菊科植物青蒿(Anemisia annua L.)在16小时光周期下生长55天后,切下无性系,转移到温室中进行6种光周期的处理。在短的光周期(8,10或12小时)条件下,2周后植物开花;在长的光周期(16,20或24小时)条件下,植物在10周的处理停止之前一直保持生长状态。当植物生长在长的光周期条件后,处理转化成8小时的光周期,花期保持2周 The Artemisia annua (Anemisia annua L.) was grown for 55 days under a 16-hour photoperiod, and the clones were cut off and transferred to a greenhouse for six photoperiod treatments. Plants flower after 2 weeks under short photoperiod (8, 10 or 12 hours); plants remain growing until 10 weeks of treatment under conditions of long photoperiod (16, 20 or 24 hours) . When the plants are grown under long photoperiod conditions, the treatment is converted into an 8-hour photoperiod and the flowering period is maintained for 2 weeks