Hyacinthus orientalis quality improvement and rapid flowering by applying proper bulb storage temperature

Effect of different temperature treatments on the biochemical compounds and growth parameters of Hyacinthus orientalis cv. Blue jacket bulbs were evaluated under different temperature (5, 10, 15 and 20 °C). After four weeks, biochemical traits such as carbohydrate solution, protein, triglyceride, peroxidase and amylase during storage were measured. After the storage period they were planted in pots and some physiological traits during season growth were examined. Storing at 5 and 10 °C showed the highest carbohydrate solution, protein and triglyceride content and highest enzyme activities were observed in 15 and 20 °C treatments. Moreover, during the growing season the plant treated with 5 and 10 °C showed higher growth rate and earlier flowering time. Overall, according to the results, to achieve high quality and rapid flowering, storage temperature of 5 or 10 °C are recommended in hyacinth bulbs before planting.