[Growth of phototrophic bacterium Rhodobacter sphaeroides and formation of carotenoids on mineral water "Dzhermuk"].
A possibility to use thermal carbon sulphate-hydrocarbonate mineral waters "Dzhermuk" as the basis of nutrient medium for growing has been established. No distinct correlation was observed between biomass accumulation and carotenoids formation: maximum yields of the biomass is registered under microaetrophilic growth conditions, while that of carotenoids--under anaerobic conditions. Maximum synthesis of carotenoids is observed at illumination of 1000-1500 lx, more intensive illumination (3000 lx) results in the decrease of their synthesis. Spheroiden, which makes up about 40-45% of the total amount of carotenoids, is predominant. The biomass drying and storage period (2 yr.) affect inconsiderably the quantitative composition of pigments.
Institute of Microbiology, National Academy of Sciences of Armenia, Abovyan.
A Kh
AKh
Paronian
D000332:Aerobiosis; D000693:Anaerobiosis; D002338:Carotenoids / Q000096:biosynthesis* / Q000737:chemistry; D003470:Culture Media; D008027:Light; D008900:Mineral Waters; D012242:Rhodobacter sphaeroides / Q000254:growth & development* / Q000378:metabolism*
D003470:Culture Media; D008900:Mineral Waters; C005637:spheroidene; D002338:Carotenoids