PolinizaÃÃo e fenologia reprodutiva de Byrsonima gardnerana A. Juss. (Malpighiaceae) em Ãrea de Caatinga/Nordeste do Brasil

AUTOR(ES)

Elisangela LÃcia de Santana Bezerra

DATA DE PUBLICAÇÃO

2004

RESUMO

The flowers, which offer onlu oil as floral reward for their pollinators or pollen added to oil, are agrouped in nine families (Iridaceea e Orchidaceae â Monocots; Cucurbitaceae, Primulaceae, Krameriaceae, Malpighiaceae, Solanaceae, Calceolariaceae e Plantaginaceae - Eudicots), 79 genera and about 2.400 species, and are widespread for the entire world. The family Malpighiaceae is represented by about 60 genera and 1.100 tropical species, of this about 950 are met only in the New World. This family present 92% of neotropical species that have flower oils as first attractive, which are secreted by specialized gland called elaiophore. Their flowers are mainly pollinated by female bees of Centridini tribe, which uses the reward as energetic resource to diet of theirs offspring. Considering the ecology importance of the knowledge about phenology, floral biology and breeding systems os Stigmaphyllon paralias A. Juss. and Byrsonima gardnerana A. Juss. at the Parque Nacional do Catimbau, BuÃque/PE. Both species have melittophilous flowers. The flowering pattern of cornucopia type supplies an alternate flowering between the species, becoming the mais resource during the peak of flower production. The self-incompatibility, which was registred to both species, makes necessary the conservation of this ecosystem, because the decrease of populations os S. paralias and B. gardnerana can occasion the domino effect between the Centris species and others plant species of outhers families, which are pollinated by them. Therefore, it is necessary to concentrate effort on research in the Caatinga to know the developed adaptations of the species, which occur in this ecosystem.

ASSUNTO(S)

fenologia pollination caatinga malpighiaceae biologia floral floral biology centris polinizaÃÃo phenology caatinga malpighiaceae botanica centris

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