Author/Authors :
oubraim, s. faculty of science semlalia - unité de chimie biomoléculaire et médicinale, laboratoire de chimie biomoléculaire substances naturelles et réactivité (urac 16), Marrakech, Morocco , oubraim, s. institut national de la recherche agronomique(inra) - laboratory of genetic phytopathology and integrated control, Marrakesh, Morocco , sedra, m.h. institut national de la recherche agronomique(inra) - laboratory of genetic phytopathology and integrated control, Marrakesh, Morocco , lazrek, h. b. faculty of science semlalia - unité de chimie biomoléculaire et médicinale, laboratoire de chimie biomoléculaire substances naturelles et réactivité (urac 16), Marrakech, Morocco
Abstract :
Bayoud disease caused by the soil born pathogen Fusarium oxysporum f.sp. albedinis (Foa) is one of the most destructive disease of date palm in North Africa. Foa produce in the culture filtrate phytotoxins that have been proposed to play an important role in the onset of the disease symptoms. In this study the processes response of date palm cultivars to Foa toxin extract and fusaric acid (FA) was investigated. Using susceptible and resistant cultivars, it was found that dichloromethane extract (DCM) from culture filtrate of Foa and FA showed a dose-response effect. In vitro sensitivity of date palm cultivars to DCM extract (50μg/ml) was positively correlated with susceptibility to bayoud disease in the field. This study suggests that Foa host selective toxin acting as selective agent, contribute to the pathogenesis and could be used on breeding for resistance.
Keywords :
Phytotoxin , Fusarium wilt , Pathogenicity , Fusaric acid , Breeding
