Content of Antioxidative Caffeoylquinic Acid Derivatives in Field- Grown Ligularis fischeri (Ledeb.) Turcz and Responses to Sunlight

Title
Content of Antioxidative Caffeoylquinic Acid Derivatives in Field- Grown Ligularis fischeri (Ledeb.) Turcz and Responses to Sunlight
Authors
김상민전제승강석우정유진리린나엄병헌
Keywords
adaptation; caffeoylquinic acid; chlorophylls; Ligularia fischeri; phenolic compound; radical scavenging activity
Issue Date
2012-06
Publisher
Journal of agricultural and food chemistry
Citation
VOL 60, NO 22, 5597-5603
Abstract
Ligularia f ischeri (Ledeb.) Turcz, a commercial leafy vegetable, contains caffeoylquinic acid derivatives (CQAs) as major phenolic constituents. The HPLC chromatograms of leaf extracts collected from different areas in Korea showed a significant variation in CQA amount, and two tri-O-caffeoylquinic acids (triCQAs) were purified and structurally identified by NMR and MS from this plant. Radical scavenging activities among CQAs were found to be increased in proportion to the number of caffeoyl groups. Since this plant prefers damp and shady growth conditions, the effects of sunlight were investigated by growing plantlets in sunlight and shade for four weeks. Greater leaf thickness and higher phenolic contents were found for leaves grown in sunlight than in shade. Four major CQAs-5-mono-O-caffeoylquinic acid (5-monoCQA), and 3,4-, 3,5-, and 4,5-di-Ocaffeoylquinic acid (diCQA)-were induced by solar irradiation, whereas the content of these compounds decreased steadily in shade leaves. The leaves of L. f ischeri clearly showed adaptation responses to sunlight, and these characteristics can be exploited for cultivation of this plant for potential use as a nutraceutical and functional food.
URI
http://pubs.kist.re.kr/handle/201004/42608
ISSN
00218561
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KIST Publication > Article
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