Análise da coloração de diásporos de Ocimum selloi Benth. (Lamiaceae) como indicativo de maturação

Abstract

In order to better understand the species Ocimum selloi Benth. because of their medical importance, the present study aimed to analyze if the coloring of diaspores is a good indication of maturity parameter to determine the most appropriate time for the harvesting of fruits with high quality seed in relation to the force. The diaspores were separated into three treatments, and T1 diaspores of white (immature), T2 brownish (ripe) and T3 blackened coloratiring (senescent). The diaspores were tested for viability, germination test conducted with 4 replicates of 25 diaspores to each treatment in alternating temperatures 20-30° C with photoperiod of 16 hours. The daily data generated the germination speed index (IVG) from radicle protrusion or percentages of germination and formation of normal plantulas of the total of diaspores which exhibited radicle protrusion in brown color, about 88% develop into normal seedlings while for the diaspores blackened, this ratio drops to about 62%. The speed of germination of diaspores brown and seedling formation proved to be higher than the value found for diaspores blackened. The diaspores picked imaturanente, i.e. White reached significantly lower values on all tests carried out in relation to other points. In short, the aspects analysed indicate brown coloration as an interesting point for collection of achenes aiming the production of seedlings and confirms the use of colour as a visual index that can be used in practice for this species.