Reproductive success of four species of Eugenia L. (Myrtaceae)

Acta Botanica Brasilica

André Luiz Gomes Da Silva²  Maria Célia Bezerra Pinheiro¹ 

[1] ,Universidade Federal do Maranhão Centro de Ciências Agrárias e Ambientais Chapadinha MA ,Brazil

关键词: breeding system;    Eugenia;    Myrtaceae;    reproductive success;    seed herbivory;    Eugenia;    herbivoria de sementes;    Myrtaceae;    sistema de reprodução;    sucesso reprodutivo;   

DOI  :  10.1590/S0102-33062009000200024

来源: SciELO

【 摘 要 】

Eugenia uniflora,E. punicifolia,E. neonitida and E. rotundifolia are perennial species, usually shrubs, which occur in the restinga of the Grumari Natural Municipal Park, in western Rio de Janeiro, Brazil. They have Papaver-type pollen-flowers that are hermaphrodite, polystemonous and pollinated mainly by bees. An assessment of the breeding systems showed that only E. uniflora and E. punicifolia are self-compatible. The fruit/flower, seed/ovule and seed/fruit ratios were calculated for each species. Fruit and seed predators were identified and predation rates were estimated. Total reproductive success for each species in the restinga was extremely low. In order to have one viable seed free from herbivore attack at the end of the reproductive process, the species would need to produce 312.5 E. uniflora, 9090.9 E. neonitida, 11111.1 E. punicifolia and 19230.8 E. rotundifolia flowers. In short, the reproductive success of the four species is affected by pollination efficiency, low seed/ ovule ratios and mainly, high predation rates. Mass flowering strategy in these species can minimize low reproductive efficiency, thus ensuring the maintenance of population dynamics.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License