Exact(4)
This difference cannot be explained as carbon starvation, as multiple sugar transporters were expressed much more highly in L-arabinose than that in the no carbon condition.
The minimum value is observed in the diversity graphs of acetate and glycolate, due to their star topology and the maximum value corresponds to the carbon condition L- asparagine.
Extracellular carbohydrate is one main component of EPS [ 17, 18], and the above results showed that a low influent organic carbon condition induced a high extracellular carbohydrate production, which might be due to the fact that EPS production was a response to low nutrient condition as a protective mechanism for experiencing unfavourable low organic carbon conditions.
Although the fungus response to L-arabinose had significant overlap with carbon starvation (no carbon condition) [ 34], especially the downregulated genes, there were significant differences and a wider range of gene induction was found by L-arabinose compared to carbon starvation, particularly the sugar transporters, hemicellulase genes and transcription factors.
Similar(56)
Optimal growth was achieved at mixotrophic carbon conditions (0.353 d−1) and the highest NH4+-N concentration (0.357 d−1), with preferable NH4+-N utilization rather than NO3−-N.
Furthermore, sucrose was mobilised when the cells were shifted back to lower carbon conditions.
However, as discussed in earlier separate sections, under limiting oxygen and carbon conditions CH34 will degrade short-chain fatty acids, dicarboxylated compounds, or energy-storage products, such as polyhydroxybutyrate (PHB).
High external inorganic carbon conditions produce slightly higher net HCO 3 − rates (Tchernov et al., 1997).
Under adequate organic carbon conditions, microorganisms will experience excess biomass production and endogenous respiration is not obvious.
At low external inorganic carbon conditions, internal inorganic carbon pools due to CCM activity are regularly measured as high as Ci = 30 mM.
The rewired metabolic response to L-arabinose was significantly different and wider than that under no carbon conditions, although the carbon starvation response was initiated on L-arabinose.
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