphology and biology of five Passiflora species (P. alata, P. amethystina, P. capsularis, P. miersii and P. suberosa.), was carried out in the Santa Genebra Forest Reserve, Campinas, São Paulo. Passiflora alata, P. amethystina and P. miersii have purple to violet flowers, variegated filamentose corona, membranous operculum and campanulate calix tube. These species blossom in the wet season. Their flowers open early in the morning and last about 12 hours; they have sweet odour; the corona is a nectar guide and the nectar sugar concentration ranges from 31 to 41%, they are allogamous and the main pollinators are large bees. P. amethystina and P. miersii have similar floral morphology, but differ from P. alata in having a row of free filaments on the edge of the operculum. The operculum in P. alata is horizontally incurved and denticulate at the margin. These characteristics of the operculum require different behaviours from bees during their visits. Passiflora suberosa has inconspicuous green-yellowish flowers, with corona filaments in two serias and a plicate operculum. Its flowers blossom during the whole year, opening at 06:00 a.m. and lasting about 12 hours. The odour in imperceptible and the nectar sugar concentration is 25%. They are self compatible and the main pollinators are wasps. Passiflora capsularis has white flowers, with corona filaments in one serias and a plicate operculum. Its flowers blossom from October to lasting about 13 hours. They have a sweet scent and the nectar that bee pollinated Passiflora species are probably ancestral to species with other pollinators (lepidopterous, hummingbirds, bats)

ASSUNTO(S)

passiflora - morfologia morfologia vegetal

ACESSO AO ARTIGO

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