Carbohydrate Metabolism Changes in the Growth Process of Planted Lanzhou Lily Bulb after Low Temperature Storage
LI Yun-fei et al(College of Landscape,Beijing Forestry University,Beijing 100083)
[Objective] The objective of research was to provide references of confirming the growth law of bulb.[Method] Lanzhou lily(Lilium davidii var.unicolor Hort.) were planted after low temperature storage(6±0.5 ℃) for 67 and 101 d,the buds were removed when they extended out the apex at 2~3 cm and the carbohydrate metabolism changes in the growth process of bulb were determined at fixed time.[Result] The total soluble sugar content and amylase activity in female bulb and fresh bulb stored at low temperature for 101 d were higher than that of both two bulbs stored for 67 d.Under the two storage time,the starch contents in female bulb and fresh bulb rose continually.The total soluble sugar content rose in female bulb,reduced in fresh bulb stored for 67 d and first rose and then reduced in fresh bulb stored for 101 d.The cane sugar content in female bulb and fresh bulb stored for 67 and 101 d had consistent change trend with that of total soluble sugar content and the amylase activity was all decreased.[Conclusion] The amylase activity in stored bulb was decreased significantly and the starch content was increased.Delaying the storage time was propitious to the forming and accumulation of starch in bulb.