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A Luminous Bacterium That Emits Yellow Light

1977; American Association for the Advancement of Science; Volume: 196; Issue: 4288 Linguagem: Inglês

10.1126/science.850787

1095-9203

Edward G. Ruby, Kenneth H. Nealson,

Molecular Communication and Nanonetworks

A strain of Photobacterium fischeri that emits yellow light has been isolated from seawater. The bimodal spectrum, which is unique among the luminous bacteria, consists of a major band with a maximum at 545 nanometers and a minor band with a maximum at 500 nanometers. The former represents a heretofore unreported range of emission for luminous bacteria, while the latter coincides with the emission spectrum of typical blue-green-emitting strains of P. fischeri. The relative contributions of these two bands to the total in vivo luminescence changes as a function of ambient temperature. When luciferase is extracted and luminescence observed in vitro, the emission is entirely blue-green, identical with that of luciferase isolated from other strains of P. fischeri.