Response of cyanobacterial carbon concentrating system to light intensity: a simulated analysis
文献类型：期刊论文
| 作者 | Fu Xiang1,2,3; Han Boping1 |
| 刊名 | CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
 |
| 出版日期 | 2010-05-10 |
| 卷号 | 28期号:3页码:478-488 |
| 关键词 | Co(2) Concentrating Mechanism Model Light Intensity Inorganic Carbon Transport |
| ISSN号 | 0254-4059 |
| DOI | 10.1007/s00343-010-9046-x |
| 文献子类 | Article |
| 英文摘要 | Cyanobacteria possess a delicate system known as the carbon concentrating mechanism (CCM), which can efficiently elevate the intracellular inorganic carbon (Ci) concentration via active transportation. The system requires energy supplied by photosystems; therefore, the activity of the Ci transporter is closely related to light intensity. However, the relationship between CCM and light intensity has rarely been evaluated. Here, we present an improved quantitative model of CCM in which light is incorporated, and developed a CCM model that modified after Fridlyand et al. in 1996. Some equations used in this model were inducted to describe the relationship between transport capacity and light intensity, by which the response of the CCM to light change is simulated. Our results indicate that the efficiency of the carbon concentrating system is sensitive to light intensity. When the external Ci concentration was low, CO(2) uptake dominated the total Ci uptake with increasing light intensity, while under high external Ci concentrations HCO(3)(-) uptake primarily contributed to the total Ci uptake. Variations in the ratio of energy allocated between the transport systems could markedly affect the operation of CCM. Indeed, our simulations suggest that various combinations of Ci fluxes can provide a possible approach to detect the way by which the cell distributes energy produced by the photosystems to the two active Ci transport processes. The proportion of the energy consumed on CCM to the total energy expenditure for the fixation of one CO(2) molecule was determined at 18%-40%.; Cyanobacteria possess a delicate system known as the carbon concentrating mechanism (CCM), which can efficiently elevate the intracellular inorganic carbon (Ci) concentration via active transportation. The system requires energy supplied by photosystems; therefore, the activity of the Ci transporter is closely related to light intensity. However, the relationship between CCM and light intensity has rarely been evaluated. Here, we present an improved quantitative model of CCM in which light is incorporated, and developed a CCM model that modified after Fridlyand et al. in 1996. Some equations used in this model were inducted to describe the relationship between transport capacity and light intensity, by which the response of the CCM to light change is simulated. Our results indicate that the efficiency of the carbon concentrating system is sensitive to light intensity. When the external Ci concentration was low, CO2 uptake dominated the total Ci uptake with increasing light intensity, while under high external Ci concentrations HCO3- uptake primarily contributed to the total Ci uptake. Variations in the ratio of energy allocated between the transport systems could markedly affect the operation of CCM. Indeed, our simulations suggest that various combinations of Ci fluxes can provide a possible approach to detect the way by which the cell distributes energy produced by the photosystems to the two active Ci transport processes. The proportion of the energy consumed on CCM to the total energy expenditure for the fixation of one CO2 molecule was determined at 18%-40%. |
| 学科主题 | Limnology ; Oceanography |
| URL标识 | 查看原文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000278924100007 |
| 公开日期 | 2010-12-24 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/5425]  |
| 专题 | 海洋研究所_海洋生态与环境科学重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China 3.SOA, Inst Oceanog 2, Hangzhou 310012, Zhejiang, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fu Xiang,Han Boping. Response of cyanobacterial carbon concentrating system to light intensity: a simulated analysis[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2010,28(3):478-488. |
| APA | Fu Xiang,&Han Boping.(2010).Response of cyanobacterial carbon concentrating system to light intensity: a simulated analysis.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,28(3),478-488. |
| MLA | Fu Xiang,et al."Response of cyanobacterial carbon concentrating system to light intensity: a simulated analysis".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 28.3(2010):478-488. |
入库方式： OAI收割
来源：海洋研究所
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