Thermal scarification to overcome Piptadenia moniliformis seeds dormancy
DOI:
https://doi.org/10.5039/agraria.v9i1a2488Keywords:
forest species, germination, vigorAbstract
This study aimed to evaluate the performance of different thermal scarification methods to overcome Piptadenia moniliformis seeds dormancy. The thermal treatments used were: control (no treatment - T1); seed immersion in water at 80 and 100 °C for 10 (T2 and T6, respectively), 30 (T3 and T7, respectively) and 60 (T4 and T8, respectively) seconds; seed immersion in water at 80 °C until cooling to room temperature (28 °C) (T5), and seed immersion in water at 100 °C until cooling to room temperature (28 °C) (T9). The seeds were placed for germination in boxes with transparent lid, containing the blotting paper substrate, which was moistened with Nystatin solution. Later, they were placed in a Biochemical Oxygen Demand germinator, regulated at 30 °C under continuous light. The following parameters were evaluated: first germination counting; final germination; germination speed index; root and shoot length; and root and shoot dry mass. The thermal scarification using seed immersion in water at 80 °C for 10 and 30 seconds was efficient in overcoming dormancy in Piptadenia moniliformis seeds, presenting the highest germination and vigor percentage.
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