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GFPmut2 expression under the control of the EAfoxR promoter in E. amylovora CFBP1430 strains EAS (EAgfp=A, blue), synthesis mutant EAdfoA (EAdfoAgfp=B, blue), and receptor mutant EAfoxR (EAfoxRgfp=C, blue) reisolated from GD flowers 48 h p.i. on the stigmata. E. amylovora CFBP1430, in red, lacking the reporter construct is the negative control.
