- \n
- Bruno Teixeira de Sousa<\/li>\n
- Bruno Henrique Bortotto da Silva<\/li>\n
- Euler Augusto In\u00eaz<\/li>\n
- Anderson Do Esp\u00edrito Santo Pereira<\/li>\n
- Jhones Luis Oliveira<\/li>\n
- Leonardo Fernandes Fraceto<\/li>\n
- Giliardi Dalazen<\/li>\n
- Halley Caixeta Oliveira<\/li>\n<\/ul>\n
<\/p>\n
<\/p>\n
![\"\"](\"https:\/\/inctnanoagro.com.br\/wp-content\/uploads\/2025\/10\/Leveraging-Nanotechnology-for-Safer-Herbicide-Use-Insights-from-Maize-Tolerance-to-Nanoencapsulated-Atrazine.webp\")
<\/p>\n<\/p>\n
Resumo:<\/b><\/h3>\n
Trabalhos anteriores demonstraram que a nanoencapsula\u00e7\u00e3o da atrazina potencializa a a\u00e7\u00e3o herbicida desse ingrediente ativo. Espera-se que essa atividade aumentada controle as plantas daninhas sem comprometer a toler\u00e2ncia do milho ao herbicida. Este estudo teve como objetivo avaliar a toler\u00e2ncia de plantas de milho \u00e0 atrazina em aplica\u00e7\u00e3o p\u00f3s-emerg\u00eancia com diferentes nanoformula\u00e7\u00f5es.<\/span><\/p>\n
Foram avaliados, em casa de vegeta\u00e7\u00e3o, par\u00e2metros de atividade do fotossistema II (PSII) e de crescimento das plantas de milho ap\u00f3s a aplica\u00e7\u00e3o das formula\u00e7\u00f5es: atrazina convencional (ATZ), atrazina encapsulada em nanoc\u00e1psulas (NCs) de poli(\u03b5-caprolactona) (PCL + ATZ), PCL revestida com quitosana (PCL\/CS + ATZ) e ze\u00edna (ZN + ATZ), nas doses de 1000 e 2000 g de ingrediente ativo (i.a.) ha\u207b\u00b9, al\u00e9m das tr\u00eas formula\u00e7\u00f5es de NCs sem i.a.<\/span><\/p>\n
Marcadores de estresse oxidativo e a atividade de enzimas antioxidantes e de detoxifica\u00e7\u00e3o foram quantificados apenas em plantas tratadas com atrazina, PCL + ATZ, PCL\/CS + ATZ e ZN + ATZ na dose de 2000 g i.a. ha\u207b\u00b9. Todas as nanoformula\u00e7\u00f5es de NCs sem i.a. foram n\u00e3o t\u00f3xicas para a fisiologia e o crescimento das plantas de milho.<\/span><\/p>\n
As plantas tratadas com ATZ apresentaram at\u00e9 39% maior atividade da glutationa S-transferase e menor inibi\u00e7\u00e3o do PSII (em m\u00e9dia 12%) em compara\u00e7\u00e3o ao herbicida nanoencapsulado. Em contraste, PCL + ATZ, PCL\/CS + ATZ e ZN + ATZ induziram maior atividade enzim\u00e1tica antioxidante em rela\u00e7\u00e3o \u00e0 ATZ, com aumentos de 26% na ascorbato peroxidase, 95% na catalase, 120% na peroxidase e 41% na super\u00f3xido dismutase.<\/span><\/p>\n
O efeito sobre a atividade fotossint\u00e9tica foi transit\u00f3rio para todas as formula\u00e7\u00f5es testadas, com recupera\u00e7\u00e3o total observada 14 dias ap\u00f3s a aplica\u00e7\u00e3o. Al\u00e9m disso, ATZ, PCL + ATZ, PCL\/CS + ATZ e ZN + ATZ n\u00e3o comprometeram o crescimento das plantas de milho. Esses resultados indicam que, nas condi\u00e7\u00f5es avaliadas, as plantas de milho mantiveram sua toler\u00e2ncia ao ingrediente ativo aplicado em formula\u00e7\u00e3o nanoencapsulada.<\/span><\/p>\n
<\/p>\n
Abstract:<\/b><\/h3>\n
