Determinação da concentração ideal e do tempo ideal para a escarificação química da semente de Imbondeiro (Adansonia digitata)

Abstract

The present work was developed with the objective of determining the ideal concentration and the ideal time to scarify the seeds of Imbondeiro (Adansonia digitata). The seeds were subjected to a chemical scarification with sulfuric acid (96%, 72%, 48% and 0%) at different times of emergence (2h, 4h, 6h and 8h) to allow the fall of dormancy. After scarification, the seeds were placed to germinate in petri dishes at room temperature that varied between 25 to 35 * C. The germination control was done every 2 days and the results of the experiment were harvested after 5 weeks. Sulfuric acid was shown to break dormancy in the seeds of Imbondeiro (Adansonia digitata). There were differences in the percentage of germination in the different treatments (different concentrations of sulfuric acid at 8 hours of immersion time registered a germination percentage of 100%, it was the highest percentage of germination in the present work. The concentrations of 24% and 48% in the different immersion times tested in the present work proved to be inadequate for overcoming dormancy of Imbondeiro (Adansonia digitata) seeds as there was no germination in these treatments. In the control, 0% concentration, there was no germination showing that Imbondeiro seeds ( Adansonia digitata) need to break dormancy to germinate. (TRADUÇÃO NOSSA)