Avaliação da viabilidade de sementes de Endopleura uchi (Huber) Cuatrec submetidas a tratamento pré-germinativos

Abstract

The objective of this work was to determine the viability of E. uchi seeds previously submitted to pre-germination treatments. The following methods were evaluated: T1- control, T2 - immersion in natural water + topping + sand substrate, T3 - chiseling in four longitudinal lines to the pyrene axis + thermal shock in water at 100°C + sand substrate; T4 – blunting + thermal shock in water at 100°C + sand substrate and cover of the litter substrate, T5 – exposure of the pyrene to the fungus Pycnoporussp + sand substrate and, finally, the T6 pyrene, without processing, exposed to ambient conditions. In addition, there was an evaluation of the degradation of E.uchi pyrenes in relation to mass loss. Finally, the viability of E. uchi pyrenes was evaluated, subjected to 400 ml of 2,3,5 – triphenyl tetrazolium solution at 1% concentration, at 30°C for 3h for staining of living tissues. The results showed that none of the methods used was efficient in the germination of E.uchi during the evaluated period, in addition to contacting that in the degradation evaluation, the greater the mass loss, the more deformed the pyrene is. As for seed viability, it was low, with 9% of viable seeds for T2, 3% for T1 and 3% for T5. Through this, it became evident the need to find an effective pre-germination method for the E. uchi species, which promotes pyrene degradation, preserving the live seed to the point of allowing its germination, a claim that was not achieved in any of the treatments used in this work. .