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Table 1 Sporulation frequency of B. amyloliquefaciens and B. megaterium

From: Identification of diacetonamine from soybean curd residue as a sporulation-inducing factor toward Bacillus spp.

Species (conditions) B. amyloliquefaciens (%, 48 h) B. megaterium (%, 72 h) B. megaterium (%, 96 h)
Compound (concentration)
1b (40 µM) 35 55
1b (400 µM) 51 36 70
2 (400 µM) 54
3 (40 µM) 99 85
3 (400 µM) 69 2 66
4 (400 µM) 6
Control 1 0 7
  1. Sporulation frequency (%) is calculated by counting spores and vegetative cells in randomly selected different views. (−) Not tested. More than 300 cells were counted and classified into spores and vegetative cells. For 1b and 3, sporulation assays were repeated trice to confirm their reproducible sporulation inducing activities