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Induction of PproU-gfp in cells that were grown on 1/2-21C plates containing various levels of PEG 8000. P. agglomerans BRT98(pPProGreen) (□) and P. syringae B728a(pPProGreen) (▵) were grown for 24 h, and the fluorescence intensity of cell suspensions was measured with a fluorometer. The induction ratio was the mean fluorescence of the cells relative to the mean fluorescence of cells grown with 0% PEG 8000. Values represent the mean ± standard error of the mean (n = 3).
