西洋参磷素营养代谢特性研究

利用32 P示踪方法动态地测定了西洋参参株对叶面磷的吸收、分配及代谢过程。结果表明 :不同生育期叶面施磷 ,磷素主要向代谢活性部位分配 ,果期果实是磷素的主要分配中心 ;花期叶面施鳞有利于向根部转移。叶面吸收的32 P迅速参与代谢过程 ,由无机磷合成多种有机磷 ,其中 80 %左右掺入酸溶性组分 ,而且地上部分配高于地下部。

CHARACTERISTICS OF PHOSPHORUS METABOLISM IN Panax quinquefolium linne PLANT

distribution and metabolism of panax quinquefolium linne plant were determined dynamically by using 32 P application on the surface of leaves.The results showed that phosphorus was distributed mainly to active metabolic part of panax quinquefolium linne plant in different growth stages.The fruit was main distribution center in fruit stage.In bloom stage 32 P was easily transported to root.The 32 P absorpted by the surface of leaves went into metabolism quickly and changed from inorganism into many kinds of organic phosphides.About 80 percent of 32 P was in the form of phenol soluble phosphide and 32 P distribution rate was higher in up ground plant than in sub ground plant.