ÁCIDO CLORÍDRICO (HCL) PARA SUPERAÇÃO DE DORMÊNCIA EM SEMENTES DE JUREMA PRETA

Abstract

Jurema Preta, a native forest species of the Caatinga biome predominant in the semiarid region, is relevant for agricultural, beekeeping, medicinal and religious uses. The objective of this study was to evaluate the effect of hydrochloric acid in overcoming dormancy in the germination process of Mimosa tenuiflora (Jurema Preta). This experiment was conducted at the Laboratory of Phytoscience, of the Instituto Federal Goiano – Campus Hidrolândia. The design was completely randomized, with five treatments and 40 replicates. The experimental unit was the seed, totaling 200 experimental units (n = 200). The treatments were: intact seeds (T0), immersion in hydrochloric acid (HCl) – purity of 37% for five (T1), ten (T2), fifteen (T3) and twenty minutes (T4). The evaluation parameters were the percentage of normal and abnormal seedlings, germination speed index (GSI), percentage of dead seeds, percentage of non-germinated seeds, average root length (AR) and seedling height (H). Statistically significant results indicated that Mimosa tenuiflora seeds immersed for five minutes (treatment T1) in hydrochloric acid provided a higher germination rate and higher GSI. Treatments T3 and T4 resulted in seedlings with greater height and root length, due to less competition for water in the environment, resulting from the lower number of germinated seedlings.