Processing Properties and Potency of Bacillus thuringiensis Cry Toxins in the Rice Leaffolder Cnaphalocrocis medinalis (Guenee)

文献类型： 外文期刊

第一作者： Yang, Yajun

作者： Yang, Yajun;Wu, Zhihong;Xu, Hongxing;Lu, Zhongxian;He, Xiaochan

作者机构：

关键词： Cry toxin; midgut extracts; Cnaphalocrocis medinalis; digestion; potency

期刊名称：TOXINS （ 影响因子：4.2； 五年影响因子：4.7 ）

ISSN：

年卷期： 2023 年 15 卷 4 期

页码：

收录情况： SCI

摘要： Different Cry toxins derived from Bacillus thuringiensis (Bt) possess different insecticidal spectra, whereas insects show variations in their susceptibilities to different Cry toxins. Degradation of Cry toxins by insect midgut extracts was involved in the action of toxins. In this study, we explored the processing patterns of different Cry toxins in Cnaphalocrocis medinalis (Lepidoptera: Crambidae) midgut extracts and evaluated the impact of Cry toxins degradation on their potency against C. medinalis to better understand the function of midgut extracts in the action of different Cry toxins. The results indicated that Cry1Ac, Cry1Aa, and Cry1C toxins could be degraded by C. medinalis midgut extracts, and degradation of Cry toxins by midgut extracts differed among time or concentration effects. Bioassays demonstrated that the toxicity of Cry1Ac, Cry1Aa, and Cry1C toxins decreased after digestion by midgut extracts of C. medinalis. Our findings in this study suggested that midgut extracts play an important role in the action of Cry toxins against C. medinalis, and the degradation of Cry toxins by C. medinalis midgut extracts could reduce their toxicities to C. medinalis. They will provide insights into the action of Cry toxins and the application of Cry toxins in C. medinalis management in paddy fields.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序