FIG. 1.

Susceptibility of E. chrysanthemi strain 3937 to several short-chain organic acids at pH 7.0: ♦, acetic acid; ⋄, benzoic acid; □, butyric acid; ▪, citric acid; ○, formic acid; •, lactic acid; ▵, propionic acid. E. chrysanthemi 3937 at pH 5.5 did not grow at this incubation time. Relative growth is expressed as the percentage of optical density attained by the cultures after 24 h in the presence of the indicated organic acid concentration with respect to the optical density attained in the absence of the organic acid. Results show the means of three replicates. Standard error bars are too small to be represented.