Effect of temperature and pre-germination treatments on seed germination of juerana branca (Stryphnodendron pulcherrimum)

Aiming to define simple and effective methods to accelerate and standardize the germination of juerana branca (Stryphnodendron pulcherrimum) (white juerana), seeds of this species were subjected to four types of pre-germination treatments, testing at temperatures of 25 and 30°C. The treatments were: immersion in sulfuric acid for 15 min, immersion in water at 80°C for 5 min, immersion in water at 80°C for 10 min, and control (no treatment). The experiment was based on weekly observations and analysis of the seed germination process. A completely randomized experimental design with three replications was used. According to the results obtained, treatment with hot water at 80°C for 10 min is not recommended for germination of juerana branca seeds. The pre-germination treatment that could be recommended for pre germination treatment of juerana branca seeds is immersion in sulfuric acid for 15 min at 25°C.   Key words: Stryphnodendron pulcherrimu; barbatimao; dormancy.