Biotechnology Bulletin ›› 2018, Vol. 34 ›› Issue (6): 115-119.doi: 10.13560/j.cnki.biotech.bull.1985.2018-0054

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Activity Variations of Protective Enzymes in Paracoccus marginatus After Fed Different Cassava Cultivars

WANG Ya-ru1,2 ,LIANG Xiao2 ,WU Chun-ling2 ,CHEN Qing2 ,ZHAO Hui-ping2   

  1. 1. College of Plant Science & Technology,Huazhong Agricultural University,Wuhan 430070;
    2. Environment and Plant Protection Institute,China Academy of Tropical Agricultural Sciences/Key Laboratory of Pests Comprehensive Governance for Tropical Crops,Ministry of Agriculture/Hainan Engineering Research Center for Biological Control of Tropical Crops Diseases and Insect Pests/Key Laboratory for Monitoring and Control of Tropical Agricultural Pests,Haikou 571101
  • Received:2018-01-17 Online:2018-06-26 Published:2018-07-03

Abstract: To explore the mechanism of Paracoccus marginatus selecting host plants,the activity variations of peroxidase(POD),polyphenol oxidase(PPO),catalase(CAT)and superoxide dismutase(SOD)in P. marginatus after fed different cassava cultivars for 48 h were determined by ultraviolet spectrophotometry. The results showed that the enzymes’ activities in adult females fed with cultivar C1115,Swiss F21 and Myanmar were significantly lower than those fed with the control cultivar BRA900(P ﹤0.05),the decreasing range were listed as:41%-43%(POD),60%-63%(PPO),35%-55%(SOD)and 54%-60%(CAT),while those in adult females fed with cultivar SC205 and ZM9066 did not show significant difference. Above results indicate that cassava cultivar C1115,F21 and Myanmar show strong inhibitory effects on the activities of POD,PPO,SOD and CAT in P. marginatus,while BRA900,SC205 and ZM9066 do not show significant inhibitory effects on those protective enzymes,which inclines them to be damaged by P. marginatus.

Key words: Paracoccus marginatus, cassava cultivar, protective enzymes, activity variation