Abstract
A truly psychrotrophic strain ofChromobacterium, which was isolated from Lake Ontario sediment and characterized asChromobacterium lividum, was found to be capable of pigment production that was completely prevented at 0°C, although growth readily occurred. Normal pigment formation occurred at 15°C, 20°C, and 25°C. The prevention of synthesis of the pigment at 0°C, which was confirmed spectrophotometrically to be violacein, was not reversed by the presence of various carbon sources, although all except one acted as growth substrates. In addition, some of the carbon sources actually inhibited pigment production at 20°C, preventing violacein synthesis in the presence of pyruvate which was shown to allow pigmentation. Similar results were obtained under both liquid and solid media cultivation conditions.
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Inniss, W.E., Mayfield, C.I. Effect of temperature on violacein production in a psychrotrophicChromobacterium from Lake Ontario sediment. Microb Ecol 5, 51–56 (1979). https://doi.org/10.1007/BF02010578
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DOI: https://doi.org/10.1007/BF02010578