[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.
Paronian
A Kh
AKh
Institute of Microbiology, National Academy of Sciences of Armenia, Abovyan.
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