تقييم الفعالية ضد الفطرية لعزلات محلية من بكتريا Pseudomonas fluorescens المنتجة للسسايدروفور

Abstract EN

This study was conducted to evaluate the antifungai efficiency of different local isolates of Pseudomonas fluorescens against Rhizoctonia solani and Alternaria alternate andfheir ability to produce siderophores and attempt to isolate these compounds and identifies its amino acids content.

The morphological,cultural and biochemical properties were dependable to isolate and identifie these bacteria from fourty-five soil samples which were collected from various sites in Al-Anbar governorate.

According to the diagnostic features the results showed that 29 of the isolates were Pseudomonas isolates which were obtained from these soil samples were belong to Pseudomonas fluorescens (three of them regarded as biovarl,three isolates as biovarll,seven isolates as biovarlll, two isolates as biovarlV and fourteen as biovar V).Twenty-one of these isolates showed the ability to produce siderophore compounds.

Most of the Pseudomonas fluorescens isolates inhibited the growth of Rhizoctonia solani and Alternaria alternate with the superiority of two of these isolates to completely inhibit the growth of these two fungai isolates on Kings B and PDA media.