There was significant variation in the total flavonoid content of the species at the different harvesting stages, and it was in the ranges of 20.79 mg RE/g DW to 60.11 mg RE/g DW, with an increasing trend in total flavonoid content from June to August and subsequently decreasing in September in both.
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Total Flavonoids Extracts of <i>Apocynum</i> L. from the Ili River Valley Region at Different Harvesting Periods and Bioactivity Analysis.
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