Host adaptation and microbial competition drive Ralstonia solanacearum phylotype I evolution in the Republic of Korea.

ABSTRACT: Bacterial wilt caused by the Ralstonia solanacearum species complex (RSSC) threatens the cultivation of important crops worldwide. We sequenced 30 RSSC phylotype I (R. pseudosolanacearum) strains isolated from pepper (Capsicum annuum) and tomato (Solanum lycopersicum) across the Republic of Korea. These isolates span the diversity of phylotype I, have extensive effector repertoires and are subject to frequent recombination. Recombination hotspots among South Korean phylotype I isolates include multiple predicted contact-dependent inhibition loci, suggesting that microbial competition plays a significant role in Ralstonia evolution. Rapid diversification of secreted effectors presents challenges for the development of disease-resistant plant varieties. We

SUBMITTER: Prokchorchik M 

PROVIDER: S-EPMC7725338 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature