TRATAMENTOS PARA SUPERAÇÃO DE DORMÊNCIA EM SEMENTES DE PASSIFLORA CINCINNATA EM DIFERENTES CONDIÇÕES DE ARMAZENAMENTO

• DOI: https://doi.org/10.22533/at.ed.2311425140415

• Palavras-chave: Passiflora; GA 4+7 + N-(fenilmetil)-aminopurina; Vigor;

• Keywords: Passiflora; GA 4+7 + N-(phenyl methyl)-aminopurin; Vigor

• Abstract: The use of growth regulators as a seed treatment has proven to be an effective alternative for overcoming dormancy and stimulating seedling emergence and initial development. This chapter presents the results of a study aimed at evaluating the effect of different concentrations of the growth regulators GA₄+₇ + N- (phenylmethyl)-aminopurine on overcoming dormancy in freshly harvested and six-year stored seeds of Passiflora cincinnata Mast. The experiment was conducted in a greenhouse at Embrapa Cassava and Fruits, using a completely randomized design in a 2 x 5 factorial scheme with four replications of 25 seeds. The factors analyzed were two storage times (2010 and 2016) and five concentrations of growth regulators (0.0%, 0.03%, 0.45%, 0.90%, and 1.80%). Control seeds were soaked in distilled water, while the others were immersed in aqueous solutions of the growth regulators for 24 hours. The evaluated variables included emergence percentage, first count, emergence speed index, plant height, root length, stem diameter, shoot dry mass, root dry mass, total dry mass, and root/shoot ratio. The results showed that GA₄+₇ + N-(phenylmethyl)- aminopurine is effective in breaking dormancy in P. cincinnata seeds, whether freshly harvested or stored for six years under cold conditions. Concentrations ranging from 0.03% to 0.90% effectively promoted seed emergence. It was concluded that P. cincinnata seeds remain physiologically viable for up to six years when properly stored, and that the use of growth regulators enhances their emergence.