Thermal scarification to overcome Piptadenia moniliformis seeds dormancy.

de S. Ferreira, Elane G. B.; Matos, Valderez P.; Silva, Romário B.; Santos, Helder H. D.; Sena, Lúcia H. M.

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.

PIPTADENIA; SEED dormancy; HEAT treatment; WATER immersion; BIOCHEMICAL oxygen demand; NYSTATIN; GERMINATION

Brazilian Journal of Agricultural Sciences / Revista Brasileira de Ciências Agrárias, 2014, Vol 9, Issue 1, p79

1981-1160

Academic Journal

10.5039/agraria.v9i1a2488