Abstract
AbstractAgrobacterium vitis strain E26 is a promising biocontrol agent of grapevine crown gall, an economically important disease of grape worldwide. In this report, we developed a Plating‐PCR method that allows specific detection and quantification of E26 by combining classical microbiological techniques with molecular tools. Random amplified polymorphic DNA fingerprints were used to differentiate E26 from other A. vitis strains. A differentially amplified fragment from E26 was sequenced and characterized as a sequence characterized amplified region (SCAR) marker. Two primer pairs were then designed and evaluated for their specificity against E26. One of the two SCAR primer pairs, 740F/R, was further selected for specific detection of strain E26. A plating assay coupled to PCR with the SCAR primers 740F/R allowed the assessment of population dynamics of E26 in non‐sterile grape rhizosphere soil under controlled conditions.
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