Fig. 2
Schematic description of constraints used with the multi-tissue model to simulate the production of cellulose, hemi-cellulose (XLFG-Xyloglucan) and lignin (Sinap, sinapyl alcohol; Conol, coniferyl alcohol and Coumol, coumaryl alcohol) in stem. Gaseous exchanges of CO2 and O2 from environment were allowed from M and S cell types. All other mineral nutrients and water uptake were only allowed through S that can be distributed to BS and M (dashed linked arrow). Photon influx was allowed into both M and BS. Under two different case scenarios, model was either restricted (P B) or allowed to exchange H + from environment in the three cell types. This figure only illustrates P B condition. Four carbon compounds, Pyr, 3-PGA, DHAP and Mal were allowed to transport between M and BS cells. O2 evolution to environment directly from BS was restricted but its exchange with M was allowed. Sucrose was allowed to transport from BS to S. Input of mineral nutrients from the external environment are shown (rectangle box), however only water was utilized under this simulation