INVESTIGADORES
VOJNOV Adrian Alberto
artículos
Título:
Characterization of a variant of Xanthomonas citri subsp. citri that triggers a host-specific defense response.
Autor/es:
CHIESA M.A; FLORENCIA SICILIANO; ORNELA L.; ROESCHLIN R; FAVARO M.A; DELGADO N.P.; SENDIN, LORENA; I. G. ORCE; PLOPER L.D.; ADRIÁN A. VOJNOV; VACAS J.G.; FILIPPONE M.P.; ATILIO CASTAGNARO; MARÍA ROSA MARANO
Revista:
PHYTOPATHOLOGY
Editorial:
AMER PHYTOPATHOLOGICAL SOC
Referencias:
Año: 2013 vol. 103 p. 555 - 564
ISSN:
0031-949X
Resumen:
Citrus is an economically important fruit crop that is severely afflicted by Asiatic citrus bacterial canker (CBC), a disease caused by the phytopathogen Xanthomonas citri subsp. citri (X. citri). To gain insight into the molecular epidemiology of CBC, 42 Xanthomonas isolates were collected from a range of Citrus spp. across 17 different orchards in Tucumán, Argentina and subjected to molecular, biochemical, and pathogenicity tests. Analysis of genome-specific X. citri markers and DNA polymorphisms based on repetitive elements-based polymerase chain reaction showed that all 42 isolates belonged to X. citri. Interestingly, pathogenicity tests showed that one isolate, which shares >90% genetic similarity to the reference strain X. citri T, has host range specificity. This new variant of X. citri subsp. citri, named X. citri A(T), which is deficient in xanthan production, induces an atypical, noncankerous chlorotic phenotype in Citrus limon and C. paradisi and weak cankerous lesions in C. aurantifolia and C. clementina leaves. In C. limon, suppression of canker development is concomitant with an oxidative burst; xanthan is not implicated in the phenotype induced by this interaction, suggesting that other bacterial factors would be involved in triggering the defense response.