Interaction between a nano-formulation of atrazine and rhizosphere bacterial communities: atrazine degradation and bacterial community alterations

Autor(es)

Zhai, Yujia ^[1] ; Abdolahpur Monikh, Fazel ^[1] ; Wu, Juan ^[1] ; Grillo, Renato ^[2] ; Arenas-Lago, Daniel ^[3] ; Darbha, Gopala Krishna ^[4] ; Vijver, Martina G. ^[1] ; Peijnenburg, Willie J. G. M. ^{[1, 5]}

Afiliação do(s) autor(es)

^[1] Leiden Univ, Inst Environm Sci CML, POB 9518, NL-2300 RA Leiden - Netherlands

^[2] Sao Paulo State Univ UNESP, Sch Engn, Dept Chem & Phys, BR-15385000 Ilha Solteira, SP - Brazil

^[3] Univ Vigo, Dept Plant Biol & Soil Sci, Vigo 36310 - Spain

^[4] Indian Inst Sci Educ & Res Kolkata, Dept Earth Sci, Environm Nanosci Lab, Mohanpur 741246, W Bengal - India

^[5] Natl Inst Publ Hlth & Environm RIVM, POB 1, Bilthoven - Netherlands

• Tipo de documento: Artigo Científico
• Fonte: ENVIRONMENTAL SCIENCE-NANO; v. 7, n. 11, p. 3372-3384, NOV 1 2020.
• Citações Web of Science: 0

Resumo

Nanotechnology can potentially revolutionize the agricultural industry by offering nano-formulations of pesticides, the so-called nano-pesticides, which can e.g. increase the efficacy and stability of the active ingredients of pesticides. However, it is unknown how a nano-formulation may modulate the interaction between the active ingredient and non-target soil (micro)organisms. Here, we show that long-term exposure to a high dosage of atrazine (ATZ) containing nano-pesticides (NPATZs), where ATZ is encapsulated in a biodegradable polymeric shell, significantly decreases the metabolic capacity of rhizosphere bacterial communities and alters their community structure and composition compared to rhizosphere bacterial communities exposed to the same amount of conventionally applied ATZ. In the rhizosphere, the NPATZs and ATZ were found to be initially degraded by Mycobacterium and Pseudomonas bacteria. As the exposure time increased, more bacterial consortia became involved in NPATZ degradation than in ATZ degradation, especially in metabolizing N-isopropylammelide to carboxybiuret catalyzed by the genes atzC and atzD. Our findings provide important insights into the time-resolved interactions between rhizosphere bacterial communities and nano-pesticides. (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