Effect of magnesium ion on crt gene expression in improving carotenoid yield of Rhodobacter sphaeroides.

Archives of microbiology

PubMedID: 26371061

Liu S, Li X, Zhang G, Zhang J. Effect of magnesium ion on crt gene expression in improving carotenoid yield of Rhodobacter sphaeroides. Arch Microbiol. 2015;.
This study aimed at increasing carotenoid yield of Rhodobacter sphaeroides in wastewater treatment by adding magnesium ion (Mg(2+)). RESULTS
showed that Mg(2+) could improve R.sphaeroides biomass and carotenoid yield effectively. The highest carotenoid yield of 4. 83 ± 0. 14 mg/g biomass and biomass production of 3900 ± 180 mg/L were achieved at optimal Mg(2+) concentration of 15 mmol/L. Mechanism analysis revealed that Mg(2+) could promote carotenoid production by regulating the expressions of crt genes. Up-regulation of crtBDA genes improved carotenoid biosynthesis of R. sphaeroides.