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Seasonal Variation in Cell Volume of Epilimnetic Bacteria

Thomas H. Chrzanowski, R. D. Crotty and G. J. Hubbard
Microbial Ecology
Vol. 16, No. 2 (Sep., 1988), pp. 155-163
Published by: Springer
Stable URL: http://www.jstor.org/stable/4251012
Page Count: 9
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Seasonal Variation in Cell Volume of Epilimnetic Bacteria
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Abstract

The relationship between bacterial cell volume and temperature was examined for field data collected over a 4-year period and through controlled chemostat incubations of a Pseudomonas sp. Volumes of planktonic bacteria were found to decrease as water temperature increased. Changes in temperature accounted for 38% of the variation in average cell volume (P < 0.001). Average planktobacterial cell volume fell 42% from 0.217 μ m3 in mid-winter to 0.127 μ m3 in mid-summer. Similar results were found for the size distribution of epibacterial cells. Controlled chemostat incubations of a Pseudomonas sp. indicated that cell volume was significantly affected by temperature, growth rate, and the interaction of temperature and growth rate. The data suggest that a change in cell volume as a result of a change in temperature is an intrinsic property of planktonic bacteria.

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