Balancing energy supply during photosynthesis - a theoretical perspective
| Autor: | Anna Matuszyńska, Nima P. Saadat, Oliver Ebenhoeh |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
0301 basic medicine Photosynthetic electron transport chain Special Issue: Photosynthesis Physiology Carbon fixation Special Issue Article Cell Biology Plant Science General Medicine Models Theoretical Photosynthesis 01 natural sciences Redox Carbon Cycle Electron Transport 03 medical and health sciences 030104 developmental biology Photosynthetic Carbon Fixation Genetics Environmental science Energy supply Biochemical engineering 010606 plant biology & botany |
| Zdroj: | Physiologia Plantarum |
| ISSN: | 1399-3054 |
| Popis: | The photosynthetic electron transport chain (PETC) provides energy and redox equivalents for carbon fixation by the Calvin-Benson-Bassham (CBB) cycle. Both of these processes have been thoroughly investigated and the underlying molecular mechanisms are well known. However, it is far from understood by which mechanisms it is ensured that energy and redox supply by photosynthesis matches the demand of the downstream processes. Here, we deliver a theoretical analysis to quantitatively study the supply-demand regulation in photosynthesis. For this, we connect two previously developed models, one describing the PETC, originally developed to study non-photochemical quenching, and one providing a dynamic description of the photosynthetic carbon fixation in C3 plants, the CBB Cycle. The merged model explains how a tight regulation of supply and demand reactions leads to efficient carbon fixation. The model further illustrates that a stand-by mode is necessary in the dark to ensure that the carbon fixation cycle can be restarted after dark-light transitions, and it supports hypotheses, which reactions are responsible to generate such mode in vivo. |
| Databáze: | OpenAIRE |
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