A Microscale Model for Combined CO2 Diffusion and Photosynthesis in Leaves
Figure 8
Reconstructed microscale geometry based on microscopic images of wheat leaf tissue and scheme of fluxes of CO2 species through different compartments of the mesophyll cell.
(A) Reconstructed microscale geometry based on microscopic images of wheat leaf tissue [35]. The adaxial surface is at the bottom. E, epidermis; I, intercellular space; M, mesophyll cell; P, phloem; and X, xylem. (B) Detail of reconstructed mesophyll cells in computer model. Chl, chloroplast layer; Cyto, cytoplasm; Cw, cell wall; Vac, vacuole.(C) Scheme of fluxes of CO2 species through different compartments of the mesophyll cell and corresponding resistances. The resistances due to the epidermis, stomata and intercellular space are not included in this scheme. The symbols C and r indicate CO2concentration and resistance, respectively. The subscripts i, w, cyto, c, vac and mem indicate intercellular space, cell wall, cytoplasm, chloroplast, vacuole and membrane, respectively. The resistance of double membrane- chloroplast envelope was modeled as twice the resistance of the phospholipid membrane. AG is the gross photosynthesis rate; Rd is respiration.