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[Seasonal dynamics of hyperin content in Acanthopanax senticosus at different habitats].

The study with HPLC technology showed that hyperin only existed in A. senticosus leaf, flower and fruit, and its content was higher in leaf and flower than in fruit. The hyperin content in A. senticosus leaf showed a distinct dynamic change with the rhythm of development. Its content in bud was about 0.013%, which increased gradually with bud development. In mid May, the hyperin content in young leaf reached the maximum (0.087%); while in mid August, it decreased rapidly, with the lowest content about 0.008%. At different habitats, the hyperin content in A. senticosus leaf had different seasonal rhythm, which was low in understory, being at most 0.15%, and high in forest gap and edge, with the contents of 0.42% and 0.65%, respectively. The same trend was found in A. senticosus flower and fruit. There was a significantly negative correlation between leaf area index (LAI) and hyperin content.