Figure 3.

Strain frequency estimates for 68 E. meliloti strains in nodules of wild-type M. truncatula (WT) plants, plants with the NPD2 gene knocked out (npd2), and plants with all five NPD genes knocked out (npd1–5) . Points indicate median frequency across replicates, and lines span from minimum to maximum values. Scales have been split for readability, and strains are ordered based on frequency in wild-type nodules. Dashed line indicates median overall strain frequency in the initial inoculum.