Origin of individuality of two daughter cells during the division process examined by the simultaneous measurement of growth and swimming property using an on-chip single-cell cultivation system.
We examined the origin of individuality of two daughter cells born from an isolated single Escherichia coli mother cell during its cell division process by monitoring the change in its swimming behavior and tumbling frequency using an on-chip single-cell cultivation system. By keeping the isolated condition of an observed single cell, we compared its growth and swimming property within a generation and over up to seven generations. It revealed that running speed decreased as cell length smoothly increased within each generation, whereas tumbling frequency fluctuated among generations. Also found was an extraordinary tumbling mode characterized by the prolonged duration of pausing in predivisional cells after cell constriction. The observed prolonged pausing may imply the coexistence of two distinct control systems in a predivisional cell, indicating that individuality of daughter cells emerges after a mother cell initiates constriction and before it gets physically separated into two new cell bodies.
Umehara
Senkei
S
Department of Biomedical Information, Division of Biosystems, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Tokyo 101-0062, Japan.
Inoue
Ippei
I
Wakamoto
Yuichi
Y
Yasuda
Kenji
K
D001419:Bacteria / Q000166:cytology; D018407:Bacterial Physiological Phenomena; D018929:Cell Culture Techniques / Q000379:methods; D002455:Cell Division / Q000502:physiology*; D002465:Cell Movement / Q000502:physiology*; D002477:Cells / Q000166:cytology*; D017930:Genes, Reporter; D049452:Green Fluorescent Proteins / Q000032:analysis; D008954:Models, Biological; D012984:Software
D049452:Green Fluorescent Proteins