A: Temperature affects neuronal expression of GFP driven by the
unc-33 promoter. Representative confocal micrographs of the head region of C. elegans nematodes grown on OP50 at either 16°C or 25°C are shown on the left. Quantification of the mean maximum fluorescence plotted as the ratio of fluorescence intensity in neurons over glial cells is shown on the right. Plotted is the mean ± SD, n=30 nematodes/strain/condition. The Mann-Whitney test for non-parametric samples denotes a statistically significant difference with a p-value <0.0001 (****). B: The neuronal expression of GFP driven by the
unc-33 promoter is significantly changed by Temperature. Temperature tolerance curve was constructed by quantifying the ratio of fluorescence intensity in neurons over glial cells of nematodes grown at temperatures of 16°C to 25°C. Plotted is the mean ± SD, n=30 nematodes/strain. One way ANOVA with post hoc Tukey's honestly significant difference (HSD) test denotes statistically significant differences between groups labeled as "a" (16°C), "b" (17-20 °C) and "c" (22-25 °C), p-value <0.01 (**). C: Nematodes grown in different bacterial types showed a statistically significant difference in neuronal expression of GFP driven by the
unc-33 promoter at 16°C. Quantification of the neuronal to glia fluorescence ratio of C. elegans incubated on plates seeded with E.coli OP50 or P. aeruginosa PA14 at 16°C. Plotted is the mean ± SD, n=20 nematodes/strain. The Mann-Whitney test for non-parametric samples denotes a statistically significant difference with a p-value <0.0001 (****). D: Nematodes grown in different bacterial types showed no significant difference in neuronal expression of GFP driven by the
unc-33 promoter at 25°C. Quantification of the neuronal to glia fluorescence ratio of C. elegans incubated on plates seeded with E. coli OP50 or P. aeruginosa PA14 at 25°C. Plotted is the mean ± SD, n=24 nematodes/strain. The Mann-Whitney test for non-parametric samples denotes no significant difference (ns) between the two samples.