Molecular and biochemical characterization of Xanthomonas axonopodis pv. citri pathotypes

Abstract

Prevalence of citrus bacterial canker caused by Xanthomonas axonopodis pv. citri in citrus groves is the major impediment and limiting factor in successful citrus production. Severity varies among different species, varieties and prevailing climatic conditions. Despite extensive studies on the biology, epidemiology and management of this disease, there is still little known about the role of different biocontrol agents for management of this disease. Traditional management of X. axonopodis pv citri is brought about by chemicals which have become complicated through the development of chemical resistance, and as such, it is hazardous for health. It is necessary to identify the pathotypes of X. axonopodis pv. citri through biochemical and molecular characterization and to determine the role of different biocontrol agents (antibiotics and plant extracts), in order to find out a safer way for controlling citrus canker as disease severity results in defoliation, dieback, premature fruit drop and blemished fruit that consequently decrease fruit production and market value.

Keywords: Citrus, bacterial canker, Xanthomonas