. 2016 Mar 1;11(3):e0150348. doi: 10.1371/journal.pone.0150348

Table 2. Killing of B. subtilis forespores of various strains by DNA-damaging treatments.

Strain	LD₉₀^a
Strain	M-C (ng/mL)	UV-C (J/m²)
WT (168)	1,347 ± 74.4 ^b	119.2 ± 14.6 ^b
PERM938 (Δmfd)	187.7 ± 13.2 ^c	20.8 ± 3.9 ^c
PERM1030 (ΔrecA)	53.1 ± 5.7 ^d	16.1 ± 3.7 ^c
PERM1PP033 (Δmfd recA)	12.7 ± 2.9 ^e	3.9 ± 1.1 ^d

^a B. subtilis sporangia from stage T_4.5 were exposed to different concentrations of M-C or different doses of UV-C irradiation in order to determine the lethal dose to kill 90% of initial colony forming units (LD₉₀). Results are expressed as averages ± SD of at least three independent experiments.

Superscripts b, c, d and e indicate statistically significant differences between strains under the same treatment as determined by one-way ANOVA followed by a Tukey’s post hoc test; P < 0.05.