Fabrication and Characterization of a Novel Herbicide Delivery System with Magnetic Collectability and Its Phytotoxic Effect on Photosystem II of Aquatic Macrophyte

Autor(es)

Forini, Mariana M. L. ^[1] ; Antunes, Debora R. ^[1] ; Cavalcante, Luiz A. F. ^[1] ; Pontes, Montcharles S. ^[2] ; Biscalchim, Erica R. ^[1] ; Sanches, Alex O. ^[1] ; Santiago, Etenaldo F. ^[2] ; Fraceto, Leonardo F. ^[3] ; Grillo, Renato ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ UNESP, Sch Engn, Dept Phys & Chem, BR-15385000 Ilha Solteira, SP - Brazil

^[2] Mato Grosso do Sul State Univ UEMS, Ctr Nat Resources Studies CERNA, Nat Resources Program, BR-79804970 Dourados, MS - Brazil

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

• Tipo de documento: Artigo Científico
• Fonte: Journal of Agricultural and Food Chemistry; v. 68, n. 40, p. 11105-11113, OCT 7 2020.
• Citações Web of Science: 0

Resumo

The use of nano- and microparticles as a release system for agrochemicals has been increasing in agricultural sector. However, the production of eco-friendly and smart carriers that can be easily handled in the environment is still a challenge for this technology. In this context, we have developed a biodegradable release system for the herbicide atrazine with magnetic properties. Herein, we investigated the (a) physicochemical properties of the atrazine-loaded magnetic poly(e-caprolactone) microparticles (MPs:ATZ), (b) in vitro release kinetic profile of the herbicide, and (c) phytotoxicity toward photosynthesis in the aquatic fern Azolla caroliniana. The encapsulation efficiency of the herbicide in the MPs:ATZ was ca. 69%, yielding spherical microparticles with a diameter of ca. 100 mu m, a sustained-release profile, and easily manipulated with an external magnetic field. Also, phytotoxicity issues showed that the MPs:ATZ maintained their herbicidal activity via inhibition of PSII, showing lower toxicity compared with the nonencapsulated ATZ at 0.01 and 0.02 mu mol.L-1. Therefore, this technology may conveniently promote a novel magnetic controlled release of the herbicide ATZ (with the potential to be collected from a watercourse) and act as a nutrient boost to the nontarget plant, with good herbicidal activity and reduced risk to the environment. (AU)

• Processo FAPESP: 17/21004-5 - Agricultura, micro/nanotecnologia e ambiente: da avaliação dos mecanismos de ação a estudos de transporte e toxicidade
• Beneficiário: Leonardo Fernandes Fraceto
• Modalidade de apoio: Auxílio à Pesquisa - Temático