Pepper races 7, 8 and 10 of Xanthomonas axonopodis pv. vesicatoria isolated from diseased pepper plants in Turkey

Pepper races 7, 8 and 10 of Xanthomonas axonopodis pv. vesicatoria isolated from diseased pepper plants in Turkey

2001

A:PS

In the summer of 1999 and 2000, twenty-one strains of Xanthomonas axonopodis pv. vesicatoria [X. vesicatoria] (Xav) isolated from infected pepper plants grown in greenhouses and fields in the Mediterranean and eastern Anatolia regions of Turkey, were characterized based on physiological tests, analysis of whole-cell fatty acids (FAME), indirect enzyme-linked immunosorbent assay, and pathogenicity and hypersensitivity tests. All strains had similar fatty acid profiles and matched the strain to Xav with similarity indices ranging from 0.43 to 0.79. All strains reacted with a set of Xav-specific monoclonal antibodies (MABs) Xv1, 5, 6 and 10, but not with MABs Xv8, 15 and 30 known to react positively with X. vesicatoria and/or X. gardneri (the other taxa besides Xav into which X. campestris pv. vesicatoria has been reclassified). All strains were pathogenic to pepper cv. Marengo plants. Hypersensitivity tests on pepper differential lines including Capsicum pubescens PI 235047, C. annuum cv. Early Calwonder (ECW) and its nearest isogenic lines (designated ECW-10R, ECW-20R and ECW-30R) showed that 8, 2 and 11 of the strains belong to Xav pepper races 7, 8 and 10, respectively. This is the first report of the observation of Xav pepper races 7, 8 and 10 causing bacterial spot disease on pepper in Turkey.

v.50(6):809, PLANT PATHOLOGY

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