Abstract

VARGAS-SIMON, Georgina; LOPEZ-MENDEZ, Deyanira  and  PIRE, Reinaldo. Morphology of Fruit and Seed, and Pregerminative Treatments of Annona reticulata. Caldasia [online]. 2022, vol.44, n.2, pp.231-240.  Epub May 23, 2024. ISSN 0366-5232.  https://doi.org/10.15446/caldasia.v44n2.90873.

Annona reticulata is a poorly domesticated native Annonaceae species of the neotropics, commonly found in home gardens and its fruit is of nice flavor. As part of the strategies for germplasm conservation, and, taking into account that certain pregerminative treatments may favor its germination capacity, two objectives were pursued: the morphological characterization of fruits and seeds, and the assessment of its response to pregerminative treatments. Samples were collected in two municipalities of Tabasco State, Mexico. Dimensions of fruits and seeds were measured, and seeds were submitted to six pre-germinative treatments as follows, control (T1), mechanical scarification (T2), soaking in gibberellic acid (GA3 100 mg L-1 for 3 h) (T3), soaking in GA3 (100 mg L-1 for 6 h) (T4), soaking in GA3 a 200 mg L-1 for 3 h (T5), and mechanical scarification + soaking in GA3 (100 mg L-1 for 24 h) (T6). The germination percentage (GP) and rate (GR) were evaluated in a completely randomized design with five replications. The fruit averaged 422.2 g, with 116.8 seeds. The pulp is 69.22 % of the total fruit weight. Epigeal cryptocotylar germination started on day 17 and reached its maximum (76.6 %) on day 31. The mechanical scarification (T2) produced the highest values of GP, and GR, while the use of GA tended to result in lower values as the concentrations and soaking times of the product increased.

Keywords : Epigeal cryptocotylar; germination rate; gibberellic acid; mechanical scarification.

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