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Revista Brasileira de Fruticultura

versão impressa ISSN 0100-2945

Resumo

DANNER, Moeses Andrigo et al. Reproductive mode and pollen viability of three jabuticaba tree species. Rev. Bras. Frutic. [online]. 2011, vol.33, n.2, pp.345-352.  Epub 15-Jul-2011. ISSN 0100-2945.  http://dx.doi.org/10.1590/S0100-29452011005000077.

The objective of this study was to determine the reproductive mode and the conditions for in vitro pollen viability testing of three jabuticaba tree species (Plinia cauliflora, P. trunciflora and P. jaboticaba). Observed fruit set in bagged and not bagged branches and aspects of floral morphology. Pollen viability was evaluated in culture medium with and without boric acid with pollen collected at different times after anthesis. Pollen germination of six genotypes was quantified before and after storage. P. trunciflora and P. jaboticaba are self-compatible, however the polinizer increase fruiting. The P. cauliflora requires polinizers for fruiting, because it has flowers with greater stigma-anther distance than the other two species, which prevents the passive self-pollination. Boric acid ads in the culture medium improve in vitro germination of jabuticaba tree pollen. The pollen viability is greater six hours after anthesis. It is possible the conservation of pollen for up to 90 days in freezer (-18ºC), if it has high initial germination (greater than 80%). These results will help in planning crosses in jabutica tree.

Palavras-chave : Plinia sp.; pollination; pollen storage; boron.

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