Figure 5

Effect of live pathogen and pathogen fragments on root colonization with rhizobia and arbuscular mycorrhizal fungi. Common bean plants were inoculated with rhizobia and AMF. Seven days after rhizobial and AMF inoculated, plants were treated with live Colletotrichum gloeosporioides and C. gloeosporioides fragments. At day 14 and 21 after pathogen treatments colonization of plant roots with (a) rhizobia (number of root nodules) and (b) percent of roots showing arbuscular mycorrhiza (AMF) colonization were quantified. Values shown are means ± SD; n =9 plants per day and treatment. Letters on top of the columns indicate significant differences among pathogen treatment groups according to post-hoc analysis (Tukey’s HSD; P <0.05) after one-way ANOVA.