Phytochemical content and antioxidant activity in aqueous extracts of Cyclocarya paliurus leaves collected from different populations

PeerJ

article

Mingming Zhou¹  Yuan Lin¹  Shengzuo Fang¹  Yang Liu¹  Xulan Shang¹ 

[1] College of Forestry, Nanjing Forestry University;Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University

关键词: Flavonoid;    Geographical variation;    Water-soluble polysaccharide;    Antioxidant activity;    Polyphenol;    Cyclocarya paliurus;   

DOI  :  10.7717/peerj.6492

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

Cyclocarya paliurus (Batal) Iljinskaja is a multiple function tree species, but its main utilization is for the harvesting of its leaves as materials for tea production and recently as ingredients for the food industry. In this study aqueous extracts of C. paliurus leaves collected from 21 natural populations were evaluated for their phytochemical content and antioxidant activity. The content of water-soluble polysaccharide, total flavonoid and total polyphenol varied from 66.05 to 153.32 mg/g, 9.01 to 19.65 mg/g and 20.80 to 52.69 mg/g, respectively. Quercetin-3-O-glucuronide, aemferol-3-O-glucuronide and 3-O-caffeoylquinic acid were the major phenolic components in aqueous extracts of C. paliurus leaves. Both redundancy analysis and Pearson's correlation analysis indicated that water-soluble polysaccharide, total polyphenol, total flavonoid, quercetin-3-O-glucuronide, 3-O-caffeoylquinic acid and 4-O-caffeoylquinic acid were significantly correlated with antioxidant activity, but total polyphenol showed the greatest contribution to antioxidant capacity. The antioxidant activity of the 21 populations was classified into six distinct groups based on the squared Euclidean distance. These results would provide a theoretical basis for obtaining the greatest yield of targeted antioxidant phytochemicals of C. paliurus leaves for tea and food ingredient production.

【 授权许可】

CC BY