title: Ultraviolet-B radiation improves astaxanthin accumulation in green microalga Haematococcus pluvialis.
abstract: Ultraviolet-B (UV-B) radiation has significantly negative effect on cell survival rate (P < 0.01) and positive effect on astaxanthin accumulation (P < 0.01) of Haematococcus pluvialis. H. pluvialis accumulated 3.2 mg/g of astaxanthin when being exposed to 5 W/m(2) of UV-B for 60 min prior to 72 h of high light treatment, which was 122% higher than that of the control. This UV-B treatment also significantly stimulated lipid peroxidation and the value of malondialdehyde and glutathione peroxidase activities were 156 and 166% higher than those of control, respectively (P < 0.01).
authors.affiliation: Department of Biology and Kwong Living Trust Food Safety & Analysis Laboratory, Hong Kong Baptist University, Kowloon Tong, Hong Kong.
authors.forename: Zhengyun
authors.initials: Z
authors.lastname: Wu
authors.forename: Guanqun
authors.initials: G
authors.lastname: Chen
authors.forename: Siukuen
authors.initials: S
authors.lastname: Chong
authors.forename: Nai-Ki
authors.initials: NK
authors.lastname: Mak
authors.forename: Feng
authors.initials: F
authors.lastname: Chen
authors.forename: Yue
authors.initials: Y
authors.lastname: Jiang
mesh_terms: D002470:Cell Survival / Q000528:radiation effects; D005978:Glutathione / Q000378:metabolism; D008027:Light; D050356:Lipid Metabolism; D015227:Lipid Peroxidation; D008315:Malondialdehyde / Q000378:metabolism; D010084:Oxidation-Reduction; D013997:Time Factors; D014466:Ultraviolet Rays; D016823:Volvocida / Q000378:metabolism* / Q000528:radiation effects*; D024341:Xanthophylls / Q000378:metabolism
chemical_list: D024341:Xanthophylls; D008315:Malondialdehyde; C005948:astaxanthine; D005978:Glutathione