Spray-drying microencapsulation of Bacillus megaterium in PVA/cationic starch/zinc oxide for promoting growth and zinc availability in soybean plants.

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dc.contributorFEDERAL UNIVERSITY OF SAO CARLOS
dc.contributorFEDERAL UNIVERSITY OF SAO CARLOS
dc.contributorFEDERAL UNIVERSITY OF SAO CARLOS
dc.contributorUNIVERSITY OF RIBEIRÃO PRETO
dc.contributorUNIVERSITY OF ARARAQUARA (UNIARA)
dc.contributorCHRISTIANE ABREU DE OLIVEIRA PAIVA, CNPMS
dc.contributorCAUE RIBEIRO DE OLIVEIRA, CNPDIA
dc.contributorCRISTIANE SANCHEZ FARINAS, CNPDIA.
dc.creatorLODI, L. A.
dc.creatorBORGES, R.
dc.creatorLOPES, M. M.
dc.creatorGRACIANO, V. A.
dc.creatorBORTOLETTO-SANTOS, R.
dc.creatorBARUD, H. S.
dc.creatorOLIVEIRA-PAIVA, C. A.
dc.creatorRIBEIRO, C.
dc.creatorFARINAS, C. S.
dc.date2025-01-27T12:47:33Z
dc.date2025-01-27T12:47:33Z
dc.date2024-12-03
dc.date2024
dc.date.accessioned2026-07-07T05:27:02Z
dc.descriptionZinc (Zn) is essential for plant development and its deficiency can reduce agricultural productivity. Nutrient solubilizing microorganisms offer a promising solution to enhance the zinc availability for plants. However, directly applying these microorganisms in the field presents challenges such as cell viability loss. Here, we developed a formulation using poly(vinyl alcohol) (PVA), cationic starch (CS), and zinc oxide (ZnO) for microencapsulating Bacillus megaterium via spray drying. Our results showed that B. megaterium effectively solubilizes zinc oxide. The PVACS-ZnO matrix provided a favorable environment for the growth and development of B. megaterium, releasing cells in quantities exceeding initial inoculation (10 log10 CFU/g). Additionally, it protected the cells against adverse field conditions, maintaining bacterial viability after heat (50 °C/48 h), UV light (95% after 180 min), and fungicide/insecticide exposure (99% after 2 h), unlike free bacteria. Accelerated shelf life tests indicated prolonged stability of PVACS-ZnO microspheres, with double the estimated shelf life (14 months) compared to free bacteria (6 months). In greenhouse experiments, the formulation increased aerial and root biomass of soybean plants, and enhanced phosphorus and zinc absorption. These findings indicate that PVASC-ZnO formulations offer a promising strategy for encapsulating microorganisms and enhancing zinc availability, resulting in an effective and environmentally friendly biofertilizer product.
dc.identifierACS Agricultural Science & Technology, v. 4, p. 1271-1283, 2024.
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1169932
dc.identifierhttps://doi.org/10.1021/acsagscitech.4c00476
dc.identifier.urihttp://hdl.handle.net/123456789/491571
dc.languageeng
dc.rightsopenAccess
dc.subjectBacillus
dc.subjectZinc solubilization
dc.subjectCationic starch
dc.subjectBactéria
dc.subjectBiofertilizers
dc.titleSpray-drying microencapsulation of Bacillus megaterium in PVA/cationic starch/zinc oxide for promoting growth and zinc availability in soybean plants.
dc.typeArtigo de periódico

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