Production of pequi tree seedlings under different dormancy breaking methods
DOI:
https://doi.org/10.6008/CBPC2179-6858.2021.007.0014Keywords:
Caryocar brasiliense, Plant propagation, Phytohormone, CerradoAbstract
The production of pequizeiro seedlings (Cariocar brasiliense) through seeds is directly affected by the presence of dormancy. As a result, the present study aimed to evaluate techniques for breaking dormancy of dispersion units (putamen) of pequi, using mechanical methods (scarification) and phytohormonal treatment with gibberellic acid. To this end, an experiment was set up in a nursery with a randomized block design, in a 3x3 factorial scheme and four replications. The fruits were collected ripe soon after their fall. The epicarp and mesocarp were removed, obtaining the putamen. The treatments consisted of using scarified and non-scarified putamens, immersed for 96 hours in gibberellic acid solution in doses of 1, 2 and 3 g dm-3. After the appearance of the first seedling, the mean seedling emergence time, emergence speed index and the emergence percentage were determined. The doses of gibberellic acids influenced the germination percentage, regardless of the scarification method, with the doses of 2 and 3 g.dm-3 providing the best results. The treatments with scarification on 1 and 2 faces of the seed provided better results of percentage of germination, in comparison to the non-scarified.
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