Table 2.

Nodule occupancy analysis of Rieske mutants.

Strain	N° cells/nodule	SD
tatC	3.8 × 102	8.3 × 101	a
2707/0970	7.6 × 105	1.5 × 105	b
2707	1.0 × 106	2.6 × 105	b
0970	2.2 × 106	7.5 × 105	c
Wild-type	1.1 × 107	9.1 × 105	d

For each bacterial strain, six nodules were surface sterilized and plated individually on AB medium. Data was analyzed by Kruskal–Wallis and Mann–Whitney pairwise comparisons. Different letters indicate significant differences: a, differs from b, c, and d, at p < 0.01; b differs from c at p < 0.05; c differs from d at p < 0.05; b differs from d at p < 0.01. SD, standard deviations from replicates.