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This work aimed to evaluate the influence of thermic treatments to break the dormancy of Caesalpinia ferrea Mart. ex Tul. seeds. The experiment was conducted in a germination chamber of Biochemical Oxygen Demand (BOD) type. The statistical design was completely randomized with four repetitions of 25 seeds. The treatments consisted of immersing the seeds in heated water (T1 – 27°C, T2 – 70°C, T3 – 80°C, T4 – 90°C, and T5 – 100°C). The immersion time was 5 minutes. Each experimental unit contained 200 cm3 of expanded vermiculite distributed in gerbox box. We performed the analysis of variance and regression, both at 5.0% statistical significance. Treatments did not influence the emission of lateral roots. T5 Treatment presented more imbibed seeds (69.0%), germinated seeds (59.0%), shoot emission (56.0%), and germination speed index (2.12). These attributes increased as the raised temperature of immersion. We conclude that the dormancy of C. ferrea seeds can be overcome by immersion in heated water as a pre-germinative treatment. Immersing the seeds in the heated water at 100 °C for 5 minutes is efficient to break the dormancy of this species.

TRATAMENTOS TÉRMICOS PARA A SUPERAÇÃO DA DORMÊNCIA EM SEMENTES DE Caesalpinia ferrea MART. EX TUL.