تشخيص و تعيين پراكندگي گونه هاي باكتري عامل خوشه صمغي در برخي مناطق گندم خيز ايران

During 1996-99 wheat spikes with symptoms of gummy spike blight were collected from several wheat growing provinces of Iran. Kernels were triturated in distilled water and the suspensions were streaked onto plates of yeast extract and sucrose nutrient agar. Yellow-pigmented strains were selected and their phenotypic characteristics and electrophoretic profiles of cell proteins were determined. Results indicated that Rathayibacter iranicus was distributed in East Azarbayejan, Ealam and Kuhkilouyeh and Boyer-Ahmad and R. tritici was prevalent in Golestan, Khuzistan and Sistan and Bluchistan provinces. Both species were present in Isfahan but in separate wheat growing areas. Some heterogeneities in phenotypic features and elect rophoretic profile of cell proteins among R. iranicus strains were observed.