Data/hora: 11/06/2024 04:54:12

Provedor de dados: | 39
País: | Brazil
Título: | Functional specialization and phenotypic generalization in the pollination system of an epiphytic cactus
Autores: | Martins,Cristiane; Freitas,Leandro.
Data: | 2018-09-01
Ano: | 2018
Palavras-chave: | Cactaceae; Floral biology; Montane rain forest; Oligolectic bees; Pollinators; Reproductive system; Rhipsalis; Self-incompatibility.
Resumo: | ABSTRACT Plant-pollinator interactions range from obligatory specialists to facultative generalists, and floral morphology and pollination system may not match completely. The floral biology, reproductive system and floral visitors of a species of the tribe Rhipsalideae were investigated with a focus on the consistency between the pollination system and the floral phenotype. Rhipsalis neves-armondii is an obligate xenogamous species, due to self-sterility. Its flowers are white, small and diurnal, and radially symmetrical. These features, along with their small amount of nectar, characterize the flowers as phenotypic generalists. The most frequent pollinators were a solitary oligolectic species of Andrenidae (Rhophitulus solani), two species of Meliponinae (Trigona spinipes and T. braueri) and Apis mellifera. Despite the generalist floral phenotype, the pollination system is functionally specialized, since only small bees performed effective visits. Flowers of R. neves-armondii may represent a case of cryptic floral specialization in which attributes other than morphology act as filters, restricting them to a single functional group of pollinators. Moreover, the four most frequent species of pollinators cover a spectrum ranging from solitary oligolectic to social polylectic bees, including an exotic species. These results illustrate the distinct dimensions of specialization-generalization that may occur in the pollination process of a single species.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000300359
Editor: | Sociedade Botânica do Brasil
Relação: | 10.1590/0102-33062017abb0335
Formato: | text/html
Fonte: | Acta Botanica Brasilica  v.32 n.3 2018
Fonte: | info:eu-repo/semantics/openAccess