Análise dos danos em sementes de barbatimão através de imagens radiográficas

Abstract

Stryphnodendron adstringens Mart. is a native plant of wide distribution in the Brazilian Cerrado, popularly known as barbatimão. The objective of this study was to evaluate the effects of the identified damages by correlating them with the physiological potential. The experiment was conducted in the Laboratory of Seed Analysis, Federal University of Ceará and in the Laboratory of Images Analysis and Seed Analysis in the Department of Crop Science at the “Escola Superior de Agricultura Luiz de Queiroz”, São Paulo University. Colored images of the seeds were taken to analyze the external morphology and X - rays for the internal morphology analysis, maintaining the identification of the seeds for the tests. Subsequently, the seeds were classified into four categories according to the location of the damage, four categories depending on the location of the damage, where category I: consisting of seeds with damage to the upper region, category II: consisting of seeds with damage to the central region, category III: consisting of seeds with damage to the lower region and category IV: composed of seeds with no damage. For the break of dormancy the seeds were mechanically scarified in the region opposite the thread. Then, the germination test was carried out under a constant temperature of 30 ° C in BOD. At 5 days the normal, abnormal and dead seedlings were transferred to blue paper and scanned, capturing colored images of the seedlings in the same sequence used for the seeds in the color and radiographic images. The images of the seeds and the seedlings were analyzed simultaneously to observe the relationship between the type of damage present in the seeds and the type of seedling formed. It was concluded that radiographic images of barbatimão seeds allow the visualization of damage in different regions of the seeds. The damage is related to the physiological potential for this species.