Effect of UV-B radiation on the growth and antioxidant enzymes of Antarctic sea ice microalgae Chlamydomonas sp.ICE-L

• Autorzy: Wang Q. , Hou Y. , Miao J. , Li G.
• Języki publikacji: EN

Abstrakty

EN

The effect of ultraviolet-B (UV-B) radiation on Antarctic phytoplankton has become an attractive ecological issue as a result of annual springtime ozone depletion. The effects of UV-B radiation on the growth and antioxidant enzymes were investigated using Antarctic sea ice microalgae Chlamydomonas sp. ICE-L as the material in this study. The results demonstrated that UV-B radiation could notably inhibit the growth, especially at high UV-B radiation intensity (70 µW cm⁻²). Malondialdehyde and O₂˙⁻ content in ICE-L increased rapidly in early days (1–3 days) exposed to UV-B radiation enhancement, then decreased rapidly. In the stress of UV-B radiation enhancement, the superoxide dismutase, peroxidase and Catalase activities of 1–4 days in ICE-L were obviously higher than those in the control, and their activities became higher at high UV-B radiation intensity (70 µW cm⁻²). These enzymes activity of 7 days would kept stable at low UV-B radiation intensity (35 µW cm⁻²), but kept high level at high UV-B radiation intensity (70 µW cm⁻²). However, the ascorbate peroxidase activity in ICE-L kept stable under the stress of UV-B 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 UV-B radiation change of Antarctic ecosystems.

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 2009
• Tom: 31
• Numer: 6
• Opis fizyczny: p.1097-1102,fig.,ref.

Twórcy

autor

Wang Q.

• School of the Ocean, Harbin Institute of Technology, Weihai, Shandong 264209, People's Republic of China

autor

Hou Y.

• School of the Ocean, Harbin Institute of Technology, Weihai, Shandong 264209, People's Republic of China

autor

Miao J.

• Key Lab of Marine Bioactive Substances, First Institute of Oceanography, State Oceanic, Administartion, Qingdao, Shandong 266061, People's Republic of China

autor

Li G.

• Key Lab of Marine Bioactive Substances, First Institute of Oceanography, State Oceanic, Administartion, Qingdao, Shandong 266061, People's Republic of China

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