Biologia reprodutiva de Copaifera langsdorffii Desf. (Leguminosae, Caesalpinioideae)
A survey on the phenology and reproductive biology of Copaifera langsdorffii Desf. was carried out in a cerradão area at Fazenda Capim Branco, Uberlândia, MG. Flowering occurs during the rain season and seed dispersal during the dry season. Flowers are pale-green, 0.5 cm in diameter, weakly zigomorp...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2002 |
| País: | Brasil |
| Institución: | Universidade de Brasília (UnB) |
| Repositorio: | Repositório Institucional da UnB |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.unb.br:10482/25872 |
| Acceso en línea: | http://repositorio.unb.br/handle/10482/25872 https://dx.doi.org/10.1590/S0100-84042002000300007 |
| Access Level: | acceso abierto |
| Palabra clave: | Cerrados Polinização |
| Sumario: | A survey on the phenology and reproductive biology of Copaifera langsdorffii Desf. was carried out in a cerradão area at Fazenda Capim Branco, Uberlândia, MG. Flowering occurs during the rain season and seed dispersal during the dry season. Flowers are pale-green, 0.5 cm in diameter, weakly zigomorphic and organized in paniculate inflorescences. They are highly odoriferous, one-day flowers. Anthesis begins at about 5:00 h. The nectar production is very small (0.2 ml) with 49% of sucrose equivalents. The most frequent flower visitors and pollinators were Apis mellifera, Scaptotrigona cf. depiles and Trigona spinipes bees. Controlled hand-pollinations showed that the species is mostly self-sterile and non-apomictic. However, pollen tubes were observed growing down to the ovary and penetrating the ovules in self-pollinated pistils, a fact which suggests late-acting self-sterility phenomena or inbreeding depression. Fruit-set was always low and related to low flower to fruit conversion, may be due to inefficient pollination and fruit predation. |
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