Fig. 4.

Supplemental far-red light affects wild-type, but not iflA mutant, growth. Wild-type and iflA cultures grown in (A) 30- or (B) 15-µmol photons m⁻²⋅s⁻¹ white light, or (C) 15-µmol photons m⁻²⋅s⁻¹ white light plus 5-µmol photons m⁻²⋅s⁻¹ of supplemental far-red light. (D) Comparison of growth curves for wild-type and iflA mutant grown in 15-µmol photons m⁻²⋅s⁻¹ white light, with or without 5-µmol photons m⁻²⋅s⁻¹ of supplemental far-red light. Horizontal red line in B indicates the A₇₅₀ at which iflA cells shift from slower to wild-type growth. Error bars represent SEM.