不同月份白子菜叶片中酚类成分含量的变化  

Change of phenolics content in leaves of Gynura divaricata in different months

作　　者：陈剑[1] 鲜新 吕寒[1] 刘艳[1] 任冰如[1] 李维林[1] CHEN Jian;XIAN Xin;LYU Han;LIU Yan;REN Bingru;LI Weilin(Jiangsu Provincial Service Center for Anti-diabetic Drugs Screening,Institute of Botany,Jiangsu Province and Chinese Academy of Sciences,Nanjing 210014,China)

机构地区：[1]江苏省中国科学院植物研究所(南京中山植物园)江苏省抗糖尿病药物筛选技术服务中心,江苏南京210014

出　　处：《植物资源与环境学报》2021年第5期75-77,共3页Journal of Plant Resources and Environment

基　　金：国家自然科学基金资助项目(31770366)。

摘　　要：白子菜〔Gynura divaricata(Linn.)DC.〕又名白背三七,隶属于菊科(Asteraceae)菊三七属(Gynura Cass.),为多年生草本[1]。白子菜是中国传统中草药,用于治疗咳嗽、疮疡、跌打损伤以及风湿疼痛等[2],在部分地区亦基于其保健作用作为蔬菜栽培。现代药理研究表明:白子菜具有降血压、降血糖、降血脂和治疗糖尿病等功效[3-6]。白子菜中丰富的酚类成分是其主要的生理活性物质,如黄酮类和咖啡酰奎宁酸类等[6-8]。药用植物次生代谢产物含量与气候和季节变化等外部因子密切相关[9]。本研究选择白子菜中含量较高的10个代表性酚类成分,利用高效液相色谱法对同一生长周期4月至11月白子菜叶片中酚类成分含量进行测定,以期为确定白子菜的最佳采收时期提供科学依据。Contents of ten representative phenolics(including six caffeoylquinic acids of neochlorogenic acid,chlorogenic acid,cryptochlorogenic acid,3,4-dicaffeoylquinic acid,3,5-dicaffeoylquinic acid and 4,5-dicaffeoylquinic acid and four flavonoids of rutin,isoquercitrin,nicotiflorin and astragalin)in leaves of Gynura divaricata(Linn.)DC.from April to November were assayed by using HPLC method.The results show that there are evident variations in total contents of caffeoylquinic acids and flavonoids in leaves of G.divaricata in different months,in which,total contents of caffeoylquinic acids and flavonoids both have two peak values in April and August.In the same month,total content of flavonoids is higher than that of caffeoylquinic acids in leaves of G.divaricata.Contents of total phenolics in leaves of G.divaricata are relatively high in April and August,which are 3.3172 and 2.7160 mg·g^(-1)respectively,and are significantly higher than those in other months.Combined with yield,August is considered as the best harvest period of G.divaricata.

关 键 词：白子菜 酚类成分 采收期 

分 类 号：Q946.8[生物学—植物学] S567.239[农业科学—中草药栽培]