...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Biophysical Chemistry: An International Journal Devoted to the Physical Chemistry of Biological Phenomena >Regulation of photosynthesis by ion channels in cyanobacteria and higher plants
【24h】

Regulation of photosynthesis by ion channels in cyanobacteria and higher plants

机译：蓝细菌和高等植物中离子通道对光合作用的调节

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Photosynthesis converts light energy into chemical energy, and supplies ATP and NADPH for CO2 fixation into carbohydrates and for the synthesis of several compounds which are essential for autotrophic growth. Oxygenic photosynthesis takes place in thylakoid membranes of chloroplasts and photosynthetic prokaryote cyanobacteria. An ancestral photoautotrophic prokaryote related to cyanobacteria has been proposed to give rise to chloroplasts of plants and algae through an endosymbiotic event. Indeed, photosynthetic complexes involved in the electron transport coupled to H+ translocation and ATP synthesis are similar in higher plants and cyanobacteria. Furthermore, some of the protein and solute/ion conducting machineries also share common structure and function. Elec-trophysiological and biochemical evidence support the existence of ion channels in the thylakoid membrane in both types of organisms. By allowing specific ion fluxes across thylakoid membranes, ion channels have been hypothesized to either directly or indirectly regulate photosynthesis, by modulating the proton motive force. Recent molecular identification of some of the thylakoid-located channels allowed to obtain genetic proof in favor of such hypothesis. Furthermore, some ion channels of the envelope membrane in chloroplasts have also been shown to impact on this light-driven process. Here we give an overview of thylakoid/chloroplast located ion channels of higher plants and of cyanobacterium Synechocystis sp. PCC 6803. We focus on channels shown to be implicated in the regulation of photosynthesis and discuss the possible mechanisms of action.
机译：光合作用将光能转换为化学能，并提供ATP和NADPH用于将CO2固定为碳水化合物以及用于合成几种对自养生长至关重要的化合物。氧合光合作用发生在叶绿体类囊体膜和光合原核生物蓝细菌中。已提出与蓝细菌有关的祖先光自养原核生物通过内共生事件产生植物和藻类的叶绿体。的确，在高等植物和蓝细菌中，涉及与H +易位和ATP合成相关的电子传输的光合复合物相似。此外，某些蛋白质和溶质/离子传导机制也具有共同的结构和功能。电生理和生化证据支持两种生物体类囊体膜中存在离子通道。通过允许类囊体膜上的特定离子通量，已假设离子通道通过调节质子原动力直接或间接调节光合作用。最近对一些类囊体定位通道的分子鉴定使得能够获得支持这种假设的遗传证据。此外，叶绿体中包膜的一些离子通道也已显示出对该光驱动过程的影响。在这里，我们给出了高等植物和蓝藻集胞藻属的类囊体/叶绿体离子通道的概述。 PCC6803。我们重点研究显示与光合作用调控有关的通道，并讨论可能的作用机理。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号