Response of cyanobacterial carbon concentrating system to light intensity:a simulated analysis
文献类型：CNKI期刊论文
| 作者 | Fu X(付翔); Han BP(韩博平) |
| 发表日期 | 2010-05-15 |
| 出处 | Chinese Journal of Oceanology and Limnology
 |
| 关键词 | CO2 concentrating mechanism model light intensity inorganic carbon transport |
| 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 a1. 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 HCOˉ3 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%. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | Supported by National Special Research Programs for Non-Profit Trades (Oceanography) (No.200705024) ; the Knowledge Innovation Program of Chinese Academy of Sciences (No.KZCX3-SW-214) |
| 卷 | v.28期:03页:54-64 |
| 语种 | 英文; |
| 分类号 | Q945 |
| ISSN号 | 0254-4059 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/192123]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.InstituteofOceanology,ChineseAcademyofSciences 2.TheSecondInstituteofOceanography 3.GraduateUniversity,ChineseAcademyofSciences |
| 推荐引用方式 GB/T 7714 | Fu X,Han BP. Response of cyanobacterial carbon concentrating system to light intensity:a simulated analysis. 2010. |
入库方式： OAI收割
来源：海洋研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。