Understanding how exogenous and endogenous factors and above-ground-below-ground linkages modulate carbon dynamics is difficult because of the influences of antecedent conditions. For example, there are variable lags between above-ground assimilation and below-ground efflux, and the duration of antecedent periods are often arbitrarily assigned. Nonetheless, developing models linking above- and ...

A factorial pot experiment was conducted based on randomized complete blocks design in green house condition to investigate the effect of short-term salt stress on leaf photosynthesis and ion relations of two sugar beet cultivars (Madison and 7233-P29). Plants were exposed to 0, 50, 150, 250, and 350 mM salinity (NaCl and CaCl2 in 5:1 molar ratio) for 48 hours. Measurements were done on younges...

Carbon dioxide (CO2) emissions to the atmosphere from running waters are estimated be four times greater than total carbon (C) flux oceans. However, these fluxes remain poorly constrained because of substantial spatial and temporal variability in dissolved CO2 concentrations. Using a global compilation high-frequency measurements, we demonstrate that nocturnal on average 27% (0.9 gC m?2 d?1) th...

Abstract The ability to maintain the balance between absorbed light energy and used in photosynthesis is a key factor of plant adaptation variable environmental conditions. In this work, diurnal variations photosynthesis, respiration, thermal dissipation, activity antioxidant system were studied hoary plantain ( Plantago media L.) growing on an open slope (sun plants) under natural shading herb...

Abstract. Cities have become increasingly interested in reducing their greenhouse gas emissions and increasing carbon sequestration storage urban vegetation soil as part of climate mitigation actions. However, most our knowledge the biogenic cycle is based on data models from forested ecosystems, despite nature microclimates differing greatly those natural or ecosystems. There a need for modell...