Four bottlenecks restrict colonization and invasion by the pathogen Ralstonia solanacearum in resistant tomato.

ABSTRACT: Ralstonia solanacearum is a bacterial vascular pathogen causing devastating bacterial wilt. In the field, resistance against this pathogen is quantitative and is available for breeders only in tomato and eggplant. To understand the basis of resistance to R. solanacearum in tomato, we investigated the spatio-temporal dynamics of bacterial colonization using non-invasive live monitoring techniques coupled to grafting of susceptible and resistant varieties. We found four 'bottlenecks' that limit the bacterium in resistant tomato: root colonization, vertical movement from roots to shoots, circular vascular bundle invasion, and radial apoplastic spread in the cortex. Radial invasion of cortical extracellular spaces occurred mostly at late disease stages but was observed throughout plant infecti

SUBMITTER: Planas-Marques M 

PROVIDER: S-EPMC7242079 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature