| Study of effects of environmental factors on biochemical compositions of four species of marine single-celled algae |
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| 作者姓名： | Li Wenquan Huang Xianmang Chen Qinghu Zheng Airong Wang Xian Cai Agen |
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| 作者单位： | 1. Department of Oceanography，Institute of Subtropical Oceanography，Xiamen University，Xiamen 361005，China |
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| 基金项目： | the Natural Science Foundation of Fujian Province under contract! No. D92001. |
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| 摘 要： | INTRODUCTIONThecontentsandtheirvariationofcellularbiochemicalcomponentsinnormallygrowingmarinealgaereflectthedifferenceinecologicalenvironments,reportedbymanyresearchers(MomsandSkea,1978;SmithandMoms,1980;LiandHarrison,1982;SmithandGeider,1985;Yangetal.,1991,1992).Lightintensity,temperatureandnutrientsaremostimPOrtantenvironmentalfactorsintheocean.ThispaperemphasizestheeffectsofenvironmentalfactorsonthecompositionofPhaendactylumtricornutum,Dunaliellaspp.,SkeletonemacostatumandIsOChr…
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| 关 键 词： | Single-celled algae biochemical composition environmental factor |
| 收稿时间： | 1998/11/9 0:00:00 |
| 修稿时间： | 4/5/1999 12:00:00 AM |
Study of effects of environmental factors on biochemical compositions of four species of marine single-celled algae |
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| Li Wenquan,Huang Xianmang,Chen Qinghu,Zheng Airong,Wang Xian,Cai Agen.Study of effects of environmental factors on biochemical compositions of four species of marine single-celled algae[J].Acta Oceanologica Sinica,2000,19(1):69-77. |
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| Authors: | Li Wenquan Huang Xianmang Chen Qinghu Zheng Airong Wang Xian and Cai Agen |
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| Institution: | Department of Oceanography, Institute of Subtropical Oceanography, Xiamen University, Xiamen 361005, China |
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| Abstract: | Photosynthetic rates (PR ) of four species of marine single- celled algae were determined by means of 14C-tracer method under the experimental modelling conditions. The effects of environmental factors, such as light, temperature and nutrients, on the biochemical compositions of the algae were studied. The results indicate that the suitable light intensities for the growth of Phaeodactylum tricorntum, Dunaliella spp, Skeletonema costatum and Isochrysis galbana are in the range from 5. 8 X 103 to 15 x 103 lx, showing an increasing trend of photosynthetic rates with the heightened light intensities. The irradiance response of Dunaliella spp. and Isochrysis galbana is significant. The contents of carbohydrate increase, but those of protein decrease, and the contents of lipids change very little. The optimum temperatures for the growth of the four species of algae are 14, 26, 21 and 26t respectively, characterized by the maxima of PR and the contents of carbohydrate, protein and lipid as well as their variations. The apparent activation energies in the photosynthesis process of Phaeodactylum tricornutum, Dunaliella spp., Skeletonema costatum and Isochrysis galbana are 23. 2, 38. 5, 22. 4 and 61. 7 kJ/mol respectively, and the temperature coefficients for the four algae are 1. 74, 1. 74, 1. 38 and 1. 69 respectively. The peaks of PR appeared in some culture media (N/P = 16 ) of Phaeodactylum tricornutum and Skeletonema costatum, and in other media (N/P = 28) of Dunaliella spp. and Isochurysis galbana. The contents and their variations of carbohydrate, protein and lipid of the four species of algae are all maximum when N/P is equal to 16 in culture media. |
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| Keywords: | Single-celled algae biochemical composition environmental factor |
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