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Decrease in catalase activity of Folsomia candida fed a Bt rice diet.

Yiyang Yuan1, Xin Ke, Fajun Chen

  • 1State Key Laboratory of Integrated Management of Pest and Rodents, Institute of Zoology, Chinese Academy of Sciences, 1 Beichen West Road, Chaoyang District, Beijing 100101, China. yuanyy@ioz.ac.cn

Environmental Pollution (Barking, Essex : 1987)
|August 13, 2011
PubMed
Summary
This summary is machine-generated.

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Bt-rice may impact non-target organisms like Folsomia candida. Reproduction and catalase activity were affected, suggesting potential environmental stress in Bt-rice plantations.

Area of Science:

  • Agricultural Entomology
  • Environmental Toxicology
  • Biotechnology

Background:

  • Genetically modified (GM) crops, specifically Bt-rice, are developed for pest resistance.
  • Understanding the ecological impact of Bt-rice on non-target soil invertebrates is crucial.
  • Folsomia candida (Collembola) is a key soil organism sensitive to environmental changes.

Purpose of the Study:

  • To evaluate the effects of three Bt-rice varieties and their non-Bt isolines on Folsomia candida.
  • To assess impacts on survival, reproduction, and antioxidant enzyme activities (superoxide dismutase, catalase, peroxidase).
  • To determine if Bt-rice imposes environmental stress on this non-target organism.

Main Methods:

  • Laboratory bioassays using three Bt-rice varieties and their non-GM near-isogenic counterparts.

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  • Feeding Folsomia candida with different rice varieties.
  • Measuring survival, reproductive output, and activity of superoxide dismutase, catalase, and peroxidase.

    • Main Results:

    • Reproduction of F. candida was significantly reduced when fed Bt-rice varieties Kemingdao and Huahui1 compared to their non-GM isolines.
    • Catalase activity in F. candida was significantly lower when fed the Bt-rice variety Kemingdao versus its non-Bt isoline.
    • Differences in plant composition between rice varieties likely influenced the observed effects.

    Conclusions:

    • Certain Bt-rice varieties can negatively affect the biological traits of Folsomia candida.
    • Reduced catalase activity suggests potential oxidative stress induced by specific Bt-rice varieties.
    • Monitoring antioxidant enzyme activity in non-target organisms is vital for assessing ecological risks of transgenic Bt-rice cultivation.