TABLE 1.
Levels of Ca-DPA in spores of different Bacillus species and strainsa
| Species and strainb | Mean Ca-DPA level (amol) in spores | SD, amol (%)c |
|---|---|---|
| B. cereus T | 516 | ±81 (16) |
| B. megaterium QM B1551 | 420 | ±84 (20) |
| B. subtilis | ||
| PS832 (wt) | 384 | ±59 (15) |
| FB62 (gerD) | 391 | ±51 (13) |
| PS832 (2% xyl) | 294 | ±40 (14) |
| PS3413 (2% xyl) | 244 | ±41 (17) |
| PS3413 (0.5% xyl) | 174 | ±38 (22) |
| PS832 (wt)d | 351 | ±11 (3) |
a
Ca-DPA levels in 200 individual spores of various Bacillus species and strains were determined as described in Materials and Methods, and mean values and standard deviations were calculated.
b
wt, wild type; xyl, xylose. In strain PS3413 the spoVA operon is under the control of Pxyl.
c
The value in parentheses is the percent standard deviation from the mean.
d
In this case the Ca-DPA level in a single spore was measured 200 times.