Growth phenotype of the Rm1021 AbcR1/2 mutants.

<p>Growth curves in TY broth of Rm1021 harboring pSRK-R1, pSRK-R2 or the empty control vector pSRK (A) and the wild-type Rm1021 and its AbcR1/2 deletion (ΔR1, ΔR2 and ΔR1/2) mutant derivatives (B). OD₆₀₀ readings were determined in triplicate at 2 h intervals from two independent cultures of the tested strains. Standard errors bars are indicated.