Artículo
A novel, green, low-cost chitosan-starch hydrogel as potential delivery system for plant growth-promoting bacteria
Perez, J.J.; Francois, N.J.; Maroniche, Guillermo Andrés
; Borrajo, María Paula
; Pereyra, M.A.; Creus, Cecilia Mónica
Fecha de publicación:
12/2018
Editorial:
Elsevier
Revista:
Carbohydrate Polymers
ISSN:
0144-8617
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The study examines the use of macrobeads for the controlled-release of bacteria. Macrobeads were prepared by an easy dripping-technique using 20/80 wt/wt chitosan-starch blends and sodium tripolyphosphate as cross-linking agent. The resulting polymeric matrix was examined by SEM, XRD, TGA, and solid-RMN. The swelling-equilibrium, thermal behaviour, crystallinity, and size of macrobeads were affected by the autoclave-sterilization. The diameter of the sterilized xerogel was c.a. 1.6 mm. The results suggested that ionotropic-gelation and neutralization were the mechanisms underlying hydrogel formation. Plant growth-promoting bacteria (PGPB) were loaded into macrobeads separately or co-inoculated. Bacteria loaded macrobeads were dried and stored. Bacteria survived at least 12 months in orders of 109 CFU of A. brasilense/g and 108 CFU of P. fluorescens/g. Bacterial release in sterile saline solution tended to a super Case-II transport mechanism. Polymeric-matrix release efficiently both PGPB in natural soils, which uncovers their potential for the formulation of novel and improved biofertilizers.
Palabras clave:
BIOFERTILIZERS
,
CONTROLLED RELEASE
,
SUSTAINABLE-AGRONOMIC PRACTICES
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Identificadores
Colecciones
Articulos(ITPN)
Articulos de INSTITUTO DE TECNOLOGIA EN POLIMEROS Y NANOTECNOLOGIA
Articulos de INSTITUTO DE TECNOLOGIA EN POLIMEROS Y NANOTECNOLOGIA
Citación
Perez, J.J.; Francois, N.J.; Maroniche, Guillermo Andrés; Borrajo, María Paula; Pereyra, M.A.; et al.; A novel, green, low-cost chitosan-starch hydrogel as potential delivery system for plant growth-promoting bacteria; Elsevier; Carbohydrate Polymers; 202; 12-2018; 409-417
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