<i>In planta</i> growth of bacterial pathogen strains was consistent between the homemade growth chamber and a commercial growth chamber.

<p>Wild type (Col) and <i>pad4-1</i> mutant plants of the <i>Arabidopsis thaliana</i> accession Col-0 were inoculated with the <i>Pseudomonas syringae</i> pv. <i>tomato</i> DC3000 (<i>Pto</i>) strain carrying a vector with the effector gene AvrRpt2 (Avr) or the <i>Pto</i> strain carrying the empty vector (EV).The bacterial inoculation dose was 0.0002 OD₆₀₀. The bacterial colony forming units (CFU) were quantified 3 days after inoculation. Four-week old plants were grown at 22°C with a RH of 75% and a 12 hour light/12 hour dark cycle. The experiment was repeated three times in both the commercial and the homemade growth chambers. In each experiment at least 8 biological replicates were made. Bacterial growth results for the two growth chambers were analyzed separately using mixed-effects linear model. The error bars indicate standard errors for the mean values. Bars with different letters are significantly different at <i>p</i> < 0.01.