Abstract
Sasa quelpaertensis Nakai is a dwarf bamboo grass suitable for food and health-related applications as it is a rich source of antioxidants. In this study, the leaves and culms of this plant were harvested from May to December, and the ethanol extracts of leaves (ESL) and culms (ESC), and the hot water extracts of leaves (HSL) and culms (HSC) were prepared. Extracts were evaluated for the seasonal changes in the content of p-coumaric acid, tricin, total phenolics (TP), and total flavonoids (TF) content; as well as for the antioxidant and anti-inflammatory activities. The p-coumaric acid in HSL and tricin contents in ESL rapidly decreased from June to October, and remained relatively constant until December. TP and TF contents in ESL were gradually increased from October and reached the highest level in December. The phenolic compounds (p-coumaric acid, tricin, TP and TF contents) in ESL showed an excellent correlation with antioxidant activities, indicating that ESL contained the highest levels of antioxidant and anti-inflammatory substances. Taken together, these results suggest that the optimal time to harvest this plant is from October to December.
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