Table 2.
Acceleration of development of Arthromitus-Bacillus* by light
| Time after inoculation | Colony morphology and light microscopic appearance
|
|
|---|---|---|
| Light-grown | Dark-grown | |
| Day 1 | ||
| 0–3 hr | cd 0.5–0.8 cm; unicells, diplocells | No apparent growth |
| 3–6 hr | cd 0.8–1.5 cm; diplocells, short filaments | cd <0.5 cm; unicells |
| 6–9 hr | Short and long filaments | cd 0.5 cm; unicells, diplocells |
| 9–24 hr | Filaments, some endospores | Short filaments |
| Day 2 | Unicells, diplocells, endospores, some mature spores | Unicells, diplocells, short and long filaments (5–180 cell lengths) |
| Day 3 | cd 2–3 cm; unicells, sporulated diplocells, no filaments | Short and long filaments, no spores; cd 0.5–1.0 cm |
| Day 4 | Mature spores | Long and short filaments, few spores |
Abbreviation: cd, colony diameter. “Endospores” if parent cell visible; “spores” refers to mature spores, no parental cells.
*Strain JJ#1 from Porcellio scaber (18).