Figure 1.

Abundance and diversity of N-acyl homoserine Lactone molecules produced by Pectobacterium and Dickeya strains.

NAHSLs were extracted from PGA medium culture supernatants of reference strains (a) and recent strains isolated from fields (b) during the transition from exponential to stationary phases. On-line liquid chromatography mass spectrometry was used to identify and quantify N-hexanoyl-l-homoserine lactone (slashed white bar), N-octanoyl-l-homoserine lactone (slashed gray bar), N-3-oxo-hexanoyl-l-homoserine lactone (white bar), N-3-oxo-l-octanoyl-homoserine lactone (gray bar) and N-3-oxo-decanoyl-l-homoserine lactone (black bar). Values are the average of three independent experiments.