Abstract
Pseudomonas syringae is a widespread and economically important plant pathogen, one found on a number of hosts, including fruit trees, field crops, vegetables, and ornamental plants. This bacterium has been experimentally identified as a parasite of pear, apple, apricot, peach, cherry, sour cherry, plum, and raspberry. The present study was designed to establish differences between strains isolated from fruit trees in Serbia. The pathogenic and biochemical characteristics of isolates were studied. The BOX-PCR method was used to generate genomic fingerprints of Pseudomonas syringae isolates and to identify strains that were previously not distinguishable by other classification methods. Different Bacillus sp. strains were tested for in vitro inhibitory activity against Pseudononas syringae isolates. Bacillus sp. strains show inhibitory activity only against P. syringae isolates that originated from peach. The obtained results demonstrate that the population of the bacterium Pseudomonas syringae from the fruit trees in Serbia is very diverse.
Highlights
The genus Pseudomonas contains Gram-negative bacteria that are asporogenous, rod-shaped, with mono- and peritrichous flagellation, and with respiratory glucose metabolism (Doudoroff and Palleroni, 1984)
On the basis of pathogenicity, the investigated isolates could clearly be divided into two groups: the first group isolated from peach, pear, apple, and raspberry, and the second one from sour cherry and plum
The phytopathogenic bacterium P. syringae is becoming a quite widespread pathogen of fruit trees in Serbia, causing significant economic losses. It was experimentally confirmed as a pathogen on pear, apple, peach, apricot, cherry, sour cherry, and plum trees, as well as raspberry plants (Gavrilović, 2004)
Summary
The genus Pseudomonas contains Gram-negative bacteria that are asporogenous, rod-shaped, with mono- and peritrichous flagellation, and with respiratory glucose metabolism (Doudoroff and Palleroni, 1984). Pseudomonas syringae has emerged as a fruit tree pathogen causing significant economic losses in Serbia This bacterium has been experimentally identified as a parasite of pear, apple, apricot, peach, cherry, sour cherry, plum, and raspberry, causing blossom blast and shoot blight, as well as necrosis of buds, fruits, and branches (Josifović and Šutić, 1964; Arsenijević, 1968, 1970; Radman, 1969; Arsenijević and Balaž, 1986; Arsenijević and Sremac, 1993; Gavrilović, 2004; Gavrilović et al, 2004, 2008, 2009)
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