Enhancing Localized Pesticide Action through Plant Foliage by Silver-Cellulose Hybrid Patches
Alonso-Díaz, Alejandro (Centre de Recerca en Agrigenòmica)
Floriach Clark, Jordi (Institut de Ciència de Materials de Barcelona)
Fuentes Lazaro, Judit (Institut de Ciència de Materials de Barcelona)
Capellades, Montserrat (Centre de Recerca en Agrigenòmica)
Sánchez Coll, Núria (Centre de Recerca en Agrigenòmica)
Laromaine, Anna (Institut de Ciència de Materials de Barcelona)

Date:	2019
Abstract:	Efficacy and efficiency of pesticide application in the field through the foliage still face many challenges. There exists a mismatch between the hydrophobic character of the leaf and the active molecule, low dispersion of the pesticides on the leaves' surface, runoff loss, and rolling down of the active molecules to the field, decreasing their efficacy and increasing their accumulation to the soil. We produced bacterial cellulose-silver nanoparticles (BC-AgNPs) hybrid patches by in situ thermal reduction under microwave irradiation in a scalable manner and obtaining AgNPs strongly anchored to the BC. Those hybrids increase the interaction of the pesticide (AgNPs) with the foliage and avoids runoff loss and rolling down of the nanoparticles. The positive antibacterial and antifungal properties were assessed in vitro against the bacteria Escherichia coli and two agro-economically relevant pathogens: the bacterium Pseudomonas syringae and the fungus Botrytis cinerea. We showed in vivo inhibition of the infection in Nicotiana benthamiana and tomato leaves, as proven by the suppression of the expression of defense molecular markers and reactive oxygen species production. The hydrogel-like character of the bacterial cellulose matrix increases the adherence to the foliage of the patches.
Grants:	Ministerio de Economía y Competitividad AGL2016-78002-R Ministerio de Economía y Competitividad RyC-2014-16158 Ministerio de Economía y Competitividad MAT2015-64442-R Ministerio de Economía y Competitividad SEV-2015-0533 Ministerio de Economía y Competitividad SEV-2015-0496 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-765
Rights:	Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Bacterial cellulose ; Silver nanoparticles ; Preventing infection ; Nicotiana benthamiana ; Pseudomonas
Published in:	ACS biomaterials science & engineering, Vol. 5, Issue 2 (February 2019) , p. 413-419, ISSN 2373-9878

DOI: 10.1021/acsbiomaterials.8b01171

Postprint 18 p, 1016.4 KB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > CRAG (Centre for Research in Agricultural Genomics)
Articles > Research articles
Articles > Published articles