In this sense, contrasting with other high-elevation plants, which show a more conservative strategy such as Lobelia rhynchopetalum (Fetene et al. 1997), the photosynthetic apparatus is remarkably well adapted to cope with low temperatures, and the maximum rates of carbon assimilation are remarkably high.
The sensitivity of the model to two critical but uncertain parameters, the maximum carboxylation capacity Vcmo, and a stomatal parameter λ (the marginal water cost of carbon assimilation) is discussed; it is shown that anisotropy displays limited sensitivity to both parameters for the experimental conditions met over a well-watered wheat field.
Radioactive isotopes of carbon (14C) and phosphorus (32P) have been valuable in identifying the intermediate compounds formed during carbon assimilation.
The formation of normal chloroplasts is crucial for photosynthesis and carbon assimilation in plants.
As a result, stomatal regulation caused restricted carbon assimilation per unit leaf area.
Aerosols alter sunlight that reaches vegetation, affecting carbon assimilation and transpiration.
However, water use and carbon assimilation are difficult to quantify at the ecosystem scale.
Thus, summer drought can reduce the carbon assimilation because of RD rates increasing more than PN rates.
In particular, under nitrogen (N -limitation, αKG accumulates due to decreased activity of glutamate dehydrogeN -limitationd inhibits carbon assimilation, where there is less need for carbon-catabolic enzymes, and more demand for those involved in such nutrient assimilation.
Elevated temperatures will also increase photorespiration and heterotrophic respiration and, in turn, reduce carbon assimilation (Long 1991).
