108557 20230519145410.0 doi 10.3390/plants10091876 sideral 125092 ART-2021-125092 eng Sánchez-Hernández, E. Physicochemical characterization and antimicrobial activity against Erwinia amylovora, Erwinia vitivora, and Diplodia seriata of a light purple Hibiscus syriacus L. Cultivar 2021 Access copy available to the general public Unrestricted Phytochemicals are essential raw materials for the production of formulations that can be helpful in crop protection. In particular, Hibiscus spp., which are often used in traditional medicine, are rich in potential bioactive molecules. This study presents an analysis of the thermal, vibrational, and phytochemical characteristics of a light purple variety of Hibiscus syriacus, using thermal gravimetric and differential scanning calorimetry, Fourier-transform infrared spectroscopy, and gas chromatography-mass spectroscopy techniques. Further, with a view to its valorization, the antimicrobial activity of its extracts has been investigated in vitro against Erwinia amylovora (the phytopathogen responsible for fire blight in apples, pears, and some other members of the family Rosaceae), Erwinia vitivora (the causal agent of the “maladie d’Oléron” in grapevines), and Diplodia seriata (responsible for “Bot canker”). Higher heating values and thermal features showed similarities with kenaf biomass. The main compounds identified in the hydro-methanolic extracts were: in flowers, 1-heptacosanol, heptacosane, 1-tetracosanol, hexadecenoic acid, 9,12,15-octadecatrienoic acid, and 9,12-octadecadienoic acid; and in leaves, the coumarin derivative 4,4,6,8-tetramethyl-2-chromanone, vitamin E, phytol, and sitosterol. MIC values of 500 and 375 μg·mL−1 were obtained against E. amylovora for flower and leaf extracts, respectively, upon conjugation with chitosan oligomers (to improve solubility and bioavailability). In the case of E. vitivora, MIC values of 250 and 500 μg·mL−1, respectively, were registered. Regarding the antifungal activity, EC90 values of 975.8 and 603.5 μg·mL−1, respectively, were found. These findings suggest that H. syriacus (cv. ‘Mathilde’) may be a promising source of antimicrobials for agriculture. info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 4.658 2021 PLANT SCIENCES 39 / 240 = 0.162 2021 Q1 T1 0.765 2021 Plant Science 2021 Q1 Ecology, Evolution, Behavior and Systematics 2021 Q1 3.6 2021 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Buzón-Durán, L. Lorenzo-Vidal, B. Martín-Gil, J. Martín Ramos, P Universidad de Zaragoza (orcid)0000-0003-2713-2786 5011 500 Universidad de Zaragoza Dpto. CC.Agrar.y Medio Natural Area Ingeniería Agroforestal 10, 9 (2021), 1876 [16 pp.] Plants 2223-7747 11634323 http://zaguan.unizar.es/record/108557/files/texto_completo.pdf Versión publicada 2777233 http://zaguan.unizar.es/record/108557/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:108557 articulos driver 2023-05-18-13:54:19 ARTICLE