Contents of Phenolic, Flavonoid and Antioxidant Activity of Dendrobium spp., in Maejo University, Chiang Mai Province
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Abstract
Flowers of Dendrobium orchids (Dendrobium lindleyi Steud., Dendrobium crumenatum Sw. and Dendrobium aphyllum (Roxb.) Fischer.) from Maejo University were investigated for total contents of phenolic and flavonoid compounds using folin-ciocalteu's reagent and aluminum chloride colorimetric methods. Their antioxidant activity was also performed using 2, 2-dyphenyl-1-picrylhydrazyl (DPPH) scavenging method. The results showed that Dendrobium lindleyi Steud. exhibited the highest total phenolic and flavonoid contents (39.81 mgGAE/g extract and 137.68 mgQE/g extract, respectively) and antioxidant activity
(IC50 = 0.21 mg/mL). There was a strong correlation (r=-0.925) between total phenolic compound content with antioxidant activity and intermediate correlation (r=-0.693) between total flavonoid content with antioxidant activity. The findings suggested that Dendrobium orchids may be a potential source of natural antioxidants especially with Dendrobium lindleyi Steud.
Article Details
บทความ ข้อมูล เนื้อหา รูปภาพ ฯลฯ ที่ได้รับการเผยแพร่ในวารสารวิทยาศาสตร์และเทคโนโลยี มรย. นี้ ถือเป็นลิขสิทธิ์ของวารสารวิทยาศาสตร์และเทคโนโลยี มรย. หากบุคคลหรือหน่วยงานใดต้องการนำทั้งหมดหรือส่วนหนึ่งส่วนใดไปเผยแพร่ต่อหรือกระทำการใดๆ จะต้องได้รับอนุญาตเป็นลายลักษณ์อักษรจากวารสารวิทยาศาสตร์และเทคโนโลยี มรย. ก่อนเท่านั้น
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