TAL-effectors occurrence among Xanthomonas campestris pv. campestris: catch me if you can

Relevance. Xanthomonas campestris pv. campestrisis a widespread bacterial pathogen that causes a black rot disease of Brassicaceae plants. It is distributed across all territories with cultivated brassica crops and has high economic significance. One of the known Xanthomonas pathogenicity factor is TAL-effectors. These proteins penetrate in plant nucleus and change expression of some host genes in order to promote infection. For some Xanthomonas species TAL-effectors are a key of bacteria success, however for Xcc their role is still remain obscure as well as TALE occurrence among Xcc belonged to different races and originated from different regions. The goal of our study was examination of TALE distribution among Xcc isolates collected in Russia.

Methods. Sample of the Xcc isolates mainly collected in Moscow region and Krasnodar krai was used for TALE search. Bacterial total DNA was isolated using CTAB method. Four primer pairs were used for TALE genes detection by amplification conservative regions.

Results. Among 50 isolates only 4 isolates possessed TALE were revealed. Low-frequency occurrence of TALE among Russian isolates can reflect Xcc population features in Moscow region and Krasnodar krai as well as genotype features of cultivated plant hosts.

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