Bacillus thuringiensis protein Vip3Aa does not harm the predator Propylea japonica: A toxicological, histopathological, biochemical and molecular analysis.

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ID: 93132
2020
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Abstract
The ladybeetle Propylea japonica is a widely distributed natural enemy in many agricultural systems. P. japonica is often used as a test organism for safety assessments of transgenic Bacillus thuringiensis crops. Plant varieties expressing the Vip3Aa insecticidal protein are not currently commercially available in China. In this study, protease inhibitor E-64 was used as a positive control to examine the responses of P. japonica larvae to a high concentration of Vip3Aa proteins. Larvae that were fed E-64 had increased mortality and prolonged developmental period, but these parameters were unaffected when larvae were fed Vip3Aa. The epithelial cells of midguts were intact and closely connected with the basal membrane when larvae were fed Vip3Aa, but the epithelial cells degenerated in the E-64 treatment. The activities of antioxidative enzymes and expression levels of detoxification-related genes in P. japonica larvae were not altered after exposure to Vip3Aa; however, these biochemical and molecular parameters were significantly changed in the E-64 treatment. The results demonstrate that Vip3Aa protein is not harmful to the predator P. japonica.
Reference Key
zhao2020bacillusecotoxicology Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Zhao, Yao;Yun, Yueli;Peng, Yu;
Journal Ecotoxicology and environmental safety
Year 2020
DOI
S0147-6513(20)30131-7
URL
Keywords
environmental risk assessment bt protein ladybeetle non-target effects vip3aa

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