Journal Title
Title of Journal: Acta Physiol Plant
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Abbravation: Acta Physiologiae Plantarum
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Publisher
Springer-Verlag
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Authors: Quanfu Wang Yanhua Hou Jinlai Miao Guangyou Li
Publish Date: 2009/02/06
Volume: 31, Issue: 6, Pages: 1097-1102
Abstract
The effect of ultravioletB UVB radiation on Antarctic phytoplankton has become an attractive ecological issue as a result of annual springtime ozone depletion The effects of UVB radiation on the growth and antioxidant enzymes were investigated using Antarctic sea ice microalgae Chlamydomonas sp ICEL as the material in this study The results demonstrated that UVB radiation could notably inhibit the growth especially at high UVB radiation intensity 70 μW cm−2 Malondialdehyde and O2 ·− content in ICEL increased rapidly in early days 1–3 days exposed to UVB radiation enhancement then decreased rapidly In the stress of UVB radiation enhancement the superoxide dismutase peroxidase and Catalase activities of 1–4 days in ICEL were obviously higher than those in the control and their activities became higher at high UVB radiation intensity 70 μW cm−2 These enzymes activity of 7 days would kept stable at low UVB radiation intensity 35 μW cm−2 but kept high level at high UVB radiation intensity 70 μW cm−2 However the ascorbate peroxidase activity in ICEL kept stable under the stress of UVB radiation enhancement The above experimental results indicated that the antioxidant enzyme system played an important role in the adaptation of Antarctic ice microalgae under the UVB radiation change of Antarctic ecosystemsThis study was supported by the natural scientific research innovation foundation in Harbin Institute of Technology No 2008067 the Key Lab of Marine Bioactive Substances SOA No MBS200701 the Natural Science Foundation of Shandong Province No Y2007D58 Science and Technology Development Project of Weihai No 2008087 and the National Natural Science Foundation of China No 40876107
Keywords:
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