Previous work has shown that nanoencapsulation of atrazine enhances the herbicidal action of this active ingredient. This increased activity is expected to control weeds and not compromise the tolerance of maize plants to the herbicide. This study aimed to evaluate the tolerance of maize plants to atrazine in postemergence application with different nanoformulations. Parameters of photosystem II (PSII) activity and growth of the maize plants in a greenhouse were evaluated after application of the formulations: conventional atrazine (ATZ), atrazine encapsulated in nanocapsules (NCs) of poly(\u03b5-caprolactone) (PCL + ATZ), PCL coated with chitosan (PCL\/CS + ATZ), and zein (ZN + ATZ), at doses of 1000 and 2000 g active ingredient (a.i.) ha\u20131, in addition to the three NCs formulations without a.i. Oxidative stress markers and the activity of antioxidant and detoxification enzymes were quantified only in plants applied with atrazine, PCL + ATZ, PCL\/CS + ATZ, and ZN + ATZ at a dose of 2000 g a.i. ha\u20131. All NC nanoformulations without a.i. were nontoxic to the physiology and growth of maize plants. Plants treated with ATZ developed up to 39% higher glutathione S-transferase activity and lower inhibition of PSII (on average 12%) compared to the nanoencapsulated herbicide. In contrast, PCL + ATZ, PCL\/CS + ATZ, and ZN + ATZ induced higher antioxidant enzymatic activity in comparison to ATZ, like increases in ascorbate peroxidase (26%), catalase (95%), peroxidase (120%), and superoxide dismutase (41%). The effect on photosynthetic activity was transient for all formulations tested, with total recovery observed 14 days after application. Furthermore, ATZ, PCL + ATZ, PCL\/CS + ATZ, and ZN + ATZ did not compromise maize plant growth. These results indicate that, under the evaluated conditions, maize plants remained tolerant to the active ingredient applied in a nanoencapsulated formulation.<\/span><\/p>\n
<\/p>","protected":false},"excerpt":{"rendered":"
Leveraging Nanotechnology for Safer Herbicide Use: Insights from Maize Tolerance to Nanoencapsulated Atrazine August 20, 2025 https:\/\/pubs.acs.org\/doi\/10.1021\/acsomega.5c04949 Bruno Teixeira de Sousa Bruno Henrique Bortotto da Silva Euler Augusto In\u00eaz Anderson Do Esp\u00edrito Santo Pereira Jhones Luis Oliveira Leonardo Fernandes Fraceto Giliardi Dalazen Halley Caixeta Oliveira Resumo: Trabalhos anteriores demonstraram que a nanoencapsula\u00e7\u00e3o […]<\/p>","protected":false},"author":4,"featured_media":1648,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[36],"tags":[],"class_list":["post-1647","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-publicacoes"],"_links":{"self":[{"href":"https:\/\/inctnanoagro.com.br\/en\/wp-json\/wp\/v2\/posts\/1647","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/inctnanoagro.com.br\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/inctnanoagro.com.br\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/inctnanoagro.com.br\/en\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/inctnanoagro.com.br\/en\/wp-json\/wp\/v2\/comments?post=1647"}],"version-history":[{"count":1,"href":"https:\/\/inctnanoagro.com.br\/en\/wp-json\/wp\/v2\/posts\/1647\/revisions"}],"predecessor-version":[{"id":1649,"href":"https:\/\/inctnanoagro.com.br\/en\/wp-json\/wp\/v2\/posts\/1647\/revisions\/1649"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inctnanoagro.com.br\/en\/wp-json\/wp\/v2\/media\/1648"}],"wp:attachment":[{"href":"https:\/\/inctnanoagro.com.br\/en\/wp-json\/wp\/v2\/media?parent=1647"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inctnanoagro.com.br\/en\/wp-json\/wp\/v2\/categories?post=1647"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inctnanoagro.com.br\/en\/wp-json\/wp\/v2\/tags?post=1647"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}