Biosynthesis of silver nanoparticles using actinomycetes, phytotoxicity on rice seeds, and potential application in the biocontrol of phytopathogens

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Autor(es): dc.contributorInstituto Butantan-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)-
Autor(es): dc.contributorUniversidade de Lisboa-
Autor(es): dc.creatorZwar, Ingrid P.-
Autor(es): dc.creatorTrotta, Caterina do Valle-
Autor(es): dc.creatorZiotti, Ana B. S.-
Autor(es): dc.creatorLima Neto, Milton-
Autor(es): dc.creatorAraújo, Welington L.-
Autor(es): dc.creatorde Melo, Itamar S.-
Autor(es): dc.creatorOttoni, Cristiane A.-
Autor(es): dc.creatorde Souza, Ana O.-
Data de aceite: dc.date.accessioned2025-08-21T21:53:31Z-
Data de disponibilização: dc.date.available2025-08-21T21:53:31Z-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2022-12-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1002/jobm.202200439-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/246256-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/246256-
Descrição: dc.descriptionTo find effective silver nanoparticles (AgNPs) for control of phytopathogens, in this study, two strains of actinomycetes isolated from the soil of the Brazilian biome Caatinga (Caat5–35) and from mangrove sediment (Canv1–58) were utilized. The strains were identified by using the 16S rRNA gene sequencing as Streptomyces sp., related to Streptomyces mimosus species. The obtained AgNPs were coded as AgNPs 35 and AgNPs58 and characterized by size and morphology using dynamic light scattering, zeta potential, transmission electron microscopy, and Fourier transformed infrared (FTIR). The antifungal activity of the AgNPs35 and AgNPs58 was evaluated in vitro by the minimal inhibitory concentration (MIC) assay on the phytopathogens, Alternaria solani, Alternaria alternata, and Colletotrichum gloeosporioides. The phytotoxic effect was evaluated by the germination rate and seedling growth of rice (Oryza sativa). AgNPs35 and AgNPs58 showed surface plasmon resonance and average sizes of 30 and 60 nm, respectively. Both AgNPs presented spherical shape and the FTIR analysis confirmed the presence of functional groups such as free amines and hydroxyls of biomolecules bounded to the external layer of the nanoparticles. Both AgNPs inhibited the growth of the three phytopathogens tested, and A. alternate was the most sensible (MIC ≤ 4 µM). Moreover, the AgNPs35 and AgNPs58 did not induce phytotoxic effects on the germination and development of rice seedlings. In conclusion, these AgNPs are promising candidates to biocontrol of these phytopathogens without endangering rice plants.-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionDevelopment and Innovation Laboratory Instituto Butantan-
Descrição: dc.descriptionInstitute of Biosciences São Paulo State University (UNESP)-
Descrição: dc.descriptionInstitute of Advanced Sea Studies (IEAMAR) São Paulo State University (UNESP)-
Descrição: dc.descriptionLABMEM Microbiology Department ICB II Universidade de São Paulo (USP)-
Descrição: dc.descriptionEnvironmental Microbiology Laboratory EMBRAPA Meio Ambiente-
Descrição: dc.descriptionLinking Landscape Environment Agriculture and Food (LEAF) Instituto Superior de Agronomia Universidade de Lisboa-
Descrição: dc.descriptionInstitute of Biosciences São Paulo State University (UNESP)-
Descrição: dc.descriptionInstitute of Advanced Sea Studies (IEAMAR) São Paulo State University (UNESP)-
Descrição: dc.descriptionFAPESP: 2010/50186-5-
Descrição: dc.descriptionFAPESP: 2018/04258-6-
Descrição: dc.descriptionFAPESP: 2020/12867-2-
Formato: dc.format64-74-
Idioma: dc.languageen-
Relação: dc.relationJournal of Basic Microbiology-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectactinomycetes-
Palavras-chave: dc.subjectbiocontrol-
Palavras-chave: dc.subjectbiogenic silver nanoparticles-
Palavras-chave: dc.subjectphytotoxicity-
Palavras-chave: dc.subjectrice (Oryza sativa)-
Título: dc.titleBiosynthesis of silver nanoparticles using actinomycetes, phytotoxicity on rice seeds, and potential application in the biocontrol of phytopathogens-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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