Additional far-red light improves the growth and resistance of the photosynthetic apparatus of <i>Lactuca sativa</i> L. to high-intensity light.

ABSTRACT: 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 (P _N) per unit area, and stomatal conductance. High irradiance for 4 h at 1,000 μmol(photon) m^-2 s^-1 decreased PSII activity and P _N, but to the least extent in the 0.89 option. The possible pathways of the FRL's impact on the pho

SUBMITTER: Kreslavski VD 

PROVIDER: S-EPMC12805460 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature