| Zheng Airong,Chen Cimei,Zhou Ciyoul,Chen Yuzhou. 1998. Effects of iron on growth, degree of pigmentization and nitrogen assimilation in Skeletonema costatum. Acta Oceanologica Sinica, (2):187－196 |
| Effects of iron on growth, degree of pigmentization and nitrogen assimilation in Skeletonema costatum |
| Effects of iron on growth, degree of pigmentization and nitrogen assimilation in Skeletonema costatum |
| Received:August 24, 1995 Revised:December 26, 1996 |
| DOI： |
| Key words:Skeletonema costatum iron biochemical component nitrogen assimilation pigmentization |
| 中文关键词: Skeletonema costatum iron biochemical component nitrogen assimilation pigmentization |
| 基金项目: |
| Author Name | Affiliation | | Zheng Airong | Department of Oceanography, Xiamen University, Xiamen 3610115, China | | Chen Cimei | Department of Oceanography, Xiamen University, Xiamen 3610115, China | | Zhou Ciyoul | Department of Oceanography, Xiamen University, Xiamen 3610115, China | | Chen Yuzhou | Department of Oceanography, Xiamen University, Xiamen 3610115, China |
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| Abstract: |
| The effects of iron and the interaction between iron and nitrogen on the growth, degree of pigmentization and nitrogen assimilation of S. costaturn are studied. The results show that with the increase of iron concentration from 3×10-8 to 5×10-6 mol/dm3, nitrogen uptake and assimilation by the alga increased, the degree of cytopigmentization reduced, and content of intracellular amino acid (PAA) and protein raised (Pr).Cell growth rate was the highest at 5×10-6 mol/dm3 Fe Chlorophyll a, thaeo-pigments, PAA and Pr were all related to logarithmic iron concentration. It was also found that the interaction between iron and nitrogen had a marked effect on the growth, degree of pigmentization and nitrogen assimilation at N/P=20:1 (by comparison with N/P=40:1 and 10:1).At given iron concentration, the effects of different specific N source on the rate of transferring PAA to Pr at the N source of lower oxidized state were more marked than at the N source of higher oxidized state. |
| 中文摘要: |
| The effects of iron and the interaction between iron and nitrogen on the growth, degree of pigmentization and nitrogen assimilation of S. costaturn are studied. The results show that with the increase of iron concentration from 3×10-8 to 5×10-6 mol/dm3, nitrogen uptake and assimilation by the alga increased, the degree of cytopigmentization reduced, and content of intracellular amino acid (PAA) and protein raised (Pr).Cell growth rate was the highest at 5×10-6 mol/dm3 Fe Chlorophyll a, thaeo-pigments, PAA and Pr were all related to logarithmic iron concentration. It was also found that the interaction between iron and nitrogen had a marked effect on the growth, degree of pigmentization and nitrogen assimilation at N/P=20:1 (by comparison with N/P=40:1 and 10:1).At given iron concentration, the effects of different specific N source on the rate of transferring PAA to Pr at the N source of lower oxidized state were more marked than at the N source of higher oxidized state. |
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