During 2006–2008, on olive plants (Olea europea) in Nepal, knots (0·5–3 cm in diameter) resembling those caused by Pseudomonas savastanoi pv. savastanoi were observed. Bacterial cells were isolated on nutrient agar medium and the isolates were positive for oxidase, pectinolytic and arginine dihydrolase activity, tobacco hypersensitivity; production of fluorescent pigments and of indole on KB and on MM media, respectively, and negative in the production of levan. Characteristic knot symptoms were observed on artificially inoculated plants within six months after inoculation. Molecular identification was achieved by sequencing the 16S rDNA region. This is the first record of olive knot disease on olive trees (Olea europea) in Nepal.
First report of olive knot caused by Pseudomonas savastanoi pv. savastanoi in Nepal / G. M., Balestra; J. R., Lamichhane; M. B., Kshetri; Mazzaglia, Angelo; L., Varvaro. - In: PLANT PATHOLOGY. - ISSN 0032-0862. - 58:2(2009), pp. 393-393. [10.1111/j.1365-3059.2008.02007.x]
First report of olive knot caused by Pseudomonas savastanoi pv. savastanoi in Nepal
MAZZAGLIA, ANGELO;
2009
Abstract
During 2006–2008, on olive plants (Olea europea) in Nepal, knots (0·5–3 cm in diameter) resembling those caused by Pseudomonas savastanoi pv. savastanoi were observed. Bacterial cells were isolated on nutrient agar medium and the isolates were positive for oxidase, pectinolytic and arginine dihydrolase activity, tobacco hypersensitivity; production of fluorescent pigments and of indole on KB and on MM media, respectively, and negative in the production of levan. Characteristic knot symptoms were observed on artificially inoculated plants within six months after inoculation. Molecular identification was achieved by sequencing the 16S rDNA region. This is the first record of olive knot disease on olive trees (Olea europea) in Nepal.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
