Martínez Arias, ClaraSobrino Plata, JuanOrmeño Moncalvillo, Sara MaríaGil, Luis AlfonsoRodríguez Calcerrada, JesusMartín García, Juan Antonio2024-02-052024-02-052020Martínez-Arias, C., et al. «Endophyte Inoculation Enhances Ulmus Minor Resistance to Dutch Elm Disease». Fungal Ecology, vol. 50, abril de 2021, p. 101024. https://doi.org/10.1016/j.funeco.2020.101024.1754-504810.1101/2020.05.04.076349https://hdl.handle.net/20.500.14352/98812This study was funded by the project GENESIS (AGL-2015-66952-R; MINECO/ERDF) and by an agreement for elm conservation between Universidad Politécnica de Madrid and Dirección General de Desarrollo Rural y Política Forestal (MAPA/EAFRD).Certain fungal endophytes improve plant resistance to biotic stresses in forest trees. In this study, three stem fungal endophytes belonging to classes Cystobasidiomycetes, Eurotiomycetes and Dothideomycetes were selected from 210 isolates for their potential as enhancers of Ulmus minor resistance to Ophiostoma novo-ulmi. We evaluated phenotypic traits of these endophytes that could be beneficial for inhibiting O. novo-ulmi in the host plant. Under in vitro conditions, the Dothideomycetous isolate YCB36 strongly inhibited O. novo-ulmi growth, released antipathogenic VOCs, chitinases and siderophores, and overlapped with the pathogen in nutrient utilization patterns. These functional traits could explain the 40% reduction in leaf wilting due to O. novo-ulmi in elm trees pre-inoculated with this endophyte. Ulmus minor trees inoculated with this endophyte showed increased leaf stomatal conductance and higher concentrations of flavonoids and total phenolic compounds in xylem tissues, suggesting induction of defence metabolism.engjournal articlehttps://doi.org/10.1016/j.funeco.2020.101024https://oa.upm.es/78530/https://www.biorxiv.org/content/10.1101/2020.05.04.076349v2.fullrestricted access581.1AntibiosisPhaeosphaeriaceaeElmEndotherapyChaetothyrialesDark septate endophytesBiocontrolDutch elm diseaseResistanceFisiología vegetal (Biología)2417.19 Fisiología Vegetal