Figure 3: An 860 bp PCR amplified fragment of Pseudomonas viridiflava strains using PVF1/PVR1primers designed for 16S rRNA sequence. From the right side: First lane DNA size marker; second and third lanes a defined P. viridiflava strains and other lanes AH4, AH8, AH11, AH16, AH18, AH23 & AH25 strains isolated from alfalfa plants in Hamedan province(Iran).