Department of Plant Biology, Institute of Biology , University of Campinas-Unicamp , P.O. Box 6109, Campinas , SP 13083-970 , Brazil.
Laboratory of Environmental Nanotechnology, Institute of Science and Technology , São Paulo State University-UNESP , Sorocaba , SP 18087-180 , Brazil.
J Agric Food Chem. 2019 Apr 24;67(16):4453-4462. doi: 10.1021/acs.jafc.9b00806. Epub 2019 Apr 16.
Atrazine is one of the most used herbicides and has been associated with persistent surface and groundwater contamination, and novel formulations derived from nanotechnology can be a potential solution. We used poly(ε-caprolactone) nanoencapsulation of atrazine (NC+ATZ) to develop a highly effective herbicidal formulation. Detailed structural study of interaction between the formulation and Brassica juncea plants was carried out with evaluation of the foliar uptake of nanoatrazine and structural alterations induced in the leaves. Following postemergent treatment, NC+ATZ adhered to the leaf and penetrated mesophyll tissue mainly through the hydathode regions. NC+ATZ was transported directly through the vascular tissue of the leaves and into the cells where it degraded the chloroplasts resulting in herbicidal activity. Nanocarrier systems, such as the one used in this study, have great potential for agricultural applications in terms of maintenance of herbicidal activity at low concentrations and a substantial increase in the herbicidal efficacy.
莠去津是使用最广泛的除草剂之一，它会导致地表水和地下水的持续污染，而源自纳米技术的新型制剂可能是一种潜在的解决方案。我们使用聚己内酯纳米包封莠去津（NC+ATZ）来开发一种高效的除草剂制剂。通过评估纳米莠去津的叶面吸收和叶片引起的结构变化，对制剂与芸薹属植物之间的相互作用进行了详细的结构研究。在芽后处理后，NC+ATZ 附着在叶片上，并主要通过水孔区域渗透到叶肉组织中。NC+ATZ 通过叶片的维管束组织直接运输，并进入细胞，在细胞中它降解叶绿体，从而产生除草活性。纳米载体系统，如本研究中使用的系统，在低浓度下保持除草活性和显著提高除草效果方面，在农业应用方面具有巨大的潜力。
