Figure 4

Schematic diagram of the sucrose accumulation model of sugar cane culm tissue. Abbreviations are as follows Suc: sucrose; Suc6P: sucrose-6-phosphate; HexP (Hexose phosphates); Fru: fructose; Glc: glucose. The subscript ‘ex’ stands for extracellular and the subscript ‘vac’ stands for vacuolar. The numbered V’s denote the reactions which are represented by rate laws. The reactions are V₁: Fructose (Fru) uptake; V₂: Glucose (Glc) uptake; V₃: Hexokinase (Glc); V₄: Hexokinase (Fru phosphorylating); V₅: Fructokinase; V₆: Sucrose phosphate synthase; V₇: Sucrose phosphate phosphatase; V₈: Sucrose synthase; V₉: Invertase; V₁₀: Glycolysis; V₁₁: Vacuolar sucrose import.