期刊
JOURNAL OF BACTERIOLOGY
卷 191, 期 18, 页码 5758-5764出版社
AMER SOC MICROBIOLOGY
DOI: 10.1128/JB.00660-09
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资金
- Robert A. Welch Foundation [F-1573]
- Sid W. Richardson Foundation
Most research on growing bacterial colonies on agar plates has concerned the effect of genetic or morphotype variation. Some studies have indicated that there is a correlation between microscopic bacterial motion and macroscopic colonial expansion, especially for swarming strains, but no measurements have been obtained for a single strain to relate the microscopic scale to the macroscopic scale. We examined here a single strain (Paenibacillus dendritiformis type T; tip splitting) to determine both the macroscopic growth of colonies and the microscopic bacterial motion within the colonies. Our multiscale measurements for a variety of growth conditions revealed that motion on the microscopic scale and colonial growth are largely independent. Instead, the growth of the colony is strongly affected by the availability of a surfactant that reduces surface tension.
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