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Figure 3 | BMC Microbiology

Figure 3

From: Measurement of microbial activity in soil by colorimetric observation of in situ dye reduction: an approach to detection of extraterrestrial life

Figure 3

Reduction of DCIP dye by the heat-treated control soil and the extraterrestrial surrogate soil (Idaho red sand) Data points represent: (■), autoclaved (killed) control soil; (▲), live soil; () blank, no soil. Data points are means of 3 replicates. Error bars represent +/- standard deviation. Dye-only controls showed no reduction over the time course of the experiment. AU = Absorbance Units

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