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Table 2 Growth inhibitory effect of plumbagin against different E. coli mutants

From: A role of ygfZ in the Escherichia coli response to plumbagin challenge

Strain tested Relative sensitivity to plumbagin at different amounts*
  20 μg 50 μg 100 μg
WT, ΔmdaB, ΔnfnB, Δnfo, ΔyggX or ΔmarA - - -
ΔsoxR, ΔsoxS, or ΔahpC - - +
ΔsodA + ++ ++
ΔygfZ + ++ +++
  1. * Bacteria were plated on MH agar plates with plumbagin absorbed on an 8-mm filter paper disc.
  2. -: inhibition zone < 15 mm; +: 15 mm < inhibition zone < 25 mm; ++: 25 mm < inhibition zone < 35 mm; +++: inhibition zone > 35 mm