TABLE 5

Effect of enhanced wss transcription on fitness of SM

SpatiallyRelative fitness
in a spatially
structured
environment
Relative fitness
in an unstructured
environment
SM (PR1252)1.01 (0.02)0.98 (0.01)
SM nptII-wss1.10 (0.04)0.96 (0.02)
WS (PR1200)1.67 (0.09)0.33 (0.01)
  • Data are mean fitness ± standard errors from three replicate cultures. Relative fitness was measured after 24 hr. Two-way ANOVA test of genotype vs. environment for SM and SM nptII-wss shows no overall fitness difference between strains (P = 0.215), but a slight interaction between genotype and environment (SM nptII-wss is slightly fitter than SM in the spatially unstructured environment; P = 0.054).