Plant-Adapted Escherichia coli Show Increased Lettuce Colonizing Ability, Resistance to Oxidative Stress and Chemotactic Response
Figure 6
Chemotactic response of plant-adapted Escherichia coli.
(A–B) Chemotactic response onto TB medium of (A) non-adapted or (B) plant-adapted bacteria. The bar in (A–B) represents 1 cm. (C–D) Chemotactic response towards (C) lettuce leaf blade or (D) lettuce-leaf main vein extracts. K12LB, non-adapted E. coli strain MG1655; K12, plant-adapted E. coli strain MG1655; RP437, non-adapted E. coli strain RP437 (genomic background of reference for chemotactic analysis); and RP9535, non-adapted E. coli strain RP9535 (ΔcheA1643 mutation in a RP437 genomic background). Strains RP437 and RP9535 were used as control of chemotactic and non-chemotactic E. coli K12 bacteria. Results in C–D are statistically different (P≤0.05).