菊花花芽分化期超微弱发光及生理代谢的变化

 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%；而长日照处理的对照菊花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。

Changes in UWL Intensity, Respiration Rate and Physiological Metabolism of Chrysanthemum during Floral Differentiation

This studies were carried out to investigate dynamic changes in ultraweak luminescence (UWL) intensity, respiration rate, contents of ATP, soluble sugar and soluble protein of chrysanthemum leaves during floral differentiation. The results showed that the UWL intensity increased 119.3%, respiration rate increased 102.4%, contents of ATP, soluble sugar and soluble protein increased 148.6%, 95.5%, 18.3% respectively at initial stage of floral bud differentiation (II) compared with those of vegetative stage of apical bud (I), and then UWL intensity, respiration rate and contents of ATP reduced slowly respectively at stage of involucre primordial differentiation (III), stage of floret primordial differentiation (IV) and stage of crown form (V). Contents of soluble sugar decreased mostly at stage IV and stage V, and the levels neared to those of controls. Contents of soluble protein maintained higher levels at stage II, stage III, and stage IV, decreased mostly at stage V, but it still increased 14.0% compared with those of controls. But all of UWL intensity, respiration rate, and contents of ATP, soluble sugar and soluble protein maintained stable status in all stages of controls of non-short day treatments. This suggested that the UWL has close relation to respiration and energy metabolism of leaves during differentiation of chrysanthemum.