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. 2012 Apr 23;7(4):e35176. doi: 10.1371/journal.pone.0035176

Figure 1. Kinetics of AI-1 and AI-2 activities measured in the supernatant of potato soft-rot.

Figure 1

Pectobacterium atrosepticum (A), Pectobacterium carotovorum (B) and Dickeya spp. (C) using a bioluminescence assay with Escherichia coli DH5α(pSB401) and Vibrio harveyi BB170 reporter strains, respectively. Bacterial growth was monitored by measuring optical density (OD) at 580 nm. For each point, at least 3 independent cultures in PGA minimal medium were analyzed, with standard deviation shown. Legend: white bars, AI-1 activity measurable with the first right Y-axis; black bars, AI-2 activity measurable with the second right Y-axis; RLU, relative luminescence unit.