[Study on the optimal harvesting time of Rumex gmelini by analyzing the contents of principal components].
OBJECTIVE
To establish a method used for optimization of harvesting time and determine the best time for harvesting Rumex gmelini.


METHODS
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.


RESULTS
The accumulation of active constituents showed a regular pattern.


CONCLUSIONS
The best harvesting time of R. gmelini is early July.
Cui
Hong-Hua
HH
College of Pharmacy, Heilongjiang University of Traditional Chinese Medicine, Harbin 150040, China.
Wang
Zhen-Yue
ZY
Wang
Zong-Quan
ZQ
Li
Rui-Ming
RM
Kang
Yi-Hua
YH
D000880:Anthraquinones / Q000032:analysis; D004642:Emodin / Q000031:analogs & derivatives / Q000032:analysis*; D005960:Glucosides / Q000032:analysis; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry* / Q000254:growth & development; D025341:Principal Component Analysis / Q000379:methods; D011786:Quality Control; D000077185:Resveratrol; D031804:Rumex / Q000737:chemistry* / Q000254:growth & development; D012621:Seasons; D013267:Stilbenes / Q000032:analysis
D000880:Anthraquinones; D005960:Glucosides; D013267:Stilbenes; C008905:physcione; D004642:Emodin; C027113:chrysophanic acid; D000077185:Resveratrol; C058229:polydatin