Abstract: To explore the general law of dynamic accumulation of the active components in the peel of Trichosanthes kirilowii Maxim.,the contents of adenine,guanine nucleoside and citrulline were investigated during its different growth periods. T.kirilowii peel in Changqing district from the periods of July 3rd 2013 to October 26th 2013 was used as the subjects of analysis.The results indicated that the contents of adenine,guanine nucleoside and citrulline declined at beginning then rose,then declined during the growth periods.When the surface color was slightly yellow,the content of adenine reached the highest 0.1893mg/g;When the surface color basic all yellow,only vascular bundle was green,the content of guanine nucleoside reached the highest 0.4128mg/g,the content of citrulline reached the highest 12.8834 mg/g.In conclusion,the contents of adenine,guanine nucleoside,citrulline in T.kirilowii peel from different growth periods differed significantly.The peel color yellow only vascular bundle green was suggested to be the best picking time for T.kirilowii peel.

Key words: Trichosanthes kirilowii peel, adenine, guanine nucleoside, citrulline, dynamic accumulation