Fig 4.

Persistence of wild-type and psaN-deficient P. stewartii in the flea beetle gut. Beetles were allowed to feed on maize infected with wild-type (DC283; dark gray) or psaN-deficient (DM5121; light gray) strains of P. stewartii for 2 days and then moved to healthy maize, as outlined in Materials and Methods. (A) Percentage of P. stewartii-infected beetles; (B) relative abundance of bacterial foci in beetle guts (rated on a scale of 0 to 4). Data are mean ± standard errors (SE) for 7 to 9 individuals from three biological replicates. *, significantly different (P < 0.05).