A Mechanistic View of Interactions of a Nanoherbicide with Target Organism

Author(s)

Bombo, Aline Bertolosi ^{[1, 2]} ; Santo Pereira, Anderson Espirito ^[3] ; Lusa, Makeli Garibotti ^[4] ; Oliveira, Eliana de Medeiros ^[5] ; de Oliveira, Jhones Luis ^[3] ; Ramos Campos, Estefania Vangelie ^[3] ; de Jesus, Marcelo Bispo ^[6] ; Oliveira, Halley Caixeta ^[7] ; Fraceto, Leonardo Fernandes ^[6] ; Sampaio Mayer, Juliana Lischka ^[2]

Affiliation

^[1] Sao Paulo State Univ UNESP, Inst Biosci, BR-13506900 Rio Claro, SP - Brazil

^[2] Univ Campinas UNICAMP, Inst Biol, Dept Plant Biol, POB 6109, BR-13083970 Campinas, SP - Brazil

^[3] Sao Paulo State Univ UNESP, Inst Sci & Technol, Lab Environm Nanotechnol, BR-18087180 Sorocaba, SP - Brazil

^[4] Fed Univ Santa Catarina UFSC, Dept Bot, BR-88040900 Florianopolis, SC - Brazil

^[5] Fed Univ Santa Catarina UFSC, Cent Lab Eletron Microscopy, LCME, Prorectory Res, BR-88040900 Florianopolis, SC - Brazil

^[6] Univ Campinas UNICAMP, Inst Biol, Nanocell Interact Lab, Dept Biochem & Tissue Biol, POB 6109, BR-13083970 Campinas, SP - Brazil

^[7] Univ Estadual Londrina, Dept Anim & Plant Biol, PR 445, Km 380, BR-86047970 Londrina, PR - Brazil

• Document type: Journal article
• Source: Journal of Agricultural and Food Chemistry; v. 67, n. 16, p. 4453-4462, APR 24 2019.
• Web of Science Citations: 2

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. (AU)

• FAPESP's process: 17/21004-5 - Agriculture, micro/nanotechnology and environment: from evaluation of the mechanisms of action to studies of transport and toxicity
• Grantee: Leonardo Fernandes Fraceto
• Support type: Research Projects - Thematic Grants