Welcome to visit Scientia Silvae Sinicae,Today is

Scientia Silvae Sinicae ›› 2014, Vol. 50 ›› Issue (9): 112-117.doi: 10.11707/j.1001-7488.20140915

Previous Articles     Next Articles

Isolation and Identification of Bioactive Compounds with Antioxidant from Catalpa bungei

Xu Hongyu1, Zhang Xiaoru2, Wang Junhui3, Huang Xiaohua1, Lei Ming2, Dong Juan2, Wei Qin1   

  1. 1. College of Forestry, Northwest A&F University Yangling 712100;
    2. College of Sciences, Northwest A&F University Yangling 712100;
    3. Key Laboratory of Tree Breeding and Cultivation of State Forestry Administration Research Institute of Forestry, CAF Beijing 100091
  • Received:2013-10-11 Revised:2013-11-21 Online:2014-09-25 Published:2014-09-30
  • Contact: 董娟娥

Abstract:

Our previous study found that ethyl acetate extract phase of Catalpa bungei leaves had strong antioxidant activity. In order to further clarify its antioxidant activity, we have searched the components had strong antioxidant ability though silica gel column chromatography combined with DPPH free radical scavenging methods. The antioxidant components were isolated and purified by semi preparative liquid chromatography. With DPPH radical scavenging activity, reducing capacity and ABTS radical scavenging activity ability as investigation index to find the antioxidant components and the physicochemical properties and spectral data were to identify compounds. The results showed that the ethyl acetate extract phase of C.bungei leaves had two compounds: luteolin(1) and apigenin (2). The antioxidant activity of compound 1 was stronger than BHT and compound 2. DPPH radical scavenging activity, reducing power and ABTS radical scavenging activity IC50 values of compound 1 were 23.89, 29.77 and 43.47 μg ·mL-1 respectively. The antioxidant activity of compound 1 was stronger than compound 2 mainly because of its adjacent structure of two phenolic hydroxyl groups in the flavone compound nucleus of B ring. Luteolin and apigenin isolated from C.bungei leaves for the first time.

Key words: Catalpa bungei, antioxidant, luteolin, apigenin

CLC Number: