Bacterial bioluminescence: its control and ecological significance.

INTRODUCTION ... 496 BIOCHEMI STRY 497 TAXONOMIC RELATIONSHPS OF LUMINOUS BACTERIA ................. 499 Marine Forms ............................................................. 499 Terrestrial and Freshwater Forms .......................................... 501 CONTROL OF THE SYNTHESIS AND ACTIVITY OF THE LUMINESCENT SYSTEM 501 Autoinduction ...... 501 Catabolite Repression ...................................................... 503 Composition of the Growth Medium ......................................... 503 Oxygen .......... 504 Pyruvate and Excretion Products .................... ................. 504 Dark (K) Variants of Luminous Bacteria........ 504 HABITATS AND DISTRIBUTION OF LUMINOUS BACTERIA ............... 505 Free Living ................................................................. 505 Saprophytic Forms: Natural Enrichments ................................... 507 Commensal Forms .......................................................... 508 Parasites 508 Marine 508 Nonmarine .. 508 Light Organ Symbionts ..................................................... 509 Teleost fishes ............................................................. 509 Squid 510 Nonculturable symbionts ............................ ..................... 510 Endosymbionts 512 FUNCTIONS OF BIOLUMINESCENCE .............................. ......... 512 Vestigial or Nonfunctional Hypotheses ...................................... 512 Biochemical Functions 513 Biological Functions ........................................................ 513 light organ luminescence ................................................ 513 Dispersion and propagation ................................. ...... 513 PERSPECTIVES: LUMINOUS AND NONLUMINOUS BACTERIA ............ 514 LITERATURE CMD ......................................................... 515