多效唑对桂花生长、光合作用及叶绿素荧光的影响

Effect of PP_(333) Treatments on Growth,Photosynthesis and Chlorophyll Fluorescence of Osmanthus fragrans

桂花叶面喷布不同浓度的多效唑(PP333)可显著抑制枝条的伸长生长,促进加粗生长,并使枝条节间缩短,且随着浓度的升高,效果更加明显。PP333能提高叶片早期叶绿素的含量和PSⅡ系统的最大光能转化效率,从而提高叶片的净光合速率。

PP333 that was sprayed on the surface of lives of Osmanthus fiagrans in different concentrations could inhibit the shoot length and accelerate the shoot diameter, meanwhile, shortened the shoot node significantly. All the effects were more remarkably with the increase of the concentrations of PP333. PP333 could improved the net photosynthetic rate by improving the content of chlorophyll during the early period and the efficiency for solar energy utilization of photosystem Ⅱ.