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[Study on the optimal harvesting time of Rumex gmelini by analyzing the contents of principal components]
Hong-Hua Cui1, Zhen-Yue Wang, Zong-Quan Wang
1College of Pharmacy, Heilongjiang University of Traditional Chinese Medicine, Harbin 150040, China.
Objective:
To establish a method used for optimization of harvesting time and determine the best time for harvesting Rumex gmelini.
Method:
An HPLC method was applied to determinate the contents of seven active constituents(resveratrol, polydatin, chrysophanol 1-glucoside, nepodin, emodin, chrysophanol and physcion)of R. gmelini at different development stage. The result was analyzed by principal component analysis.
Result:
The accumulation of active constituents showed a regular pattern.
Conclusion:
The best harvesting time of R. gmelini is early July.
