title: Effects of salinity on beta-carotene production by Dunaliella tertiolecta DCCBC26 isolated from the Urmia salt lake, north of Iran.
abstract: This study examined the effect of different salt concentrations (0.05-3 M of NaCl) on the kinetics of growth, total carotenoids and beta-carotene (all-trans and 9-cis) accumulated in Dunaliella tertiolecta DCCBC26, a microalgae strain isolated from the Urmia hypersaline lake, northwest of Iran. Results indicated that the highest amount of carotenoids detected (11.73 mg/l) was in the salinity of 0.5 M NaCl during the stationary growth phase. The percentage of the all-trans and 9-cis-beta-carotene in the exponential phase were 92% and 32% in salinities of 3 M and 0.5 M, respectively. However, only 23% of the beta-carotene was detected in the stationary growth phase of the microalgae in 0.5 M salinity and was 9-cis isomer.
authors.affiliation: Department of Drug and Food Control and Pharmaceutical Sciences Research Center, School of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran. fazelimo@sina.tums.ac.ir
authors.forename: M R
authors.initials: MR
authors.lastname: Fazeli
authors.forename: H
authors.initials: H
authors.lastname: Tofighi
authors.forename: N
authors.initials: N
authors.lastname: Samadi
authors.forename: H
authors.initials: H
authors.lastname: Jamalifar
mesh_terms: D018929:Cell Culture Techniques; D000460:Chlorophyta / Q000254:growth & development / Q000378:metabolism*; D007492:Iran; D012965:Sodium Chloride / Q000494:pharmacology*; D019207:beta Carotene / Q000096:biosynthesis*
chemical_list: D019207:beta Carotene; D012965:Sodium Chloride