Research progress on saponins, biological activities of saponins, and quality control of Panax quinquefolium / 中国中药杂志

Panax quinquefolium, as a common precious medicinal plant, has complex chemical components and unique pharmacological activities, which can play a healthcare role in the human body. With the deepening of research, the application of P. quinquefolium has become increasingly extensive. This paper summarized the research progress of the saponins isolated and identified from diffe-rent parts of P. quinquefolium, the structural classification and pharmacological activities of the saponins, and the quality control of Panacis Quinquefolii Radix. Further, this paper put forward the urgent problems to be solved in the development of P. quinquefolium. It is hoped to lay a foundation for the further study and provide reference for the research direction of P. quinquefolium.

Effects of top pruning on fruiting characters of Platycodon grandiflorum / 中国中药杂志

<p><b>OBJECTIVE</b>To investigate the effects of top pruning on fruiting characters of Platycodon grandiflorum, and find the suitable stage, in which seed growth and development furtherly.</p><p><b>METHOD</b>One-year old seedlings were chosen and planted in field. Plant height, branching number, fruit number per plant, 1000 grains weight were measured during growth and development period, respectively.</p><p><b>RESULT</b>The treatment of top pruning postponed in turn the flowering date, lowered the plant heights and the fruit number per plant, increased the branching number and influenced significantly on 1000 grains weights.</p><p><b>CONCLUSION</b>The suitable stage of top pruning for producing seeds was from June 20th to July 5th.</p>