Models / Matuszyńska 2016

Matuszyńska 2016 PhD model

The Matuszyńska 2016 PhD model extends the NPQ model into a fuller chloroplast description by adding photosystem I electron transport (P700, ferredoxin, NADPH) and explicit lumenal pH dynamics. A carotenoid pool and LHC antenna switching couple photoprotection to the redox state of both photosystems.

Like its predecessor it supports PAM fluorescence protocols, thereby linking the fast photoprotective response to the broader electron-transport state of the thylakoid.

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Generated LaTeX Code

\begin{align*}
  \frac{d atp}{dt} &= kf\_atp\_synthase \cdot (adp - \frac{atp}{keq\_atp\_synthase}) \\
  & - atp \cdot kf\_ex\_atp \\ 
  \frac{d pq\_ox}{dt} &= \max(- kcat\_b6f, kcat\_b6f \cdot (pq\_red \cdot {pc\_ox}^{2} - \frac{pq\_ox \cdot {pc\_red}^{2}}{keq\_b6f})) \\
  & - kf\_cyclic\_electron\_flow \cdot pq\_ox \cdot {fd\_red}^{2} \\
  & - kf\_ndh \cdot pq\_ox - 0.5 \cdot ps2states \cdot k2 \\
  & + O2\_lumen \cdot kPTOX \cdot pq\_red \\ 
  \frac{d pc\_ox}{dt} &= - 2 \cdot \max(- kcat\_b6f, kcat\_b6f \cdot (pq\_red \cdot {pc\_ox}^{2} - \frac{pq\_ox \cdot {pc\_red}^{2}}{keq\_b6f})) \\
  & + A1 \cdot PPFD \cdot (1 - PSII\_cross\_section) \\ 
  \frac{d fd\_ox}{dt} &= 2 \cdot kf\_cyclic\_electron\_flow \cdot pq\_ox \cdot {fd\_red}^{2} \\
  & + 2 \cdot \frac{vmax\_fnr \cdot (\frac{nadp \cdot {\frac{fd\_red}{km\_fnr\_fd\_red}}^{2}}{km\_fnr\_nadp} - \frac{nadph \cdot {\frac{fd\_ox}{km\_fnr\_fd\_red}}^{2}}{keq\_fnr \cdot km\_fnr\_nadp})}{-1 + (1 + \frac{nadp}{km\_fnr\_nadp}) \cdot (1 + {\frac{fd\_red}{km\_fnr\_fd\_red}}^{2} + \frac{fd\_red}{km\_fnr\_fd\_red}) + (1 + \frac{nadph}{km\_fnr\_nadp}) \cdot (1 + {\frac{fd\_ox}{km\_fnr\_fd\_red}}^{2} + \frac{fd\_ox}{km\_fnr\_fd\_red})} \\
  & - A1 \cdot PPFD \cdot (1 - PSII\_cross\_section) \\ 
  \frac{d protons\_lumen}{dt} &= - \frac{HPR}{bH} \cdot kf\_atp\_synthase \cdot (adp - \frac{atp}{keq\_atp\_synthase}) \\
  & + \frac{4}{bH} \cdot \max(- kcat\_b6f, kcat\_b6f \cdot (pq\_red \cdot {pc\_ox}^{2} - \frac{pq\_ox \cdot {pc\_red}^{2}}{keq\_b6f})) \\
  & + \frac{2}{bH} \cdot 0.5 \cdot ps2states \cdot k2 \\
  & - \frac{1}{bH} \cdot kf\_proton\_leak \cdot (protons\_lumen - 4000 \cdot {10}^{- pH}) \\ 
  \frac{d lhc}{dt} &= - \frac{1 \cdot kStt7 \cdot lhc}{1 + {\frac{pq\_ox}{PQ\_tot \cdot km\_lhc\_state\_transition\_12}}^{n\_ST}} \\
  & + kPph1 \cdot lhc\_prot \\ 
  \frac{d psbs\_de}{dt} &= - \frac{kf\_lhc\_protonation \cdot psbs\_de \cdot {protons\_lumen}^{kh\_lhc\_protonation}}{{protons\_lumen}^{kh\_lhc\_protonation} + {4000 \cdot {10}^{- ksat\_lhc\_protonation}}^{kh\_lhc\_protonation}} \\
  & + kf\_lhc\_deprotonation \cdot psbs\_pr \\ 
  \frac{d vx}{dt} &= - \frac{kf\_violaxanthin\_deepoxidase \cdot vx \cdot {protons\_lumen}^{kh\_violaxanthin\_deepoxidase}}{{protons\_lumen}^{kh\_violaxanthin\_deepoxidase} + {4000 \cdot {10}^{- ksat\_violaxanthin\_deepoxidase}}^{kh\_violaxanthin\_deepoxidase}} \\
  & + kf\_zeaxanthin\_epoxidase \cdot zx
\end{align*}

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