Biotechnology Bulletin ›› 2021, Vol. 37 ›› Issue (8): 152-161.doi: 10.13560/j.cnki.biotech.bull.1985.2021-0130

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Antioxidant Activity,Antibacterial Activity and Volatile Components of Extracts from the Branches and Leaves of Torreya fargesii Franch.

WANG Xiao-he(), GU Xi-rong(), QI Shun-ju, LI Jie, CUI Yao, LI De-xia, YANG Li-hui   

  1. College of Resources and Environment,Southwest University,Chongqing 400715
  • Received:2021-02-01 Online:2021-08-26 Published:2021-09-10
  • Contact: GU Xi-rong E-mail:swuwxh@qq.com;gxr0956@163.com

Abstract:

Our aims are to explore the antioxidant capacity,bacteriostatic activity,and volatile components of the extracts from the branches and leaves of T. grandis,and to provide scientific basis for the development and utilization of the edible or medicinal value of T. fargesii Franch. The exactions from the branches and leaves of T. fargesii Franch. were conducted by 90% ethanol,antioxidant capacity was determined using free radical scavenging rate,antibacterial activity was analyzed by Oxford Cup Method,and volatile essential components and their relative contents were detected by head sead spacesolid phasemicro extractions and gas chromatography mass spectrometry. First,the extracts from the branches and leaves of T. fargesii Franch. have different degrees of scavenging effects on DPPH,ABTS+,and hydroxyl radicals,among them,the branch extracts of T. fargesii Franch. in Kaizhou district had the highest scavenging rates of DPPH and ABTS+ free radicals,39.9% and 95.3% respectively;the leaf extracts of T. fargesii Franch. in Kaizhou district had the highest scavenging rates of hydroxy radical,reaching 69.8%. Second,the extracts from the branches and leaves of T. fargesii Franch. significantly inhibited the growth and reproduction of Escherichia coli,Bacillus subtilis and Staphylococcus aureus. Among them,the branch extracts of T. fargesii Franch. in Kaizhou district had the strongest inhibitory activity against B. subtilis,with the diameter of inhibition zone reaching 26.9 mm. Third,> 98% of the volatile components from the branches and leaves of T. fargesii Franch. Were terpenes,mainly monoterpenes and sesquiterpenes. In conclusion,the extracts of branches and leaves of T. fargesii Franch. have strong antioxidant and antibacterial activities,the main components of volatile components are monoterpene and sesquiterpene.

Key words: Torreya fargesii Franch., extract, anti-oxidant activity, antibacterial activity, volatile constituent