Paired comparison results frompure and mixed-culture M. truncatula libraries. Each point indicates the dissimilarity of a test sequence compared with a plant training set (A
1 or A
2) and one of three microbial symbiont training sets: (a) Stramenopile and P. infestans EST sequences (B
1); (b) pooled zygomycete and chytridiomycete coding sequences (B
2); and (c) sequences from the genera Rhizobium, Sinorhizobium and Bradyrhizobium (B
3). Sequences from M. truncatula axenic (green) and microbial symbiont mixed culture libraries are represented in each panel. The identity function (y = x) is also shown.