Matuszynska 2016, BBA Bioenerg.

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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.

Scheme

Matuszynska 2016 scheme

Analysis

Model definition

Variables
SymbolIDInitial value
pq_red0
protons0.0000632975752
vmax_atp_synthase0
atp25
psbs_de1
vx1
Parameters
SymbolIDValue
PSII_tot2.5
PQ_tot20
AP_tot50
PsbS_tot1
X_tot1
O2_ex8
Pi0.01
k_Cytb6f0.104
k_ActATPase0.01
k_DeactATPase0.002
k_ATPsynth20
k_ATPconsum10
k_PQH2250
k_H5000000000
k_F625000000
k_P5000000000
k_PTOX0.01
pH_st7.8
k_leak1000
b_H100
hpr4.666666666666667
k_DV0.0024
k_EZ0.00024
K_pHSat5.8
nhx5
K_ZSat0.12
nhl3
k_deprot0.0096
k_prot0.0096
K_pHSatLHC5.8
gamma_00.1
gamma_10.25
gamma_20.6
gamma_30.15
F96.485
R0.0083
T298
E0_QA-0.14
E0_PQ0.354
E0_PC0.38
DG_ATP30.6
PPFD100
Derived quantities
SymbolIDEquation
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
Reactions
SymbolIDRateStoichiometry
v_PSII
v_PQ
atp_synthase
atp_activase
proton_leak
v_ATPcons
v_Xcyc
v_PsbSP

Curation

Curator's note

This model was validated by reproducing the following figures of the original publication.

Figures
Fig4
Page figure
Fig5
Page figure
Fig6
Page figure