Artículos de revistas
Surface barriers of mandarin cv. 'Okitsu' leaves make a major contribution to canker disease resistance
Fecha
2014-09Registro en:
Favaro, María Alejandra; Micheloud, Norma; Roeschlin, Roxana Andrea; Chiesa, Maria Amalia; Castagnaro, Atilio Pedro; et al.; Surface barriers of mandarin cv. 'Okitsu' leaves make a major contribution to canker disease resistance; American Phytopathological Society; Phytopathology; 104; 9; 9-2014; 970-976
0031-949X
Autor
Favaro, María Alejandra
Micheloud, Norma
Roeschlin, Roxana Andrea
Chiesa, Maria Amalia
Castagnaro, Atilio Pedro
Vojnov, Adrian Alberto
Gmitter, Fred G.
Gadea, José
Rista, Luis Mario
Gariglio, Norberto Francisco
Marano, Maria Rosa
Resumen
Field evaluations have shown that Satsuma mandarin (Citrus unshiu) ‘Okitsu’ is one of the mandarin cultivars that shows substantial resistance to Xanthomonas citri subsp. citri (X. citri), the causal agent of citrus bacterial canker disease. However, the mechanisms underlying this resistance are not well understood. In this study, we have shown that ‘Okitsu’ leaves are nevertheless susceptible to X. citri infection during a period of their development; however, this period is shorter than that seen in the susceptible mandarin ‘Clemenules’ (C. clementina). Under controlled growth conditions, the resistance of ‘Okitsu’ to X. citri was associated with the age of the leaf and was evident in spray-inoculated plants but not in those inoculated by infiltration. Furthermore, X. citri showed reduced attachment and biofilm formation in ‘Okitsu’ leaves compared with ‘Clemenules’. Taken together, our data suggest that structural features of the ‘Okitsu’ leaf surface, such as the physical properties of the cuticle, are involved in the resistance to X. citri.