title: Influence of nutritive factors on C50 carotenoids production by Haloferax mediterranei ATCC 33500 with two-stage cultivation.
abstract: The production of pigments by Haloferax mediterranei ATCC 33500 with two-stage cultivation in response to nutritive factors in culture media was studied. Sodium chloride and magnesium sulfate in the second-stage media showed a marked effect upon the production of pigments, and sodium acetate could enhance the production. As the cells were harvested at mid-log phase of growth in first-stage cultivation and transferred to the defined media containing 5% sodium chloride, 0.1% sodium acetate and 8% magnesium sulfate at 37 degrees C, 120 rpm for further 24 h of cultivation, H. mediterranei exhibited to be an efficient producer of pigments. The yield of pigments could reach up to 0.604 A(494 nm) mL(-1) broth. TLC analysis and the UV-Vis spectra of individual spots thereof revealed that H. mediterranei produced three red pigments of C(50) carotenoid, namely bisanhydrobacterioruberin, monoanhydrobacterioruberin and bacterioruberin, as well as a C(45) carotenoid, 2-isopentenyl-3,4-dehydrorhodopin.
authors.affiliation: Department of Agricultural Chemistry, National Taiwan University, Taipei, Taiwan.
authors.forename: Chun-Jen
authors.initials: CJ
authors.lastname: Fang
authors.forename: Kuo-Lung
authors.initials: KL
authors.lastname: Ku
authors.forename: Min-Hsiung
authors.initials: MH
authors.lastname: Lee
authors.forename: Nan-Wei
authors.initials: NW
authors.lastname: Su
mesh_terms: D002338:Carotenoids / Q000096:biosynthesis*; D019623:Haloferax mediterranei / Q000378:metabolism*; D006358:Hot Temperature; D010316:Particle Size
chemical_list: D002338:Carotenoids