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研究了菊花花芽分化期超微弱发光(UWL),呼吸速率和ATP、可溶性糖、可溶性蛋白含量的变化。结果表明,菊花花芽分化起动期(Ⅱ)与未分化期(Ⅰ)相比,UWL强度增加119.3%,呼吸速率提高102.4%,ATP含量增加148.6%,可溶性糖增加95.5%,可溶性蛋白增加18.3%;在总苞鳞片分化期(Ⅲ)、小花原基分化期(Ⅳ)和花冠形成期(Ⅴ),UWL强度、呼吸速率和ATP含量逐渐下降,可溶性糖在Ⅳ和Ⅴ期下降幅度很大并接近对照水平,可溶性蛋白在Ⅱ、Ⅲ和Ⅳ期保持较高水平,在Ⅴ期下降幅度较大,但仍比对照增加14.0%;而未发生花芽分化的长日照对照的UWL强度、呼吸速率以及ATP、可溶性糖和可溶性蛋白含量基本保持较稳定水平,显示菊花花芽分化期叶片UWL水平与呼吸速率和能量代谢密切相关。
The changes of ultraweak luminescence (UWL), respiration rate, ATP, soluble sugar and soluble protein of flower bud differentiation stage were studied. The results showed that UWL increased 119.3%, respiration rate increased 102.4%, ATP content increased 148.6%, soluble sugar increased 95.5% and soluble protein increased 18.3% compared with undifferentiated stage (Ⅰ) UWL intensity, respiration rate and ATP content of UWL decreased gradually at the stage of total bracts scales differentiation (Ⅲ), primordium differentiation (Ⅳ) and corolla formation stages (Ⅴ), and soluble sugar decreased more in stages Ⅳ and Ⅴ Near the control level, soluble protein maintained high levels in stages II, III and IV, and decreased significantly in stage V but still increased by 14.0% compared with the control. UWL intensity and respiration rate of long-day control without flower bud differentiation The contents of ATP, soluble sugar and soluble protein remained relatively stable, which showed that UWL level in flower bud differentiation stage was closely related to respiration rate and energy metabolism.