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Title: Phenolic Compounds and Antioxidant Activity of Phalaenopsis Orchid Hybrids
Authors: Truong, Ngoc Minh
Đỗ, Tấn Khang
Elzaawely, Abdelnaser Abdelghany
La, Hoang Anh
Tran, Dang Xuan
Nguyen, Phu Toan
Nguyen, Thanh Quan
Phung, Thi Tuyen
Pham, Thi Thu Ha
Luong, The Minh
Nguyễn, Văn Quân
Keywords: Phalaenopsis
Phenolic compounds
Antioxidant activity
Moth orchids
Issue Date: 2016
Series/Report no.: Antioxidants;5 .- p.1-12
Abstract: Phalaenopsis spp. is the most commercially and economically important orchid, but their plant parts are often left unused, which has caused environmental problems. To date, reports on phytochemical analyses were most available on endangered and medicinal orchids. The present study was conducted to determine the total phenolics, total flavonoids, and antioxidant activity of ethanol extracts prepared from leaves and roots of six commercial hybrid Phalaenopsis spp. Leaf extracts of “Chian Xen Queen” contained the highest total phenolics with a value of 11.52 ± 0.43 mg gallic acid equivalent per g dry weight and the highest total flavonoids (4.98±0.27mgrutin equivalent per g dry weight). The antioxidant activity of root extracts evaluated by DPPH (2,2-diphenyl-1-picrylhydrazyl) free radical scavenging assay and β-carotene bleaching method was higher than those of the leaf extracts. Eleven phenolic compounds were identified, namely, protocatechuic acid, p-hydroxybenzoic acid, vanillic acid, caffeic acid, syringic acid, vanillin, ferulic acid, sinapic acid, p-coumaric acid, benzoic acid, and ellagic acid. Ferulic, p-coumaric and sinapic acids were concentrated largely in the roots. The results suggested that the root extracts from hybrid Phalaenopsis spp. could be a potential source of natural antioxidants. This study also helps to reduce the amount of this orchid waste in industrial production, as its roots can be exploited for pharmaceutical purposes.
Appears in Collections:Tạp chí quốc tế

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