Higher levels of Rubisco proteins in TSS-AVRDC-2 could lead to increased carbon fixation efficiency to provide sufficient energy to enable stress tolerance under waterlogging at 40 °C.
This contribution reviews CO2-fixation in cyanobacteria with focus on CO2-concentrating mechanisms, RuBisCO, phosphoenolpyruvate carboxylase and other carboxylases, engineering approaches for increased carbon fixation, and finally the synthetic malonyl-CoA-oxaloacetate-glyoxylate pathways.
To explain the interacting effects of light and phosphorus on the sterol contents of the algae, we propose that at high light intensities the increased carbon fixation also allows an increased synthesis of sterols.
Furthermore, the inhibition of light harvesting under N deprivation indicates that high light intensity is not required for lipid accumulation, and the increase in carbon fixation suggests that increasing CO2 supplies during this stage should be advantageous.
This will require an increase in carbon fixation through photosynthesis, which in turn is dependent on radiation use efficiency (RUEPAR).
Hence, findings shed light on mechanisms, namely an acceleration of cell senescence in foliage and changed carbon sink at a cellular level threatening the potential increase of carbon fixation in the foliage of trees within a CO2-richer environment in the future.
Microarray analyses have shown that GPT2 expression has been associated with impaired carbon metabolism (Kunz et al., 2010), senescence (Pourtau et al., 2006) and increases in carbon fixation due to increased light (Athanasiou et al., 2010).
The down regulation of the three main components of glycolysis suggests soybean, unlike Arabidopsis, does not increase non photosynthetic carbon fixation or phosphoenolpyruvate carboxylase activity under iron stressed conditions.
An inverse growth response to summer temperatures is common in trees because higher temperatures tend to facilitate internal water deficits and increased respiration over carbon fixation (Edwards and Dixon 1995; Henderson and Grissino-Mayer 2009).
Moreover, an increased CO2 concentration within CAM plant cells increases the efficiency of carbon fixation by Rubisco [ 2].
