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Host resistance is a key method for the integrated management of apple scab caused by Venturia inaequalis, which is one of the most important diseases of apple. Artificial inoculation of 92 cider apple cultivars with a mixed inoculum of V. inaequalis identified 19 weakly resistant and 19 resistant cultivars. Twelve of these resistant cultivars were previously classified as having low susceptibility...
The largest plasmid (pPT23A, 100kb) from Pseudomonas syringae pv.tomato PT23, carries the gene cluster for the synthesis of the phytotoxin coronatine and most of its DNA sequences are repeated in a co-residing plasmid, pPT23B (83kb). Some DNA fragments from pPT23A are also repeated elsewhere in the genome. To investigate the role in virulence of these plasmids, avoiding the effects of gene redundancy,...
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