Ultraviolet-B radiation improves astaxanthin accumulation in green microalga Haematococcus pluvialis.
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).
Wu
Zhengyun
Z
Department of Biology and Kwong Living Trust Food Safety & Analysis Laboratory, Hong Kong Baptist University, Kowloon Tong, Hong Kong.
Chen
Guanqun
G
Chong
Siukuen
S
Mak
Nai-Ki
NK
Chen
Feng
F
Jiang
Yue
Y
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
D024341:Xanthophylls; D008315:Malondialdehyde; C005948:astaxanthine; D005978:Glutathione