The influence of leaf age on methylxanthines, total phenolic content, and free radical scavenging capacity of Ilex paraguariensisaqueous extracts

Revista Brasileira de Farmacognosia

Coelho, Geraldo C.¹  Schenkel, Eloir P.¹  Blum-Silva, Carlos H.¹  Chaves, Vitor C.¹  Universidade Federal da Fronteira Sul, Chapecó, BR¹  Universidade Federal de Santa Catarina, Florianópolis, BR¹  Reginatto, Flávio H.¹ 

关键词: Mate;    Methylxanthines;    Phenolics;    Ageing;    Scavenging;   

DOI  :  10.1016/j.bjp.2015.01.002

来源: Sociedade Brasileira de Farmacognosia

【 摘 要 】

Yerba-mate (Ilex paraguariensis A. St. Hil., Aquifoliaceae) is a South American native species that is widely used for its industrial potential in the preparation of drinks, teas and cosmetics. Its properties are directly related to the presence of its chemical constituents, such as saponins, methylxanthines and phenolic compounds. This study aimed to investigate the influence of leaf age on methylxanthine and total phenolic contents by High Performance Liquid Chromatography and Ultraviolet Spectroscopy, as well as on free radical scavenging capacity, of aqueous extracts of I. paraguariensis leaves. The results showed great variability in all the metabolites measured. Leaf ageing significantly increased the methylxanthine content and total phenolic content of the extracts. Free radical scavenging capacity was also significantly affected (p < 0.05) by leaf age. A positive correlation was observed, between the antioxidant activity and total phenolic content.

【 授权许可】

Unknown