The article discusses the correlation between donors products of photosynthesis and their acceptors with particular emphasis on the metabolism of sucrose. Degrading enzymes have been characterized sucrose (invertase sucrose synthase) and the content of a metabolic regulator? fructose-2,6-bisphosphate and activity-dependent phosphofructokinase PPi. Also discussed the impact of environmental factors (temperature, salinity, drought, changes in mineral content, anaerobiosis, environmental pollution) on the metabolism of sucrose.