Composition and activity of external carbonic anhydrase of microalgae from karst lakes in China |
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| Authors: | Yanyou Wu Pingping Li Baoli Wang Congqiang Liu Mei He Chuan Chen |
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| Affiliation: | Institute of Agricultural Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013,;State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences 550002,;Guizhou Botanical Garden, Guizhou Academy of Sciences 550002, and;Department of Biological Science and Biotechnology, Guizhou Normal University, Guiyang 550001, China |
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| Abstract: | The species composition, the net photosynthetic O2 evolution rate and the activity of external carbonic anhydrase (CA) of microalgae from three reservoirs were studied. Carbonic anhydrase activity had a significant positive correlation with the density of Cyanobacteria in Lake Aha. Microalgae's carbonic anhydrase activity in Lakes Baihua and Hongfeng was related to the density of Chlorophyceae. The species abundances of microalgae in Lake Aha, Lake Baihua, and Lake Hongfeng were different. A relationship between carbonic anhydrase activity and net photosynthetic O2 evolution rate had also been established. Algae with external CA influenced the algal productivity. These results demonstrate the role of external CA in facilitating the availability of CO2 that limits the photosynthesis of microalgae in karst lakes in China. |
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| Keywords: | carbonic anhydrase Chlorophyceae Cyanobacteria karst microalgae net photosynthetic O2 evolution rate |
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