title: Structural and Biochemical Changes in Salicylic-Acid-Treated Date Palm Roots Challenged with Fusarium oxysporum f. sp. albedinis.
abstract: Histochemical and ultrastructural analyses were carried out to assess structural and biochemical changes in date palm roots pretreated with salicylic acid (SA) then inoculated with Fusarium oxysporum f. sp. albedinis (Foa). Flavonoids, induced proteins, and peroxidase activity were revealed in root tissues of SA-treated plants after challenge by Foa. These reactions were closely associated with plant resistance to Foa. Host reactions induced after inoculation of SA-treated plants with Foa included the plugging of intercellular spaces, the deposition of electron-dense materials at the sites of pathogen penetration, and several damages to fungal cells. On the other hand, untreated inoculated plants showed marked cell wall degradation and total cytoplasm disorganization, indicating the protective effects provided by salicylic acid in treated plants.
authors.affiliation: Laboratoire de Biotechnologies, Protection et Valorisation des Ressources Végétales, Faculté des Sciences Semlalia, Université Cadi Ayyad, B.P. 2390, Marrakech 40 001, Morocco.
authors.forename: Abdelhi
authors.initials: A
authors.lastname: Dihazi
authors.forename: Mohammed Amine
authors.initials: MA
authors.lastname: Serghini
authors.forename: Fatima
authors.initials: F
authors.lastname: Jaiti
authors.forename: Fouad
authors.initials: F
authors.lastname: Daayf
authors.forename: Azeddine
authors.initials: A
authors.lastname: Driouich
authors.forename: Hassan
authors.initials: H
authors.lastname: Dihazi
authors.forename: Ismail
authors.initials: I
authors.lastname: El Hadrami