Germinative behavior of Dipteryx odorata (Aubl.) Willd seeds

Abstract

Dipteryx odorata, the iron coumaru, is a tree species of the Fabaceae family, used in civil construction, urban afforestation and recovery of degraded areas. The work aimed to determine the imbibition curve and to evaluate the effect of light on the twinning of Dipteryx odorata seeds. The experiments were carried out at the Forest Seed Analysis Laboratory of the Federal University of Acre - UFAC, in a completely randomized design. For the imbibition curve, four repetitions of 25 seeds were soaked in distilled water and weighed over a period of 30 minutes and then every hour until the protrusion of the radicle. For the evaluation of photosensitivity, four replicates of 25 seeds were used, submitted to the presence of constant white light and absence of light at a constant temperature of 30 ° C. It was observed in imbibition, that the seeds absorbed water quickly, reaching 43% of imbibition in 12 hours of imbibition, following the three-phase pattern with emission of the primary root after 168 hours of imbibition. continuous light and dark condition.