Abstract
Tomato and pepper are the main vegetable crops cultivated in Bulgaria. Phytoplasma diseases, mainly stolbur, are important plant diseases for these crops in Bulgaria. The goal of the present paper was to verify association of phytoplasmas with the observed disease symptoms in tomato and pepper and to identify the phytoplasmas detected using RFLP analysis of conserved genes and other uncharacterised phytoplasma chromosomal regions. The presence of phytoplasmas was confirmed in all the samples of tomato and pepper showing typical stolbur symptoms. A phytoplasm sample, which caused severe symptoms, showed the same pattern as the reference strain Mol, while all other phytoplasmic reference strains showed different polymorphisms. RFLP profiles were found useful in distinguishing phytoplasmas in stolbur subgroup (16SrXII-A) in natural plant hosts.
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