| Li Wenquan,Huang Xianmang,Chen Qinghua,Zheng Airong,Wang Xian,Cai Agen. 2000. Study of effects of environmental factors on biochemical compositions of four species of marine single-celled algae. Acta Oceanologica Sinica, (1):69－77 |
| Study of effects of environmental factors on biochemical compositions of four species of marine single-celled algae |
| Study of effects of environmental factors on biochemical compositions of four species of marine single-celled algae |
| Received:November 09, 1998 Revised:April 05, 1999 |
| DOI： |
| Key words:Single-celled algae biochemical composition environmental factor |
| 中文关键词: Single-celled algae biochemical composition environmental factor |
| 基金项目:This project was supported by the Natural Science Foundation of Fujian Province under contract No. D92001. |
| Author Name | Affiliation | | Li Wenquan | Department of Oceanography, Institute of Subtropical Oceanography, Xiamen University, Xiamen 361005, China | | Huang Xianmang | Department of Oceanography, Institute of Subtropical Oceanography, Xiamen University, Xiamen 361005, China | | Chen Qinghua | Department of Oceanography, Institute of Subtropical Oceanography, Xiamen University, Xiamen 361005, China | | Zheng Airong | Department of Oceanography, Institute of Subtropical Oceanography, Xiamen University, Xiamen 361005, China | | Wang Xian | Department of Oceanography, Institute of Subtropical Oceanography, Xiamen University, Xiamen 361005, China | | Cai Agen | 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 Phaeodactyum tricornutum, Dunaliella spp.,Skeletonema costatum and Isochrysis galbana are in the range from 5.8×103 to 15×103lx, 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 26℃ 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 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 Isochrysis galbana 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. |
| 中文摘要: |
| 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 Phaeodactyum tricornutum, Dunaliella spp.,Skeletonema costatum and Isochrysis galbana are in the range from 5.8×103 to 15×103lx, 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 26℃ 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 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 Isochrysis galbana 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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