POLLINATION AND ASPERMIA IN ANNONACEAEM.C.T. PEREIRA, R.A.N. FARIA, A.M.S.S. DAVID, J.F. SILVA S. PIMENTA, S. NIETSCHE, B.R.A. RODRIGUES, A.M.L. PIMENTA, F.S. GOMES, F.C. OLIVEIRA, G.B. OLIVEIRA, A.R. SANTOS, E.A. PARAIZO, H.T.R. AMARO, J.B. BORGES, J.R.P SANTOS AND H.K.C. FREITASAbstract Abstractâ This review presents advances in studies on pollination and aspermia in annonaceae of economic importance: custard apple, atemoya and soursop. The use of artificial pollination is essential for greater set rate, uniformity and fruit size. The condition of absence of seeds (aspermia) in species of the genus Annona occurs naturally by stenospermy, where the fruit partially contains formed seeds that were aborted after fertilization, or artificially, by the induction of parthenocarpy with the use of phytohormones. Stenospermy in A. squamosa is justified by the INO gene suppression, which causes lack of integument in the ovule and rupture of the integument adjacent to the perisperm. For parthenocarpy induction, the use of gibberellic acid has promoted good results in fruit set, quality and size, in addition to obtaining quality seedless fruits. Knowledge of parthenocarpy induction, stenospermy and seed development in fruits is relevant to ensure advances in breeding programs in the development of superior genotypes with seedless fruits, and quality parthenocarpic fruits. |