RT Book, Section T1 Photobacterium. A1 Labella Vera, Alejandro Manuel A1 Borrego-García, Juan José A2 Romalde, Jesús K1 Bacterias gram negativas AB Pho.to.bac.te’ri.um. Gr. neut. n. phôs, light; Gr. neut.dim. n. bakterion, a small rod; N.L. neut. n. Photobacterium, light (-producing) bacterium.The genus Photobacterium contains 37 species withvalidated names and 3 species whose names havenot been validated. Cells are short bacilli Gram-stainnegative, and nonsporulated. Facultatively anaerobic. Require NaCl for growth (optimal concentration1 – 3%). Several species present bioluminescence. Someof them are piezophilic and others are psychrophilic.Isolated from marine environment (seawater andsediment), associated with aquatic animals (mutualism relationships), but some are pathogens forpoikilothermic and homeothermic animals.DNA G + C content (mol%): 38.5–53.6.Type species: Photobacterium phosphoreum Beijerinck 1889AL (basonym: Micrococcus phosphoreus Cohn1878). PB Wiley YR 2023 FD 2023-06-09 LK https://hdl.handle.net/10630/36729 UL https://hdl.handle.net/10630/36729 LA eng NO Photobacterium. In: Bergey´s Manual of Systematics of Archaea and Bacteria (BMSAB) (2023). Jesus L. Romalde (Ed). Wiley doi: 10.1002/9781118960608.gbm01076.pub2. NO https://authorservices.wiley.com/author-resources/Journal-Authors/licensing/self-archiving.html DS RIUMA. Repositorio Institucional de la Universidad de Málaga RD 19 ene 2026