Colonization kinetics of wild-type vs. <i>cpm2</i> mutant roots.

<p><b>A</b>) Colonization of wild type and <i>cpm2</i> roots with <i>Rhizophagus irregularis</i> at six weeks post inoculation (wpi). Fungal structures were stained by trypan blue. A non-colonized wild type root is shown on the left for comparison. A, arbuscule; EH, extraradical hypha; V, vesicle; size bars, 100 μm. <b>B</b>) Plants were inoculated with <i>Rhizophagus irregularis</i> and percent root length colonization was scored with a modified gridline intersect method after trypan blue staining. Means and standard errors from three biological replicates each consisting of a pool of two root systems are shown. Each replicate was represented by 20 root pieces of 2 cm length. As shown by letters no significant differences were found between <i>cpm2</i> and wild-type (ANOVA, posthoc Tukey; p≤0.05, n = 24). F_{7, 16}(total) = 1.257; F_{7, 16}(int. hyphae) = 1.153, F_{7, 16}(arbuscules) = 1.067, F_{7, 16}(vesicles) = 1.938.