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Invasiveness of Avirulent Strains of Pseudomonas solanacearum in Tomato Cultivars, Resistant or Susceptible to Bacterial Wilt
Author(s) -
Grimault V.,
Prior P.
Publication year - 1994
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/j.1439-0434.1994.tb01461.x
Subject(s) - bacterial wilt , biology , ralstonia solanacearum , virulence , colonization , microbiology and biotechnology , strain (injury) , pseudomonas , mutant , bacteria , cultivar , pseudomonadaceae , limiting , pathogen , botany , gene , genetics , mechanical engineering , anatomy , engineering
Tomato plant colonization by avirulent strains of Pseudomonas solanacearum was studied. The strain 8217R a spontaneous rough mutant was able to penetrate into roots by nature opennings and colonize plants at high levels. The strain 8173, a hrp ‐ engineered fluidal mutant, colonized the plants to a lesser extent than 8217R. There was no difference in colonization observed at taproots and hypocotyls between resistant and susceptible cultivars with the avirulent strains 8217R and 8173, contrary to the plant‐virulent strain interaction. Results indicated that the bacterial spread was limited in the two cultivars regardless of their resistance or susceptibility and suggested the existence of a host defence mechanism, limiting the bacterial spread.