Systemicity and variation in pathogenicity between strains of Xanthomonas campestris pv. magniferaeindicae.
Wachters E. A., Korsten L., Kotzé J. M.
Author Affiliation: Department of Microbiology and Plant Pathology, University of Pretoria, Pretoria 0002, South Africa.
Yearbook - South African Mango Growers' Association 11 : 22-24
Abstract : Lesion development was studied as part of an investigation to determine differences in pathogenicity between strains of X. campestris pv. magniferaeindicae, isolated from black spot lesions collected from 8 different mango cultivars. No difference in pathogenicity was recorded after 2-3 weeks, however, significant differences in severity were seen after 6-8 weeks. The systemic nature of the pathogen was confirmed in stem inoculation studies where X. campestris pv. magniferaeindicae could be re-isolated from above and below the original point of inoculation. Differences in pathogenicity were also investigated at a molecular level by comparing lipopolysaccharide (LPS) profiles from the isolates obtained form 4 different mango producing areas. No difference in LPS profiles was evident between the various X. campestris pv. magniferaeindicae isolates.