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《Journal of Jiangxi Normal University(Natural Science Edition)》 2010-05
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Effects of UV-B Stress on Photosynthetic Activity and Antioxidase of Chlorella vulgaris Antarctic Strain

SUN Li,LI Shou-chun(College of Life Science,Jiangxi Normal University,Nanchang Jiangxi 330022,China)  
The experiments of UV-B on Chlorella vulgaris Antarctic strain and Chlorella vulgaris have been carried on which both had physical training to UV-B.The results showed that:Absorption spectrum of pigment declined during 24 h UV-B exposure.The declining range of Chlorella vulgaris Antarctic strain was smaller than Chlorella vulgaris.The photosynthetic oxygen enolution rate of Chlorella vulgaris Antarctic strain and Chlorella vulgaris were inhibited by 54.27% and 74.8% respectively after 80 min UV-B treatment.The activities of MV-H2O,PSⅠ,PSⅡ declined under 80 μW·cm-2 light intensity of UV-B for 30 min UV-B treatment,but the activities of MV-H2O,PSⅠ,PSⅡ of Chlorella vulgaris dramatically declined were.Both CAT(catalase) activity and SOD(superoxide dimutase) activity increased at first,then decreased while the activities of Chlorella vulgaris Antarctic strain increased dramatically.Conclusion:Both Chlorella vulgaris Antarctic strain and Chlorella vulgaris were damaged by UV-B but the damage on Chlorella vulgaris Antarctic strain was smaller.Anti-oxidase played a protected role.Compared to Chlorella vulgaris,Chlorella vulgaris Antarctic strain to bear UV-B was stronger.
【CateGory Index】: Q945
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