| 摘要: |
| 底栖蓝藻(Tolypothrix sp.)是一些底栖动物如介形虫的良好食物,在自然状态下 呈丝状,但经室内培养后会形成很大的且难以分开的球形群体本研究着眼于这种蓝藻在室内培 养条件下的光合效率的测定,运用同位素14 C方法和黑白瓶测氧法对不同光照强度和温度下它的 光合效率和呼吸率进行对比测定.结果表明,底栖蓝藻的光合效率随温度的提高而增加,但呼吸的 变化与温度没有明显的关系.此蓝藻在光照强度低于 400μEm-2 s-1时光合效率几乎不随光强的变 化而变化,说明此底栖藻类对低光照强度的适应性.比较同位素14 C方法和黑白瓶测氧法的结果, 此蓝藻的光合效率比率为1.11本研究在对此类藻类的研究方法上有新的探索,为此类底栖蓝藻 的生态学研究提供了可行的实验手段. |
| 关键词: 底栖蓝藻(Tolypothrixsp.) 光合效率 温度 光照强度 |
| DOI：10.18307/1999.0214 |
| 分类号: |
| 基金项目:奥地利科学院湖泊研究所国际湖泊学培训班研究项目 |
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| Measurement of Photosynthetic Rate of a Cultured Benthic Blue-green Alga:Tolypothrix sp. |
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CHEN Yu-wei1, Martin Dokulil2
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1.Nanjing institute of Geography and Limnology, Naming 210005, P. R. China;2.Institute of Limnology, A-5310 Mindare. Austria
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| Abstract: |
| Abstract Photosynthesis of a cultured benthic blue-green alga Tolypothrix sp. was measured under light and temperature conditions using oxygen light-dark bottle method and 14C light-dark bottle method. Respiratory rates of the alga were also measured at different temperatures. Photosynthetic rates increased with increasing temperatures. Respiratory rates did not show significant differences among different temperatures. Photosynthetic rates were almost the same under light intensities lower than 400μEm-2s-1.Comparing the oxygen and 14C method, the photosynthetic quotient Q (moles O2 per moles C) of Tolypothrix sp. in these experiments was about 1.11. The method for the measurement of photosynthesis of such kind of benthic alga was improved in this paper. |
| Key words: Tolypothrix sp. benthic alga photosynthesis temperature |
