Redox-Responsive Nanopesticides Based on Natural Polymers for Environmentally Safe Delivery of Pesticides with Enhanced Foliar Dispersion and Washout Resistance,Journal of Agricultural and Food Chemistry

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Redox-Responsive Nanopesticides Based on Natural Polymers for Environmentally Safe Delivery of Pesticides with Enhanced Foliar Dispersion and Washout Resistance
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2024-09-03 , DOI: 10.1021/acs.jafc.4c05391
Yingjian Ma _{1,

2} , Junyao Li _{1,

2} , Qinshu Yang _{1,

2} , Fengyu Li _{1,

2} , Lei Wang _{1,

2} , Pengkun Yan _{1,

2} , Xinyu Guo _{1,

2} , Rui Zhao _{1,

2} , Yucheng Gu ₃ , Yong Xu _{1,

2} , Xuemin Wu _{1,

2}

Affiliation

Based on the modified cross-linking of the degradable natural polymers chitosan oligosaccharides (COS) and gelatin (GEL) via introduction of a functional bridge 3,3′-dithiodipropionic acid, this study constructed an environmentally responsive dinotefuran (DNF) delivery system (DNF@COS-SS-GEL). The introduction of the disulfide bond (−S–S–) endowed DNF@COS-SS-GEL with redox-responsive properties, allowing for the rapid release of pesticides when stimulated by glutathione (GSH) in the simulated insect. Compared with commercial DNF suspension concentrate (DNF-SC), DNF@COS-SS-GEL showed superior wet spreading and retention performance on cabbage leaves with a reduced contact angle (57°) at 180 s and 4-fold increased retention capacity after rainfall washout. Nanoencapsulation effectively improved the UV-photostability with only a 31.4% decomposition rate of DNF@COS-SS-GEL at 96 h. The small scale and large specific surface area resulted in excellent uptake and transportation properties in plants as well as higher bioactivity against Plutella xylostella larvae. This study will help promote sustainable agricultural development by reducing environmental pollution through improved pesticide utilization.

中文翻译：

基于天然聚合物的氧化还原响应性纳米农药，用于环境安全地输送农药，并增强叶面分散性和耐冲洗性

本研究基于通过引入功能桥3,3'-二硫二丙酸对可降解天然聚合物壳寡糖（COS）和明胶（GEL）进行改性交联，构建了环境响应型呋虫胺（DNF）递送系统（DNF） @COS-SS-GEL）。二硫键 (−S–S–) 的引入赋予了 DNF@COS-SS-GEL 氧化还原响应特性，在模拟昆虫中受到谷胱甘肽 (GSH) 刺激时，可以快速释放农药。与商业 DNF 悬浮剂 (DNF-SC) 相比，DNF@COS-SS-GEL 在甘蓝叶上表现出优异的湿铺展和保留性能，180 秒的接触角 (57°) 减小，降雨后保留能力增加 4 倍冲刷。纳米封装有效提高了 DNF@COS-SS-GEL 的紫外光稳定性，96 小时分解率仅为 31.4%。小规模和大比表面积导致植物具有优异的吸收和运输特性以及对小菜蛾幼虫的较高生物活性。这项研究将通过改善农药的使用来减少环境污染，从而有助于促进可持续农业发展。

更新日期：2024-09-03

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