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    Por favor, use este identificador para citar o enlazar este ítem:https://uvadoc.uva.es/handle/10324/62164

    Título
    Lignin–chitosan nanocarriers for the delivery of bioactive natural products against wood-decay phytopathogens
    Autor
    Sánchez Hernández, EvaAutoridad UVA Orcid
    Langa Lomba, Natalia
    González García, Vicente
    Casanova Gascón, José
    Martín Gil, JesúsAutoridad UVA Orcid
    Santiago Aliste, Alberto
    Torres Sánchez, Sergio
    Martín Ramos, PabloAutoridad UVA Orcid
    Año del Documento
    2022
    Editorial
    MDPI
    Descripción
    Producción Científica
    Documento Fuente
    Agronomy, 2022, Vol. 12, Nº. 2, 461
    Resumen
    The use of nanocarriers (NCs), i.e., nanomaterials capable of encapsulating drugs and releasing them selectively, is an emerging field in agriculture. In this study, the synthesis, characterization, and in vitro and in vivo testing of biodegradable NCs loaded with natural bioactive products was investigated for the control of certain phytopathogens responsible for wood degradation. In particular, NCs based on methacrylated lignin and chitosan oligomers, loaded with extracts from Rubia tinctorum, Silybum marianum, Equisetum arvense, and Urtica dioica, were first assayed in vitro against Neofusicoccum parvum, an aggressive fungus that causes cankers and diebacks in numerous woody hosts around the world. The in vitro antimicrobial activity of the most effective treatment was further explored against another fungal pathogen and two bacteria related to trunk diseases: Diplodia seriata, Xylophilus ampelinus, and Pseudomonas syringae pv. syringae, respectively. Subsequently, it was evaluated in field conditions, in which it was applied by endotherapy for the control of grapevine trunk diseases. In the in vitro mycelial growth inhibition tests, the NCs loaded with R. tinctorum resulted in EC90 concentrations of 65.8 and 91.0 μg·mL−1 against N. parvum and D. seriata, respectively. Concerning their antibacterial activity, a minimum inhibitory concentration of 37.5 μg·mL−1 was obtained for this treatment against both phytopathogens. Upon application via endotherapy on 20-year-old grapevines with clear esca and Botryosphaeria decay symptoms, no phytotoxicity effects were observed (according to SPAD and chlorophyll fluorescence measurements) and the sugar content of the grape juice was not affected either. Nonetheless, the treatment led to a noticeable decrease in foliar symptoms as well as a higher yield in the treated arms as compared to the control arms (3177 vs. 1932 g/arm), suggestive of high efficacy. Given the advantages in terms of controlled release and antimicrobial product savings, these biodegradable NCs loaded with natural extracts may deserve further research in large-scale field tests.
    Materias (normalizadas)
    Lignin
    Chitosan
    Nanotechnology
    Plant pathology
    Agriculture
    Grapevine trunk diseases
    Vid - Enfermedades y plagas
    Natural products
    Productos naturales
    Patologia vegetal
    Bioactive compounds
    Compuestos bioactivos
    Wood - Deterioration
    Madera - Deterioro
    Materias Unesco
    3102 Ingeniería Agrícola
    3103 Agronomía
    3103.09 Cultivos de Plantas
    3108 Fitopatología
    ISSN
    2073-4395
    Revisión por pares
    SI
    DOI
    10.3390/agronomy12020461
    Patrocinador
    Junta de Castilla y León y Fondo Europeo de Desarrollo Regional (FEDER) (Ayudas de la Cátedra AgroBank) - (project VA258P18)
    Version del Editor
    https://www.mdpi.com/2073-4395/12/2/461
    Propietario de los Derechos
    © 2022 The Authors
    Idioma
    eng
    URI
    https://uvadoc.uva.es/handle/10324/62164
    Tipo de versión
    info:eu-repo/semantics/publishedVersion
    Derechos
    openAccess
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    • DEP42 - Artículos de revista [291]
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