Aliivibrio fischeri is bioluminescent at high 109 cfuml but

Aliivibrio fischeri is bioluminescent at high (>109 cfu/ml) but not at low cell densities. Suppose that an overnight culture of A. fischeri (1010 cfu/ml) is centrifuged to remove all microbial cells and the carbon source is replenished. Predict the expression of luciferase (bioluminescence) over time if this medium were reinoculated with A. fischeri (106 cfu/ml) and incubated.

Solution

Lucifersae releases blue or green light via oxidation of reduced flavin mono nucleotide and long chain aldehyde by diatomic oxygen.A.fischeri has already bioluminescence properties that can survive on decaying organic matter.Bioluminescence is regulated by auto induction and requires high colony concentrations of A.fischeri although lux operan encodes enzymes necessary for glowing of bacteria.