Title: A mechanistic view of interactions of a nanoherbicide with target organism
Author: Bombo, Aline; Mayer, Juliana Lischka Sampaio; Pereira, Anderson Espirito Santo; Lusa, Makeli Garibotti; Oliveira, Eliana Medeiros De; De Oliveira, Jhones Luiz; Campos, Estefania Vangelie Ramos; De Jesus, Marcelo Bispo; Oliveira, Halley Caixeta; Fraceto, Leonardo Fernandes
Is part of: JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, v. 67, p. 1 - 4
Citation: Bombo, Aline; Mayer, Juliana Lischka Sampaio; Pereira, Anderson Espirito Santo; Lusa, Makeli Garibotti; Oliveira, Eliana Medeiros De; De Oliveira, Jhones Luiz; Campos, Estefania Vangelie Ramos; De Jesus, Marcelo Bispo; Oliveira, Halley Caixeta; Fraceto, Leonardo Fernandes; A mechanistic view of interactions of a nanoherbicide with target organism. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, v.67, p. 1-4, 2019
Abstract: 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(epsilon-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.
Funding: We thank Sao Paulo Research Foundation (FAPESP) Thematic Project 2017/21004-5 and the Coordination for the Improvement of Higher Education Personnel (CAPES) for funding and support. We also appreciate the access to equipment and assistance provided by the Electron Microscope Laboratory (LME) and by the National Institute of Science and Technology on Photonics Applied to Cell Biology (INFABIC) at the State University of Campinas; INFABIC is cofunded by sao Paulo Research Foundation (FAPESP) (08/57906-3) and Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) (573913/2008-0). We also thank Qasim Chaudhry for a friendly review.