The Matuszynska 2016 model, a small kinetic model, was developed to delve deeper into the effect of light memory caused by non-photochemical quenching. The systematic investigation of the Xanthophyll cycle, a combination of the pigments of violaxanthin, antheraxanthin, and zeaxanthin, sparked a series of experiments to determine whether plant light memory can be detected in a time-scale of minutes to hours through pulse amplitude modulated chlorophyll fluorescence. The model was then created based on these experimental results, providing a comprehensive description of NPQ dynamics and the short-term memory of the Arabidopsis thaliana plant.
To keep the model as simple as possible, several processes not directly linked to NPQ have been simplified to create a dynamic ODE system consisting only of 6 different compounds. With these simplifications, the authors could fulfil an additional goal: to make a general framework that is not specific to one model organism.
To demonstrate the adaptability of their model, the authors took their calibrated Arabidopsis thaliana model and successfully applied it to the non-model organism Epipremnum aureum. This adaptation allowed them to simulate realistic fluorescence measurements and replicate all the key features of chlorophyll induction, showcasing the model's versatility and potential for use in a variety of organisms.
| Symbol | ID | Initial value |
|---|---|---|
| pq_red | 0 | |
| protons | 0.0000632975752 | |
| vmax_atp_synthase | 0 | |
| atp | 25 | |
| psbs_de | 1 | |
| vx | 1 |
| Symbol | ID | Value |
|---|---|---|
| PSII_tot | 2.5 | |
| PQ_tot | 20 | |
| AP_tot | 50 | |
| PsbS_tot | 1 | |
| X_tot | 1 | |
| O2_ex | 8 | |
| Pi | 0.01 | |
| k_Cytb6f | 0.104 | |
| k_ActATPase | 0.01 | |
| k_DeactATPase | 0.002 | |
| k_ATPsynth | 20 | |
| k_ATPconsum | 10 | |
| k_PQH2 | 250 | |
| k_H | 5000000000 | |
| k_F | 625000000 | |
| k_P | 5000000000 | |
| k_PTOX | 0.01 | |
| pH_st | 7.8 | |
| k_leak | 1000 | |
| b_H | 100 | |
| hpr | 4.666666666666667 | |
| k_DV | 0.0024 | |
| k_EZ | 0.00024 | |
| K_pHSat | 5.8 | |
| nhx | 5 | |
| K_ZSat | 0.12 | |
| nhl | 3 | |
| k_deprot | 0.0096 | |
| k_prot | 0.0096 | |
| K_pHSatLHC | 5.8 | |
| gamma_0 | 0.1 | |
| gamma_1 | 0.25 | |
| gamma_2 | 0.6 | |
| gamma_3 | 0.15 | |
| F | 96.485 | |
| R | 0.0083 | |
| T | 298 | |
| E0_QA | -0.14 | |
| E0_PQ | 0.354 | |
| E0_PC | 0.38 | |
| DG_ATP | 30.6 | |
| PPFD | 100 |
| Symbol | ID | Equation |
|---|---|---|
| pH_lu | ||
| H_st | ||
| K_pHSat_inv | ||
| K_pHSatLHC_inv | ||
| K_QAPQ | ||
| K_cytb6f | ||
| K_ATPsynth | ||
| pq_ox | ||
| adp | ||
| psbs_pr | ||
| zx | ||
| Q | ||
| Fluo | ||
| B0 | ||
| B1 | ||
| B2 | ||
| B3 |
| Symbol | ID | Rate | Stoichiometry |
|---|---|---|---|
| v_PSII | |||
| v_PQ | |||
| atp_synthase | |||
| atp_activase | |||
| proton_leak | |||
| v_ATPcons | |||
| v_Xcyc | |||
| v_PsbSP |
This model was validated by reproducing the following figures of the original publication.