![Figure 2. Diagram representing the juxtaposition -in two types of cells- of the C4 (mesophyll cells) and C3 (sheath cells) cycles in plants with C4 type metabolism (left). The C4 cycle enables CO2 to be concentrated in the vicinity of the RubisCO, thus promoting its carboxylase activity (Schéma Roger Prat, in Morot-Gaudry, Dunod, 2009). PGA, phosphoglyceric acid; RuBP, ribulose bisphosphate; PEP, phosphoenolpyruvate; HCO3-, bicarbonate. Right: Anatomy of a corn leaf section, a C4 plant. In light blue: chloroplasts of the mesophyll cells (C4); in blue-violet: chloroplasts of the perivascular sheath (C3). In the center, the cells of the conducting vessels. [Source: © Photo Frédéric Dubois, Université de Picardie]](https://foreverest.net/uploads/2024/06/figure-sustainability-_Diagram_representing_the_juxtaposition_-in_two_types_of_cells-_of_the_C4_and_C3_cycles_in_plants_with_C4_type_metabolism_7549.webp)
Figure 2. Diagram representing the juxtaposition -in two types of cells- of the C4 (mesophyll cells) and C3 (sheath cells) cycles in plants with C4 type metabolism (left). The C4 cycle enables CO2 to be concentrated in the vicinity of the RubisCO, thus promoting its carboxylase activity (Schéma Roger Prat, in Morot-Gaudry, Dunod, 2009). PGA, phosphoglyceric acid; RuBP, ribulose bisphosphate; PEP, phosphoenolpyruvate; HCO3-, bicarbonate. Right: Anatomy of a corn leaf section, a C4 plant. In light blue: chloroplasts of the mesophyll cells (C4); in blue-violet: chloroplasts of the perivascular sheath (C3). In the center, the cells of the conducting vessels. [Source: © Photo Frédéric Dubois, Université de Picardie]