title: Chemical Characterization and Anti-Oomycete Activity of Laureliopsis philippianna Essential Oils against Saprolegnia parasitica and S. australis.
abstract: Laureliopsis philippiana (Looser) R. Schodde (Monimiaceae) is a native tree widespread in the forest areas in the south of Chile and Argentina, known for its medicinal properties and excellent wood. The aim of this study was to evaluate the chemical composition of L. philippiana leaf and bark essential oils (EOs) using gas chromatography-mass spectrometry (GC-MS), and to quantify its anti-oomycete activity, specifically against Saprolegnia parasitica and S. australis. Only six components were identified in leaf EO, 96.92% of which are phenylpropanoids and 3.08% are terpenes. As for bark EO, 29 components were identified, representing 67.61% for phenylpropanoids and 32.39% for terpenes. Leaf EO was characterized mainly by safrole (96.92%) and β-phellandrene (1.80%). Bark EO was characterized mainly by isosafrole (30.07%), safrole (24.41%), eucalyptol (13.89%), methyleugenol (7.12%), and eugenol (6.01%). Bark EO has the most promising anti-Saprolegnia activity, with a minimum inhibition concentration (MIC) value of 30.0 µg/mL against mycelia growth and a minimum fungicidal concentration (MFC) value of 50.0 μg/mL against spores; for leaf EO, the MIC and MFC values are 100 and 125 µg/mL, respectively. These findings demonstrate that bark EO has potential to be developed as a remedy for the control of Saprolegnia spp. in aquaculture.
authors.affiliation: Departamento de Química, Facultad de Ciencias Naturales y Exactas, Universidad de Playa Ancha, Avda. Leopoldo Carvallo 270, Playa Ancha, Valparaíso 2340000, Chile. alejandro.madrid@upla.cl.
authors.forename: Alejandro
authors.initials: A
authors.lastname: Madrid
authors.affiliation: Instituto de Microbiología Clínica, Facultad de Medicina, Universidad Austral de Chile, Los Laureles s/n, Isla Teja, Valdivia 5090000, Chile. patricio.godoy@uach.cl.
authors.forename: Patricio
authors.initials: P
authors.lastname: Godoy
authors.affiliation: Instituto de Microbiología Clínica, Facultad de Medicina, Universidad Austral de Chile, Los Laureles s/n, Isla Teja, Valdivia 5090000, Chile. floydkimura@gmail.com.
authors.forename: Sebastián
authors.initials: S
authors.lastname: González
authors.affiliation: Escuela de Tecnología Médica, Facultad de Medicina, Universidad Mayor, Av. Alemania 0281, Temuco 4780000, Chile. lzaror@yahoo.es.
authors.forename: Luis
authors.initials: L
authors.lastname: Zaror
authors.affiliation: Centro de Investigaciones Biomédicas (CIB), Escuela de Medicina, Universidad de Valparaíso, Av. Hontaneda N° 2664, Valparaíso 2340000, Chile. alemoller_diaz@hotmail.com.
authors.forename: Alejandra
authors.initials: A
authors.lastname: Moller
authors.affiliation: Departamento de Ciencias Básicas, Campus Fernando May, Universidad del Bío-Bío, Avda. Andrés Bello s/n casilla 447, Chillán 3780000, Chile. ewerner@ubiobio.cl.
authors.forename: Enrique
authors.initials: E
authors.lastname: Werner
authors.affiliation: Facultad de Farmacia, Escuela de Química y Farmacia, Universidad de Valparaíso, Av. Gran Bretaña N° 1093, Valparaíso 2340000, Chile. mauricio.cuellar@uv.cl.
authors.forename: Mauricio
authors.initials: M
authors.lastname: Cuellar
authors.affiliation: Centro de Investigaciones Biomédicas (CIB), Escuela de Medicina, Universidad de Valparaíso, Av. Hontaneda N° 2664, Valparaíso 2340000, Chile. juan.villena@uv.cl.
authors.forename: Joan
authors.initials: J
authors.lastname: Villena
authors.affiliation: Escuela de Obstetricia y Puericultura, Facultad de Medicina, Universidad de Valparaíso, Blanco N° 1911, Valparaíso 2340000, Chile. ivan.montenegro@uv.cl.
authors.forename: Iván
authors.initials: I
authors.lastname: Montenegro
mesh_terms: D000935:Antifungal Agents / Q000737:chemistry* / Q000494:pharmacology*; D001118:Argentina; D002677:Chile; D000081005:Cyclohexane Monoterpenes; D053138:Cyclohexenes / Q000737:chemistry / Q000494:pharmacology; D008826:Microbial Sensitivity Tests; D039821:Monoterpenes / Q000737:chemistry / Q000494:pharmacology; D025282:Mycelium / Q000187:drug effects; D009822:Oils, Volatile / Q000737:chemistry* / Q000494:pharmacology*; D009868:Oomycetes / Q000187:drug effects*; D024301:Plant Bark / Q000737:chemistry; D018515:Plant Leaves / Q000737:chemistry; D010938:Plant Oils / Q000737:chemistry / Q000494:pharmacology; D044762:Saprolegnia / Q000187:drug effects*; D013729:Terpenes / Q000737:chemistry / Q000494:pharmacology
chemical_list: D000935:Antifungal Agents; D000081005:Cyclohexane Monoterpenes; D053138:Cyclohexenes; D039821:Monoterpenes; D009822:Oils, Volatile; D010938:Plant Oils; D013729:Terpenes; C058582:beta-phellandrene