Biomass and nodule number of L. strigosus inoculated with ancestral versus in vitro evolved Bradyrhizobium.

1Dry host shoot biomass (Shoot) and root biomass (Root) are measured in grams (g) with standard error (se) from infections with ancestral (ancest.) and evolved (evolv.) cultures.2N, F and p values are given for a two-tailed ANOVA comparing relative growth effects and nodules formed from infections with ancestral (ancest.) and evolved (evolv.) cultures.3C refers to blocks of un-inoculated control plants which showed no significant variation in growth across blocks.