杭州地区郁金香的鳞茎发育及碳水化合物代谢

在杭州地区连年观察郁金香Tulipa gesneriana自然栽培的生育期，发现4月下旬至5月的高温天气造成郁金香花后的鳞茎膨大期缩短，也是种球出现退化的主要原因。收获球总质量和更新鳞茎的单质量(低于10g)明显降低是郁金香种球退化的主要标志。测定郁金香鳞茎的碳水化合物总量变化表明，盛花期后更新鳞茎中的蔗糖与可溶性糖总量明显增加，叶枯期开始后淀粉迅速积累，尤其是外层鳞片是淀粉的主要贮藏部位。图3表2参6

Bulb development and metabolism of carbohydrates of Tulipa gesneriana in Hangzhou

Through the observation of the open cultivated tulips in Hangzhou for successive years, it was found out that the high temperature between the last ten days of April and May shortened the bulb expanding period, which was a main cause of degeneration of bulb. The distinct decrease in bulb's weight (less than 10 g) of bulb was the major sign of the regeneration of bulb. The changes in the contents of carbohydrates in the bulbs showed that the contents of sucrose and total soluble sugar increased greatly after the blossom. The starch accumulated quickly after the withering of leaves, especially, the outermost scales of daughter bulbs were the main locations for the accumulation of starch.