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Acta Prataculturae Sinica ›› 2020, Vol. 29 ›› Issue (1): 183-192.DOI: 10.11686/cyxb2019128

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Plant secondary metabolites of four rangeland plant species and their effects on the activities of detoxification enzymes of Oedaleus asiaticus in a steppe grassland

CHEN De-xia1, LIU Xu1, LUO Lin-hua1, HUANG Xun-bing1,*, LÜ Shen-jin1, LI Guang-yue1, ZHANG Ze-hua2,3,*   

  1. 1.College of Agriculture and Forestry Science, Linyi University, Linyi 276000, China;
    2.State Key Laboratory of Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China;
    3.Scientific Observation and Experimental Station of Pests in Xilin Gol Rangeland, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Xilinhot 026000, China
  • Received:2019-02-28 Revised:2019-04-11 Online:2020-01-20 Published:2020-01-20
  • Contact: *E-mail: xunbingh@163.com, zhangzehua@caas.cn

Abstract: Oedaleus asiaticus Bey-Bienko, a significant grasshopper pest species occurring in north China, has specific food preferences and adaptations. To explore the identity of the plant metabolites responsible for food preference, we measured the content of flavonoids, phenols, alkaloids, terpenoids, and tannins in the grassland species Stipa krylovii, Cleistogenes squarrosa, Leymus chinensis, and Artemisia frigida. The growth and detoxification enzyme activity of O. asiaticus feeding on the above four plant species with their different secondary metabolite profiles were also analyzed. The grass S. krylovii had low levels of secondary metabolites, while the grass L. chinensis and the herb A. frigida possessed the highest contents of the five measured plant secondary metabolites. Grasshoppers feeding on S. krylovii with low secondary metabolite levels, had greater growth and decreased reactive oxygen species (ROS) concentration and digestive enzyme activity then those feeding on L. chinensis and A. frigida. In summary, S. krylovii was the most favorable host plant among the plants tested, and enhanced the performance of the grasshopper species O. asiaticus. This study shows that grasshopper feeding preference is linked to low levels of secondary metabolites, and this information could aid in grasshopper control.

Key words: grass, grasshopper, plant secondary metabolites, growth, detoxification enzyme