L-氨基酸调节生物膜的形成,抗紫外线和Bacillus thuringiensis配方中的杀虫活性:机制和优化
Zixuan Wang1, Yimeng Zhang1, Junjun Chen1
1State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & Key Laboratory of biopesticides and Chemical Biology (Ministry of Education) & Biopesticide Research Center, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, PR China.
Pesticide biochemistry and physiology
|December 1, 2025
概括
这项研究揭示了氨基酸如何增强Bacillus thuringiensis (Bt) 生物杀虫剂. 特定的氨基酸提高了田间持久性,抗紫外线和杀虫活性,从而导致更有效的害虫控制.
科学领域:
- 农业科学 农业科学
- 微生物学 微生物学
- 生物技术是生物技术.
背景情况:
- 生物杀虫剂Bacillus thuringiensis (Bt) 对于可持续的害虫管理至关重要.
- 提高Bt生物农药的现场持久性和有效性是一个关键的挑战.
- 了解配方组件的作用对于优化Bt性能至关重要.
研究的目的:
- 系统地研究所有20种L-氨基酸对Bt生物膜形成,紫外线抵抗和杀虫活性的影响.
- 确定最佳的氨基酸组合,以提高Bt生物杀虫剂的稳定性和有效性.
- 阐明氨基酸介导的Bt疗效增强背后的分子和生理机制.
主要方法:
- 对20种L-氨基酸对Bt生物膜形成和稳定性的影响进行选.
- 使用Plackett-Burman设计和响应表面方法的统计优化.
- 使用传输电子显微镜评估抗紫外线,杀虫活性 (LC50) 和中肠病理.
主要成果:
- 非极性氨基酸 (例如,L-氨酸) 通过疏水粘附增加了生物膜生物质.
- 基本氨基酸 (例如,L-氨酸,L-氨酸) 通过静电稳定增强了悬浮的稳定性.
- 一种协同配制的L-氨酸,L-氨酸和L-氨酸增加了生物膜产量 (3.8倍),紫外线存活率 (约. 50%) 和杀虫剂效力 (8.12倍的LC50降低).
结论:
- 氨基酸作为界面调节剂,显著增强Bt生物杀虫剂的特性.
- 协同氨基酸配方为下一代稳定和强大的Bt生物农药提供了一个有前途的战略.
- 这些发现提供了分子生理学证据,将氨基酸相互作用与目标害虫的增强疗效和中肠干扰联系起来.
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