Fig. 3
From: Exposure to lower red to far-red light ratios improve tomato tolerance to salt stress
Effects of different R: FR values on chlorophyll content, photosynthesis rate, and PSII electron transport in tomato seedlings under salinity stress. a chlorophyll a, chlorophyll b and carotenoid content. b light responsive curve. c net photosynthesis rate. d actual photochemical efficiency of PSII. e electron transport rate. f the photochemical quenching coefficient. Chlorophyll content, the light responsive curve and PSII electron transport parameters were measured eight days after salinity treatment. Net photosynthesis rate was measured 0, 2, 4, 6, and 8 days after exposure to salinity treatment. T1, 0 mM NaCl + 7.4 R: FR; T2, 0 mM NaCl + 1.2 R: FR; T3, 0 mM NaCl + 0.8 R: FR; T4, 100 mM NaCl + 7.4 R: FR; T5, 100 mM NaCl + 1.2 R: FR; T6, 100 mM NaCl + 0.8 R: FR. Vertical bars on the lines represent the SE (n = 5), Bars with different letters are significantly different at the 0.05 level (Duncan’s multiple range test)