Photosynthetica - Ahead of Print
Spectral light quality differentially modulates PSII energy partitioning among soybean genotypes
M. MARTÍNEZ-MORÉ, S. SIMONDI, M.M. SAINZ, V. BONNECARRÈRE, S. FERNÁNDEZ, G. QUERO
Photosynthetica X:X | DOI: 10.32615/ps.2025.029 
Cultivated soybean is a globally important crop; understanding its responses to different light spectra within the canopy is essential, especially considering the limited agricultural area. Energy flux and spectral quality are key components of the light environment that determine photosynthesis and, consequently, plant growth. These factors influence the composition and structure of photosystem II, thereby affecting energy partitioning between photochemical and nonphotochemical processes. This study evaluated the photosynthetic performance of two soybean genotypes under four light environments with distinct spectral compositions but equal energy flux....
Characterizing the CO2-response curve in photosynthesis and photorespiration: an innovative model for C3 plant species
H.-J. KANG, T. AN, X.-L. YANG, Z.-P. YE, F.-B. WANG
Photosynthetica X:X | DOI: 10.32615/ps.2025.030
We introduce a novel model for characterizing the CO₂-response curve in photosynthesis, addressing the limitations of the Farquhar-von Caemmerer-Berry (FvCB) model by providing a more comprehensive framework for understanding photosynthetic responses to varying CO2 concentrations in C3 plants. The FvCB model, while instrumental in interpreting the photosynthetic response to CO2, does not directly estimate critical parameters such as maximum net photosynthetic rate, transit point from RuBP- to TPU-limited photosynthesis, and the CO2 compensation point in the presence of day respiration (Rday)....
Additional far-red light improves the growth and resistance of the photosynthetic apparatus of Lactuca sativa L. to high-intensity light
V.D. KRESLAVSKI, P.P. PASHKOVSKIY, A.N. SHMAREV, A.Yu. KHUDYAKOVA, V.V. STROKINA, A.A. IVANOV, A.A. KOSOBRYUKHOV, S.I. ALLAKHVERDIEV
Photosynthetica X:X | DOI: 10.32615/ps.2025.032
The effects of additional far-red light (FRL) on the growth parameters, photosynthetic activity, and pro- or antioxidant balance of Lactuca sativa L. plants grown for 30 d were studied. The plants were grown under white light-emitting diodes with equal PAR intensities at red/far-red light ratios of 0.29, 0.89, and 1.67 and without FRL. Compared to the absence of the FRL, growth at a 0.29 ratio caused an increase in plant biomass and leaf area, but a decrease in PSII activity, net photosynthetic rate (PN) per unit area, and stomatal conductance. High irradiance for 4 h at 1,000 μmol(photon) m-2 s-1...