24-epibrassinolide 调节了氧化环素诱导的植物毒性及其解毒机制
Suya Chen1, Shanshan Zhou2, Xuan Xuan1
1College of Environment, Zhejiang University of Technology, Hangzhou 310032, China; Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province, College of Biological and Environmental Engineering, Zhejiang Shuren University, Hangzhou 310015, China.
Ecotoxicology and environmental safety
|January 25, 2025
概括
24-epibrassinolide (EBL) 通过增强抗氧化剂防御和促进排毒,减轻了强菜幼苗中氧化 (OTC) 的毒性. 治疗EBL显著减少了OTC残留物,增强了植物生长和新陈代谢.
科学领域:
- 环境科学 环境科学
- 植物生理学 植物生理学
- 生物化学 生物化学
背景情况:
- 农作物中氧化环素 (OTC) 的污染通过食物链对人类健康构成风险.
- 已知24-epibrassinolide (EBL) 是一种植物激素,可以抵消植物中的污染物毒性.
- 在菜苗中,EBL对OTC的保护作用的具体机制尚不清楚.
研究的目的:
- 调查外源性EBL如何影响暴露于OTC的菜幼苗的生长和新陈代谢.
- 阐明EBL介导的防治OTC毒性的基础分子和生物化学机制.
- 评估EBL在减少植物中的OTC残留物的有效性.
主要方法:
- 强奸苗被用OTC,EBL或两者的组合处理.
- 评估了植物生长参数,活性氧物种 (ROS) 水平和细胞膜完整性.
- 量化了抗氧化酶活性 (GST,GR),二次代谢物水平和OTC残留度.
- 进行了转录组和代谢组分析,以确定关键的调节途径.
主要成果:
- OTC显著抑制了植物生长和新陈代谢,而EBL治疗恢复了这些特征.
- EBL减少了ROS积累和脂质过氧化,增强了植物的抗氧化能力和二次代谢.
- EBL刺激了谷氨S转移酶 (GST) 和谷氨还原酶 (GR) 活动,有助于OTC解毒.
- 在EBL+OTC处理的苗木中,OTC残留物比单独OTC处理的苗木减少了29%.
- 转录组和代谢组数据表明EBL在甲生物合成,谷甲代谢和激素信号通路中的作用.
结论:
- 外源EBL通过增强抗氧化剂防御和二次新陈代谢,有效地减轻了强菜苗的OTC植物毒性.
- EBL通过谷氨途径促进OTC解毒,并显著减少植物中的抗生素残留物.
- EBL影响关键的植物通路,包括烯胺生物合成和激素信号转导,以抵消OTC压力.
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