2. Materials and methods2.1. Plant

2. Materials and methods
2.1. Plant and fungal materials and inoculation technique
The aggressive (ZAG) F. oxysporum f. sp. albedinis isolate was isolated from naturally-diseased date palm tissues originating from Zagora, Morocco. The aggressiveness of this isolate was previously and regularly tested on seedlings of resistant and susceptible cultivars [16]. Fungal culture was routinely conducted in darkness on Potato Dextrose Agar (PDA) medium at 25