Fig. 5.

Infection competitiveness of symbiotic bacteria against nonnative bacteria. Competitiveness of SBE (B. insecticola) against PBE (B. fungorum), and Pandoraea (Pan: P. norimbergensis) in in vitro growth (A) and in vivo (B). Inoculum doses are indicated in CFU. Each dot represents a CI value from a microtube or an insect. The CI values are obtained by (output SBE colony count/input SBE colony count)/(output competitor colony count/input competitor colony count) and statistically evaluated by the 1-sample t test (against CI = 1.0). NS, not significant. (C and D) Visualization of the in vivo competition dynamics. An RFP-labeled SBE strain was coinoculated with a GFP-labeled strain of PBE (C) or Pandoraea (D). dpi, days postinoculation. (Scale bars, 0.2 mm.)