Abstract
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.
Highlights
Stryphnodendron pulcherrimum, which belongs to the Fabacea Mimooideae family, has various popular names, such as barbatimão, jubarbatimão, juerana-branca, paricá, paricazinho and caubi
4) Dry matter = At the end of the experiment, the seedlings of each replication within each treatment were subjected to drying in a laboratory oven regulated at 100°C for 24 h, with the results being expressed in dry matter (g) per treatment; The experimental design used for data analysis was completely randomized design in a 2x4 factorial arrangement, with two temperatures and four pre-germination treatments, with distribution in three replications of 20 seeds each
Collection was made in July 2012. 480 seeds of juerana branca were selected and subjected to four types of pregermination treatments as follows: Treatment 1: Control; Treatment 2: Immersion in concentrated sulfuric acid (H2SO4) for 15 min, later washing with running water and drying; Treatment 3: Immersion in water at 80°C for 5 min, later washing with running water and drying; Treatment 4: Immersion in water at 80°C for 10 min, and later washing with running water and dry
Summary
Stryphnodendron pulcherrimum, which belongs to the Fabacea Mimooideae family, has various popular names, such as barbatimão, jubarbatimão, juerana-branca, paricá, paricazinho and caubi. According to Lorenzi (1992), juerana branca is a pioneer species that occurs preferentially in younger or older secondary forests of higher lands or well-drained sandy or clayey lands with medium fertility. This species annually produces a good quantity of seeds and is recommended for reforestation. 4) Dry matter = At the end of the experiment, the seedlings of each replication within each treatment were subjected to drying in a laboratory oven regulated at 100°C for 24 h, with the results being expressed in dry matter (g) per treatment; The experimental design used for data analysis was completely randomized design in a 2x4 factorial arrangement, with two temperatures and four pre-germination treatments, with distribution in three replications of 20 seeds each. Mean values were compared by the Tukey test at 5% probability level
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