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The computational analysis of the model system consisting of the processes of CO 2 assimilation and photorespiration shows the appearance of sustained oscillations in the system which might reflect their presence in photosynthesizing cells. Concentrations of CO 2 and O 2 oscillate in opposite...
In closed systems, the O 2 compensation point ( Γ O ) was previously defined as the upper limit of O 2 level, at a given CO 2 level, above which plants cannot have positive carbon balance and survive. Studies with 18 O 2 measure the actual O 2 uptake by photorespiration due to the dual function...
E-photosynthesis framework is a web-based platform for modeling and analysis of photosynthetic processes. Compared to its earlier version, the present platform employs advanced software methods and technologies to support an effective implementation of vastly diverse kinetic models of...
Photosynthesis is the origin of oxygenic life on the planet, and its models are the core of all models of plant biology, agriculture, environmental quality and global climate change. A theory is presented here, based on single process biochemical reactions of Rubisco, recognizing that: In the...
Seeds are generally viewed in the context of plant reproduction and the supply of food and feed, but only seldom as a site of photosynthesis. However, the seeds of many plant species are green, at least during their early development, which raises the issue of the significance of this greening...
Rates of carbon fluxes and pool sizes of photosynthetic metabolites in different cellular compartments of barley protoplasts were calculated from the time curves of their labeling in the medium of 14 CO 2 . Using membrane filtration procedure, kinetics of 14 C incorporation into the products of...
Stable operation of photosynthesis is based on the establishment of local equilibria of metabolites in the Calvin cycle. This concerns especially equilibration of stromal contents of adenylates and pyridine nucleotides and buffering of CO 2 concentration to prevent its depletion at the sites of...
The studies of Rubisco characteristics observed during plant evolution show that the variation of the Rubisco specificity factor only improved by two times from cyanobacteria to modern C3 plants. However we note important variations of the ratio between the maximum rates of oxygenation and...
To understand what governs the patterns of net ecosystem exchange of CO 2 , an understanding of factors influencing the component fluxes, ecosystem respiration and gross primary production is needed. In the present paper, we introduce an alternative method for estimating daytime ecosystem...
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