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. and Bacillus sp < em>. were found as the bacteria with highest QQ and biocontrol ability against Pectobacterium. As a results of this study, in the Bacillus Aiia lactonase gene;in p < /em>. chlororaphis three acylase genes of pvdQ، quip < /em> and hacB; in P.putida two acylase genes of pvdQ and quip < /em> and in Acinetobacter one acylase genes were traced. Discussion According to the results of this investigation, Pseudomonas genus was determined as the frequent QQ bacteria. Also, p < /em>. chlororaphis species with the strongest QQ activity, were divided in to two groups; the first isolates with two acylase genes (pvdQ and quip < /em>) and the second isolates containing extra homologous acylase hacB. Isolates of the latter group with the most detected genes involved in QQ, were identified as the best QQ-based biocontrol bacteria against Pectobacterium.]]>
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p. 67−80
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p. 81−95
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