Cor do tegumento como indicativo da qualidade de sementes de Crotalaria ochroleuca L.

Abstract

Crotalaria ochroleuca L. is a crop that has multiple advantages in terms of soil protection and, like many leguminous species, has heteromorphy in the color of the seed coat, which may be associated with the degree of maturation and serve as an indicator of seed quality. . Thus, this work aimed to evaluate the relationship between seed coat color of Crotalaria ochroleuca L. and physiological potential. For this purpose, seeds belonging to two lots were used: one commercial and one produced on the campus of the Federal Institute of Piauí, showing variability in color. The seeds were classified according to the color of the tegument: red, yellow, green and mixed (containing seeds of the three colors) and then the determination of weight of one thousand seeds, conduction of germination and emergence tests in sand, through which the percentages of the first germination count, total germination, emergence in sand and the index of speed of emergence were evaluated. The results showed that the green and yellow color categories had the highest PMS, having a direct relationship with the highest values of PCG, G and IVE, differing from seeds with red tegument, which presented low physiological potential. Therefore, the seeds of Crotalaria ochroleuca L. can be classified according to the color of the integument, with green and yellow integument seeds having the greatest physiological potential