Structural analysis and aloin determination in leaves of Aloe arborescens at different leaf age / 中草药

Object To explore the content of aloin in the leaves of Aloe arborescens Mill at different leaf age and its difference reason Methods The aloin content was determined by HPLC and anatomical structure of the leaves was studied with semi thin section Results The aloin content declines and the volume of large parenchymatous cell in vascular bundle atrophies from top to bottom with leaf growth in the same plant Conclusion The above results may provide references of the best time for collecting the leaves of A arborescens

Studies on diversity of diosgenin in different part of rhizome of Dioscorea zingiberensis in various growing period / 中草药

ObjectTo study the accumulation and distribution of dioscin in the different part of rhizome of Dioscorea zingiberensis C. H. Wright and the differences of its diosgenin. Methods Histochemistry has been used to study the accumulation and distribution of dioscin in the different part of rhizome and diosgenin was determined by HPLC. Results Dioscin distributed mainly in ground tissue. The amount of dioscin accumulated in the plant part from the region distributed with small vascular bundle (SVB) is the most abundant, and the diosgenin is also the highest in the same region; both of them in the region with no vascular bundle (NVB) are next to that of SVB; the amount of dioscin accumulated in the region distributed with big vascular bundle (BVB) is the lowest, and the diosgenin is the lowest in the same region too. Conclusion Diosgenin in every region of the three of male rhizome is higher than that of female rhizome and diosgenin in every region of the three of monoecism is between those of male and female rhizome.