Extracellular polysaccharide is required for wild-type virulence of Pseudomonas solanacearum.

摘要: Several Pseudomonas solanacearum strains which produced no detectable extracellular polysaccharide (EPS) in planta had been reported to remain highly virulent when tested at high inoculum concentrations (P. Xu, M. Iwata, S. Leong, and L. Sequeira, J. Bacteriol. 172:3946-3951, 1990; P. 170:617-622, 1988). Two of these mutants, KD700 KD710, have now molecularly genetically mapped the EPSI gene cluster described by Denny Baek (Mol. Plant-Microbe Interact. 4:198-206, 1991). When a range was used, two mutants all other EPS-defective were found be reduced virulence eggplants tobacco relative wild-type strain. Thus, EPS consistently is required for level solanacearum. Images