摘要
Polymerase chain reaction (PCR) approach based on newly designed primers, JYF5/JYR5, wasapplied for specific detection of Xanthomonas axonopodis pv.citri(Xac). The efficiencyand reliability of PCR method were compared with dot immunobinding assay (DIA) andclassical pathogenicity test techniques for detecting suspensions of pure cells of Xacand soaking sap of citrus tissues. Detection sensitivity of PCR was about 4.5 cells or1.56 pg target DNA per reaction which was higher than that of DIA (ca. 450 cells per dot).These three techniques (PCR assay, DIA and Pathogenecity test) could always detect Xacfrom symptomatic citrus samples. Different performances were obtained from citrusmaterials without symptoms, and the positive detection frequency was PCR, DIA andpathogenicity test.
Polymerase chain reaction (PCR) approach based on newly designed primers, JYF5/JYR5, wasapplied for specific detection of Xanthomonas axonopodis pv.citri(Xac). The efficiencyand reliability of PCR method were compared with dot immunobinding assay (DIA) andclassical pathogenicity test techniques for detecting suspensions of pure cells of Xacand soaking sap of citrus tissues. Detection sensitivity of PCR was about 4.5 cells or1.56 pg target DNA per reaction which was higher than that of DIA (ca. 450 cells per dot).These three techniques (PCR assay, DIA and Pathogenecity test) could always detect Xacfrom symptomatic citrus samples. Different performances were obtained from citrusmaterials without symptoms, and the positive detection frequency was PCR, DIA andpathogenicity test.
