纳米介孔二氧化硅调控农药在黄瓜植株中吸收运转性能的机制研究

Improving the uptake and transportation performance of pesticides is a main scientific problem that researchers have been trying to study and solve in many years. Nanotechnology application in pesticide loading can change the uptake and transportation behavior of pesticides in plants by controlling the size and distribution of particles, which helps to increase the utilization efficiency of pesticides and reduce the dosage level in the non-target area and the environment. In this study, based on the actual situation of typical disease control in cucumber plants, mesoporous silica nanoparticles (MSNs) in different sizes and distribution will be prepared and carry two model pesticides with different uptake and transportation performance. The effect of size and distribution on the uptake and transportation of pesticide-loading particles in cucumber will be investigated. The micro-mechanism of MSNs regulating the uptake and translocation of systemic and non-systemic pesticides in cucumber plants will be clarified. This study provides the basic theory for optimizing the design of MSNs as carriers of pesticides and opens up a new technical way to improve the uptake and transportation performance of pesticides in plants.

改善农药在植物体内吸收运转性能是提高农药内吸传导活性的有效措施，也是多年来科研工作者着力研究解决的重要科学问题。利用纳米技术，有效负载农药成分，通过载药颗粒粒径、分散度等的调控，改善农药在植物体内的吸收运转性能，可提高农药的有效利用率，降低其在非靶标区域和环境中的投放量。本项目拟基于黄瓜上典型病害防控实际场景，制备粒径尺度和分布不同的纳米介孔二氧化硅载体颗粒，分别对两种内吸性不同的模式农药进行载药，研究粒径尺度和分布等对载药颗粒在黄瓜植株体内吸收运转性能的影响规律，阐明纳米介孔二氧化硅对调控不同内吸性农药在黄瓜植株中吸收运转性能的微观机制。本项研究为优化纳米介孔二氧化硅载药颗粒的设计提供理论基础，为改善农药在植物体内的吸收运转性能开辟新的技术途径。