Aspectos físicos e fisiológicos em sementes de Mimosa ophthalmocentra Mart. ex Benth.

Abstract

 This study aimed to characterize jurema-de-embira fruits and seeds, the process of water absorption and set the best pre-germination treatment to overcome dormancy. To characterize the biometric parameters of 100 fruits and 100 seed. For the characterization of the seed hydration, the process was carried out soaking curve of seed lots with and without lopping. We also evaluated nine pre-germinating treatments to overcome seed dormancy: control; cutting with scissors and scarification with sandpaper 80, at the opposite end to the hilum; hot water at 80 °C for 3, 6 and 12 minutes and sulfuric acid (H₂SO₄) for 3, 6 and 12 minutes, and evaluated the percentage and speed of germination index, shoot length and root dry weight of shoot, root and total. The seeds of jurema-of-embira have low variation for biometric features and the larger variations occur from plant materials. Seed germination starts after 19 hours of imbibition, regardless of plant material. The scarification with sandpaper 80 or emerges with scissors at the opposite end to the hilum are the methods set out to overcome dormancy in jurema-de-embira seeds.