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Rather than using a constitutive promoter to drive transgenes for resistance against fungal and bacterial diseases in genetic engineering of apple (Malus × domestica) cultivars, a promoter induced only after infection was preferred. The ability of the Pgst1 promoter from potato (Solanum tuberosum L.) to drive expression of the gusA reporter gene was determined in two genotypes of apple: the fruit...
The siderophore produced by Erwinia amylovora, the causal agent of fire blight of Maloideae, is one of the virulence factors of this bacterium. The production of siderophores enables E. amylovora to overcome the conditions of iron limitation met in plant tissue, and may also protect the bacteria against active oxygen species produced through the Fenton reaction. In this paper, we have examined the...
Abstract. In order to improve pear resistance against fire blight caused by Erwinia amylovora, a search for promoters driving high-level expression of transgenes specifically in response to this bacterial pathogen has been undertaken. We have examined the ability of hsr203J, str246C and sgd24 tobacco (Nicotiana tabacum L.) promoters to drive expression of the uidA reporter gene in pear. Transgenic...
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