甜菊、秋菊、月见草对光周期反应类型的探讨

甜菊和秋菊都是多年生菊科短日照植物，但是这两种植物的成花对光周期反应类型及光周期诱导条件习性等有所不同，其光周期诱导效果也不同。甜菊成花对光周期反应属花发端要求ＳＤ条件，而花发育要求中日照条件的类型。甜菊对诱导光周期的反应敏感，但对温度要求却不严格。因此，甜菊在１～１０天ＳＤ处理均可提早诱导成花，其中７月中下旬１０天ＳＤ处理的植株诱导成花效果最佳。秋菊成花对光周期反应属于花发端和花发育均要求ＳＤ条件的类型，而且秋菊成花对温度条件的要求严格。秋菊光周期诱导在７月中下旬１５天左右ＳＤ处理，现蕾开花效果最佳。二年生ＬＤＰ月见草成花对光周期反应比对春化作用反应敏感。月见草成花对光周期的反应属于花发端严格要求ＬＤ条件，而花发育要求中日条件。

APPROACHING OF STEVIA REBANDIANA BERTONI, FALL CHRYSANTHEMUM AND COMMON EVENING PRIMROSE ON THE TYPE OF PHOTOPERIOD RESPONSE

Stevia rebandiana Bertoni and fall Chrysanthemum are the short-day plants of perpetual thistle family, but the types of photoperiod response of the formative flowers of these two plants and the conditions of photoperiodical in duction of the formative flouwers of these two plants were different; and their results of the photoperiodical induction were alec different. The photope riod reponse of the formative flowers of stevia rebandiana Bertoni belonged to a kind of type that the point of formative flower required SD and the de velopment of flower required day intermediate. Stevia rebandiana Bcrtoni was sensitive to the reponse of induced photoperiod, but it's not strict with temperature.Hence, Stevia rebandiana Bertoni that had been treated by SD for 1-10 days all could be induced formatine flowers in advance, but stevia rebandiana Bertoni that had been treated by SD for 10 days after the early June were induced formative flowers beet. The photoperiod response of the formative flowers of fall chnysanthemum belonged to another kind of type that the point of formative flower and the development of flower all requined SD,and the formutine flowers of fall chrysanthemum were strict with temperature. Budding and flowering were best if the photoperiodical induct ion of fall chrysanthemum had been treated by SD for about 15 days after the early June.The formative flowers of biennial LDP common evening primrose were more aeonitive to photoperiod response than to vernalization. The photoperiod response of the formative flowers of common evening primrose belonged to another kind of type that the point of formative flower required LD strictly, bu the development of flower required day intermediate.