Germinação e armazenamento de sementes de coca (Erythroxylum ligustrinum DC. - Erythroxylaceae)

Abstract

The objective this work was to evaluate the effect of the temperature on seeds storage and germination of the Erythroxylum ligustrinum DC. To develop this research, seeds ware placed in plastic boxes contained wetted paper with nistatina (0.2%) and kept at 5, 10, 15, 20, 25, 30, 35, 40 and 45°C, during the photoperiod of 12 hours. In the storage, seeds were placed in paper bags and kept to ambient and refrigerator temperature. Monthly, the seeds germination were evaluated. The minimum temperature, ideal germination temperature and maximum temperature range for coca seeds were between 10 and 15°C, 25 and 30°C and 40 and 45°C, respectively. The coca seeds storage for long time was impracticable in paper bag at (10°C ± 2) refrigerator and (27°C ± 5) ambient temperature.