Avaliação da qualidade de sementes sucupira-preta (Bowdichia virgilioides Kunth.) pelo teste de raios X

Abstract

Injuries represent a limitng factor for the seed viability. Depending on their intensity, the injuries might reduce seed vigour, produce weak seedlings. Consequently, they might be more susceptible to adverse conditions. In this research, the efficiency of X ray test was verifie to evaluate damage in seeds of black sucupira and its relation with germination test. Initially, seeds were exposed to different intensities of radiation for different periods. Next, seeds were separated in three categories according to the images obtained in radiographs: seeds without damage, seeds with little damage and seeds with severe damage. The experiment was conducted in factorial system 3x3, corresponding to three lots and three categories of seeds. The variable analyzed were percentage and germination speed index. It was verified that the intensity of 30 Kv per 45 seconds allowed better visualization of damages in seeds of black sucupira. Damages affect wich severely seed germination.