Figure 4.

Carbon uptake rates per cell for “Thiodictyon syntrophicum” strain Cad16^T cultures for two conditions (day/night) during 4 h incubation in situ. ¹⁴C-radioisotope uptake experiments were performed on six biological replicates. Two side t-test statistics was applied. The difference in uptake rates between the two conditions was statistically significant at p < 0.05 (p = 0.02). Center lines show the medians; box limits indicate the 25th and 75th percentiles as determined by R software; whiskers extent 1.5 times the interquartile range from the 25th and 75th percentiles; crosses represent sample means; bars indicate 83% confidence intervals of the means; data points are plotted as open circles. n = 6 sample points.