| UV-B辐射对2种海洋微藻的生理效应 |
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| 引用本文： | 徐达,唐学玺,张培玉.UV-B辐射对2种海洋微藻的生理效应[J].中国海洋大学学报(自然科学版),2003,33(2):240-244. |
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| 作者姓名： | 徐达 唐学玺 张培玉 |
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| 作者单位： | 中国海洋大学海洋生命学院,青岛,266003 |
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| 基金项目： | 国家自然科学基金项目 (30 2 70 2 58)资助 |
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| 摘 要： | 应用同位素标志法 ,研究了 UV- B辐射增强对三角褐指藻、扁藻核酸和蛋白质合成动态的影响。结果表明 ,三角褐指藻对 UV- B辐射增强的耐受性高于扁藻 ;UV- B辐射增强抑制扁藻的生长和 DNA的合成 ;低剂量的 UV- B辐射刺激三角褐指藻的生长和 DNA的合成 ;高剂量则表现出抑制作用。同时 ,随着 UV- B辐射的增强 ,2种海洋微藻 RNA和蛋白质的合成速度下降 ,其中扁藻合成速度的下降幅度明显大于三角褐指藻 ,表明三角褐指藻 RNA和蛋白质的合成对 UV- B辐射增强的敏感性低于扁藻。
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| 关 键 词： | 海洋微藻 蛋白质 核酸 合成作用 紫外线B |
| 文章编号： | 1001-1862(2003)02-240-05 |
| 修稿时间： | 2002年6月28日 |
The Physiological Effect of UV-B Radiation on Microalgae Two Species of Marine Microalgae |
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| Xu Da,Tang Xuexi,Zhang Peiyu.The Physiological Effect of UV-B Radiation on Microalgae Two Species of Marine Microalgae[J].Periodical of Ocean University of China,2003,33(2):240-244. |
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| Authors: | Xu Da Tang Xuexi Zhang Peiyu |
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| Abstract: | The effect of UV-B radiation enhancement on the synthesis of protein and nucleic acid in Phaeodactylum tricornutum and Platymonas sp. was studied with isotope-tracing methods. The results showed that the tolerance to UV-B radiation enhancement in Phaeodactylum tricornutum was higher than that in Platymonas sp. UV-B radiation enhancement inhibited the growth and DNA synthesis of Platymonas sp., while lower doses of UV-B radiation(<0.8J/m2) could stimulate the growth and DNA synthesis of Phaeodactylum tricornutum, higher doses of UV-B radiation(>0.8J/m2), however, exhibited an in these hibition effect. Meanwhile, the RNA and protein synthesis in two species of marine microalgae decreased with the enhancement of UV-B radiation, but the decrease in Platymonas sp. was more obvious than that in Phaeodactylum tricornutum. Therefore, the sensitivity of RNA and protein synthesis to UV-B radiation enhancement in Phaeodactylum tricornutum was lower than that in Platymonas sp.= |
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| Keywords: | marine microalgae nucleic acid protein synthesis ultraviolet B |
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