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Título: | Pollinator limitation and late-acting self-incompatibility mechanism as causes of low fruit set in two sympatric species of Inga (Fabaceae - Mimosoideae) in the Central Amazon |
Título(s) alternativo(s): | Limitação de polinizadores e mecanismo de autoincompatibilidade de ação tardia como causas da baixa formação de frutos em duas espécies simpátricas de Inga (Fabaceae - Mimosoideae) na Amazônia Central |
Autor: | Oliveira Barros, Eduardo Cristo de Webber, Antonio Carlos Machado, I. C. |
Data do documento: | 2013 |
Revista: | Rodriguesia |
É parte de: | Volume 64, Número 1, Pags. 37-47 |
Abstract: | The breeding system of Inga edulis Mart. and Inga stipularis D.C. was studied in an area of forest, located in the UFAM Experimental Farm, Manaus, AM, from November/2006 to November/2007. The results showed that both species do not set fruit from self-pollination and that the percentage of fruit set proceeding from cross-pollination in I. edulis (5%) and I. stipularis (21%) is superior to the natural pollination (control), 1% and 7%, respectively. The analyses of pollen tube, originating from self-pollination and cross-pollination, reveal that a small fraction reaches the ovules of I. edulis after 8 and 12 hours, and in I. stipularis 24 hours after pollinations. In addition there is a greater percentile of tubes penetrating in the ovules of I. edulis. The arrival speed of the tubes in the ovules deriving from self-pollination and cross-pollination is similar in both species. The low indices of fruit set in I. edulis and I. stipularis probably is a result from the raised index of geitonogamy promoted by the pollinators and the late-acting self-incompatibility. |
DOI: | 10.1590/S2175-78602013000100005 |
Aparece nas coleções: | Artigos |
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