Abstract
Typical symptoms of corky root were observed on iceberg lettuce (Lactuca sativa) in Queensland, Australia. Slowgrowing bacteria with colonies similar to strains of Rhizomonas suberifaciens or other Rhizomonas species were isolated from lettuce seedlings which had been inoculated with an extract from soil adhering to lettuce roots with corky root symptoms. DNA from all strains was tested for DNA homology with DNA from strain CAI of R. suberifaciens and strain W14 of Rhizomonas sp. Twenty seven strains had moderate (29.2–57.7%) to high (59.9–80.9%) DNA homology with strain CAI and slight (4.8–10.8%) DNA homology with strain WI4. All of these strains induced typical symptoms of corky root on lettuce seedlings, cv. Salinas, and tested positive in an enzyme-linked immunosorbent assay with monoclonal antibody MAb-Rs1 specific for R. suberifaciens. This is the first report of R. suberifaciens causing corky root of lettuce in Australia.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
