İzmir ilinde domates ve biber bitkilerini etkileyen tomato spotted wilt virus (TSWV) ve cucumber mosaic virus (CMV) etmenlerinin moleküler karakterizasyonu

Objective: The objective of this study was to investigate tomato spotted wilt virus (TSWV) and cucumber mosaic virus (CMV) infections in tomato and pepper plants showing virus-induced symptoms in vegetable growing districts of İzmir, Turkey. Material and Methods: Surveys were carried out in tomato and pepper plantations in 2019 and 2021, and the incidences of these viruses in the collected leaf samples were determined by RT-PCR. Nucleotide identities and phylogenetic relationships of the TSWV and CMV isolates with other isolates retrieved from the GenBank database were determined. Results: The results of this study showed that tomato plants were infected at the same rate (21.50%) with TSWV and CMV. Out of the tested pepper samples, 64.15% were infected with TSWV and 25.47% with CMV. The results showed that, the identity rate of nucleoprotein region of TSWV isolates from tomato was 99-96% at nucleotide level while the isolates from pepper showed 100-95% identity. On the other hand, the capsid protein gene region of the tomato isolate of CMV had nucleotide identity rate of 98-95% with other isolates in GenBank, while that of its pepper isolates had 100-98% identity. Also, CMV isolates of this study showed close phylogenetic relationship with the CMV isolates of subgroup IB. Conclusion: This study revealed the prevalence of TSWV and CMV in symptomatic tomato and pepper samples in İzmir province and some molecular properties of them.