Bakteriyel yumuşak çürüklük hastalığına neden olan Pectobacterium polaris’in konukçu aralığının belirlenmesi

Abstract

Aims: Pectobacterium polaris is a novel species of Pectobacterium taxa, which was reported in different regions of the world and has been recently detected in Turkey. To determine the host range of this novel species, two representative isolates were evaluated for their pathogenicity on plant hosts to know the plants under the risk of the pathogen. Methods and Results: The isolates (NV3 and NV19) belonged to P. polaris, which were previosuly isolated from stem tissue of blackleg showing potato plants collected in Nevşehir province during the vegetation period of 2019, were used for artifical inoculation. Bacterial suspension of both strains were prepared and inoculated into the red cabbage, broccoli, cauliflower, onion, garlic, carrot, tomato, pepper, eggplant, cucumber, squash, melon, watermelon, lettuce, sunflower and sugar beet plants. Appearance of disease symptoms indicated that both strains of P. polaris caused disease in all the plant species inoculated artificially. Viable bacterial colonies which belong to strains on the NA plates were isolated from infected plant tissue by re-isolations. Conclusions: Pectobacterium species are very destructive bacterial plant pathogens that cause soft rot on numerous plant specimen. It has been determined that P. polaris, which is reported in different regions of the world and defined as a fairly new pathogen in our country, is pathogenic in a wide host range. Disease management measures should be undertaken in the region where the pathogen caused infection for the first time, and especially pathogen movement to disease free lands via potato tubers should be prevented. Significance and Impact of the Study: All the defined host types are potential sources for P. polaris. The risk status of these plants, which have economic importance in Turkey has been revealed in this study.