2026-05-05T21:35:33Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/688462025-02-06T11:02:24Zcom_10324_1166com_10324_931com_10324_894col_10324_1338

00925njm 22002777a 4500 dc Sánchez Hernández, Eva author González García, Vicente author Palacio Bielsa, Ana author Casanova Gascón, José author Navas Gracia, Luis Manuel author Martín Gil, Jesús author Martín Ramos, Pablo author 2023 The Euphorbia genus is the third-largest group of blooming plants, features a rich morphological variability, has a near-cosmopolitan distribution, and diverse medicinal uses. Nonetheless, phytochemical information about Euphorbia serrata L. extracts is not available. The objective of this research was to examine the constituents of the hydromethanolic extract of its aerial parts and propose valorization pathways. The results of gas chromatography-mass spectroscopy (GC−MS) demonstrated that 3-methylbutyl formate, quinic acid, N1-(4-hydroxybutyl)-N3-methylguanidine acetate, and 2,3-dihydro-3,5-dihydroxy-6-methyl-4H-pyran-4-one were the main phytocompounds, which have antimicrobial activity. Such activity was assayed against Pseudomonas cichorii, Botrytis cinerea, Fusarium oxysporum, and Sclerotinia sclerotiorum, four of the most destructive diseases of borage (Borago officinalis L.) crops, obtaining minimum inhibitory concentrations (MICs) of 750 and 1000 μg·mL−1 against the bacterium and the three fungal taxa, respectively, in in vitro tests. Conjugation of the extract with chitosan oligomers (COS) enhanced this activity, leading to MIC values of 187.5, 750, 500, and 500 μg·mL−1 for P. cichorii, B. cinerea, F. oxysporum, and S. sclerotiorum, respectively. Additional in vivo assays against two of the pathogens confirmed the protective action of the COS–E. serrata extract conjugate complexes on artificially inoculated plants at a dose of 375 and 1000 μg·mL−1 for P. cichorii and F. oxysporum, respectively. These findings suggest that this plant species can be a rich source of biorationals for prospective use in crop protection. Horticulturae, 2023, Vol. 9, Nº. 6, 652 2311-7524 https://uvadoc.uva.es/handle/10324/68846 10.3390/horticulturae9060652 652 6 Horticulturae 9 2311-7524 Plant Pathology Plantas - Enfermedades y plagas Agriculture Antimicrobial activity Fusarium Phytopathogenic microorganisms Microorganismos fitopatógenos Phytochemicals Plantas - Biotecnología Plants, Protection of Cultivos - Protección Molds (Fungi) Plant science Horticulture Phytochemical constituents and antimicrobial activity of Euphorbia serrata L. Extracts for Borago officinalis L. Crop protection