Figure 5
Role of the multidrug efflux pump in Gram-negative bacteria. Susceptibility tests for E. coli, E. amylovora, P. syringae and their respective RND-type multidrug efflux pump mutants to leaf extracts of three Rhododendron species effective against Gram-positive bacteria. WT, wild type. The radius of the inhibition zones was measured in triplicates and values are given as means ± standard deviations.