Acridine orange as an alternative to optical density to study growth kinetics of Lactobacillus bulgaricus ATCC 7517.

Autor: Pak, Dolar1 (AUTHOR), Koo, OkKyung1 (AUTHOR), Story, RobertS.1 (AUTHOR), O'Bryan, CorlissA.1 (AUTHOR), Crandall, PhilipG.1 (AUTHOR), Lee, Sun-Ok1 (AUTHOR), Ricke, StevenC.1 (AUTHOR) sricke@uark.edu
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Zdroj: Journal of Environmental Science & Health. Part B. Pesticides, Food Contaminants & Agricultural Wastes. Jun2013, Vol. 48 Issue 6, p512-515. 4p. 1 Chart, 5 Graphs.
Abstrakt: In this study we assessed the use of acridine orange as an alternative to optical density to quantify the growth ofLactobacillus bulgaricusATCC 7517. The growth of bacteria inLactobacillusde Man Rogosa Sharpe (MRS) medium was measured by both acridine orange (AO) and optical density (OD) measurements for 24 h. The relationship between both methods was compared via correlation analysis. The doubling time of bacteria based on the values of OD600and AO obtained during 24 h growth were also calculated. The result shows strong correlation of cell growth between OD600and AO during the first 10 hours of growth, but the correlation was less strong when analyzing the data from 0 to 24 hours. Growth rates, generation time and lag time were also similar. This study indicates that AO could be used in place of OD to prepare growth curves ofLactobacillus bulgaricusduring the exponential phase of growth, and to compare growth rates, generation times or lag times. [ABSTRACT FROM PUBLISHER]
Databáze: GreenFILE
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