by Elio
Enhanced bioluminescence in an arcA mutant of V. fischeri. Culture flasks of wild type strain ES114 and its arcA mutant illuminated (top panel) or in the dark (bottom panel). Source.
Why some bacteria are bioluminescent is a topic that just won't go away. In an earlier post, we mentioned a proposal for a role of light in the repair of UV-induced DNA damage. In 2005, Eric Stabb wrote a review in Microbe (an ASM magazine) that pleasantly helps in formulating the issues and clarifying the nature of this fascinating phenomenon. We may not have the definitive answers, but Stabb helps us think about the questions.
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