Pollination of Adenocalymma bracteatum (Bignoniaceae): floral biology and visitors.
Neotrop Entomol
; 39(6): 941-8, 2010.
Article
em En
| MEDLINE
| ID: mdl-21271062
Adenocalymma bracteatum is a shrub of dense foliage and yellow flowers, easily found on grasslands areas in Central Brazil. The aim of this study was to determine the reproductive biology and the flower visitors of A. bracteatum in a pasture area nearby Ivinhema city, MS (Brazil). The flowering peak occurs in winter. The flower reflects ultraviolet light. Anthesis begins at 6:30h, and pollen and nectar are the resources to visitors. We captured 1,038 floral visitors. The bees Apis mellifera (L.), Trigona sp., Trigona spinipes (Fabricius), (Hymenoptera: Apoidea) and the ant Cephalotes sp. (Hymenoptera: Formicidae) were the main visitors. The reproductive tests indicate that A. bracteatum is self compatible, justifying its expansion in altered environments; however, the largest reproductive success was dependant on cross-pollination and self-pollination, evidencing the pollinators importance. Adenocalymma bracteatum presents melittophilous syndrome and bumblebees were the main pollinators in the area. The correlations observed between the climatic variables and the main pollinator species were low or medium.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Bignoniaceae
/
Flores
/
Polinização
/
Insetos
Limite:
Animals
Idioma:
En
Revista:
Neotrop Entomol
Assunto da revista:
BIOLOGIA
Ano de publicação:
2010
Tipo de documento:
Article
País de publicação:
Holanda