苋菜的生理特性研究 Ⅰ几种栽培苋菜品种的光周期反应

本文对 Amaranthus tricolor(苋)的六个品种—杭州早熟青苋菜、杭州晚熟花苋菜、紫苋菜、花苋菜、杭州花苋菜和上海青苋菜在苗期对光周期的反应进行了初步的研究。实验结果表明:杭州花苋菜和上海青苋菜达到15天苗龄即可以对光周期诱导起反应而开花。杭州早熟青苋菜、杭州晚熟花苋菜和花苋菜则需达22天苗龄。紫苋菜在本实验条件下未开花。上海青苋菜在各种光周期条件下均可开花,但短日照可促进其开花。紫苋菜在实验期间、在各种光周期条件下均不开花。其余四个品种—杭州早熟青苋莱、杭州晚熟花苋菜、杭州花苋菜、花苋菜,表现出定量短日植物的特性,临界光周期分别为12 1/2、13.00、12 1/2、13.00小时;最小诱导周期数分别为4、2、3、3天。

PHOTOPERIODIC RESPONSES OF SIX AMARANT CULTIVARS

Photoperiodic responses of six chinese native culti vars of Am ara- nthus tricolor at seedling stage were studied.it varies greatly in six cultivars.While the red-A.is no response to short-day photoperiodic treatment,Green-A.(Shang-hai)can bear inflorescence primodia u- nder any daylength.However,short day is most effective in inducti- on.The rest four cultivars are quantitative short-day plants with 12. 50,13.00,13.00 and 12.50hr.critical photoperiod and require minimum 4,2,3and3 inductive8-hrphotopcriodic...