Relationship of Escherichia coli density to growth rate and cell age.

Journal of Bacteriology
E Martínez-SalasM Vicente

Abstract

The cell densities of Escherichia coli strains B/rA, BrF, and K-12 (OV-2) were measured at several growth rates and found to be very near 1.105 g/ml in all cases. Ninety percent of the cells of any exponentially growing population banded at densities differing less than 0.75% from the mean. Synchronized populations of B/rA selected as newborn cells were found to keep their density constant for longer than one generation time. However, if selection was based on cell size, by sedimentation through a sucrose gradient, cell density was found to be almost 2% lower than that of newborn cells, but it reached normal values before the first division had taken place. These results meant that mass and volume during the lifetime of the bacterial cell followed parallel kinetics. It was unlikely that density could regulate any event of the lifetime of a cell; on the contrary, density seemed to be a physical parameter that was well controlled during the bacterial growth.

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Citations

Oct 16, 2012·Applied Microbiology and Biotechnology·M-K H WinklerM C M van Loosdrecht
Oct 29, 2015·Molecular Microbiology·Samuel M D OliveiraAndre S Ribeiro
Mar 14, 2019·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Mohan AmarasiriDaisuke Sano
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Sep 30, 2020·FEMS Microbiology Reviews·Alix MeunierManuel Campos
Jun 6, 2018·Frontiers in Microbiology·Ghislain Y Gangwe NanaVic Norris
Dec 21, 2019·Scientific Reports·Yao-Kuan WangChien-Jung Lo
Apr 1, 1984·Journal of Bacteriology·H E KubitschekR Graetzer
May 1, 1984·Journal of Bacteriology·W W Baldwin, H E Kubitschek
Oct 24, 2002·Current Opinion in Plant Biology·Crisanto GutierrezJ Carlos del Pozo
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Jul 1, 1984·Journal of Bacteriology·W W Baldwin, H E Kubitschek
Jul 23, 2021·PLoS Computational Biology·Liliana Angeles-Martinez, Vassily Hatzimanikatis
Jul 23, 2021·PLoS Computational Biology·Liliana Angeles-Martinez, Vassily Hatzimanikatis
May 16, 2015·Analytical Chemistry·Ashok A KumarGeorge M Whitesides
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Nov 15, 2007·The Journal of Physical Chemistry. a·Prabhu U ArumugamJun Li
Nov 2, 2021·Journal of the American Chemical Society·Hayley N Brawley, Paul A Lindahl

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