Biologia floral e da polinização de quatro espécies de Eugenia L. (Myrtaceae)

Silva, André Luiz Gomes da; Pinheiro, Maria Celia B

doi:10.1590/s0102-33062007000100022

Cited by 44 publications

(50 citation statements)

References 59 publications

(95 reference statements)

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“…Considering the pollination mechanism and the mass flowering of the studied species (Silva & Pinheiro 2007), self-compatibility can be responsible for an increase in fruit-set by geitonogamy, also reported in other Myrtaceae species (Lughadha & Proença 1996;Schmidt-Adam et al 2000;Torezan-Silingardi & Oliveira 2004;Gressler et al 2006). However, in complete or partial self-incompatible species, geitonogamy can be a limiting factor for fruit and seed production (Proença & Gibbs 1994;Mahoro 2003).…”

Section: Resultsmentioning

confidence: 56%

“…They are visited by a range of insects, including species of Hymenoptera, Coleoptera and Diptera. Considering the foraging behavior and intra flower movements of the visiting insects, bees are the main pollinators of these plants and of these Apis mellifera L. is the most frequent and abundant pollinator (Silva & Pinheiro 2007).…”

Section: Resultsmentioning

confidence: 99%

“…Comparing the fruit-set by natural pollination in the four species studied, which are pollinated by the same pollinator group (Silva & Pinheiro 2007), we were unable to determine which reproductive system was the most effective, because E. neonitida (a self-incompatible species) had higher rates of natural fruit-set than those of the two self-compatible species (Tab. 1), whereas E. rotundifolia (self-incompatible) had the lowest fruit-set (3.6%).…”

Section: Resultsmentioning

confidence: 99%

“…There is also a review paper on the topic (Gressler et al 2006) This article is part of a broader study about the reproductive biology of Eugenia uniflora L., E. punicifolia (Kunth) DC., E. neonitida Sobral and E. rotundifolia Casar in the restinga of Grumari, on the west coast of the city of Rio de Janeiro, Brazil. The floral and pollination biology results of these species have already been reported by Silva & Pinheiro (2007). The general objective of this study was to determine which factors limit seed production in this species.…”

Section: Introductionmentioning

confidence: 93%

“…Myrtaceae is an ecologically important family in Brazil's Atlantic Rainforest (Mori et al 1983) and represents the largest number of species in the Brazilian restinga (Araújo & Henriques 1984;Lemos et al 2001;Assis et al 2004). Important research on Myrtaceae reproductive biology has already been carried out in Brazil (Proença & Gibbs 1994;Torezan-Silingardi & Del-Claro 1998;Maués & Couturier 2002;Torezan-Silingardi & Oliveira 2004;Silva & Pinheiro 2007), in Africa (Wyk & Lowrey 1988) and in Australia (Beardsell et al 1993b). There is also a review paper on the topic (Gressler et al 2006) This article is part of a broader study about the reproductive biology of Eugenia uniflora L., E. punicifolia (Kunth) DC., E. neonitida Sobral and E. rotundifolia Casar in the restinga of Grumari, on the west coast of the city of Rio de Janeiro, Brazil.…”

Section: Introductionmentioning

confidence: 99%

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

Silva

Pinheiro

2009

Acta Bot. Bras.

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RESUMO -(Successo reprodutivo de quatro espécies de Eugenia L. (Myrtaceae)). Eugenia uniflora, E. punicifolia, E. neonitida e E. rotundifolia são espécies perenes, geralmente de porte arbustivo, que ocorrem na restinga do Parque Municipal Natural de Grumari, região oeste do Município do Rio de Janeiro, Brasil. Possuem flores-pólen do tipo Papaver, hermafroditas, polistêmones e polinizadas por abelhas. O sistema reprodutivo de cada espécie foi avaliado e os resultados mostraram que apenas E. uniflora e E. punicifolia são auto-compatíveis. De cada espécie foi avaliado o sistema de reprodução, as taxas fruto/flor, semente/óvulo e semente/fruto, além das taxas de predação de frutos e sementes e identificação dos seus agentes predadores. Com estes dados foram obtidos a taxa de fecundidade e o sucesso reprodutivo total de cada espécie. O sucesso reprodutivo total das quatro espécies foi muito baixo. Assim, para que no final do processo reprodutivo houvesse uma única semente viável e livre do ataque de herbívoros foi necessária a produção de 312,5 flores de E. uniflora, 9.090,9 de E. neonitida, 11.111,1 de E. punicifolia e 19.230,8 de E. rotundifolia. Em síntese, o sucesso reprodutivo total nas quatro espécies foi influenciado pelo sistema reprodutivo, pela razão semente/óvulo e, principalmente, pelas elevadas taxas de predação de frutos e sementes. A floração em massa destas espécies pode minimizar sua baixa eficiência reprodutiva, garantindo assim, a manutenção de sua dinâmica populacional. Palavras-chave:Eugenia, herbivoria de sementes, Myrtaceae, sistema de reprodução, sucesso reprodutivo ABSTRACT -(Reproductive success of four species of Eugenia L. (Myrtaceae)). 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.

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