Shmarev A, Vereshagin M, Pashkovskiy P, Kreslavski V D, Allakhverdiev S I
Institute of Basic Biological Problems, Russian Academy of Sciences, Institutskaya Street 2, 142290 Pushchino, Russia.
K.A. Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya Street 35, 127276 Moscow, Russia.
Photosynthetica. 2024 Apr 8;62(2):180-186. doi: 10.32615/ps.2024.016. eCollection 2024.
The effects of additional far-red light (FRL) on the photosynthetic and growth parameters of plants grown for 30 d and on the photosynthetic activity of the plants under high irradiance [4 h; 1,500 μmol(photon) m s] were studied. The plants were grown under coloured light-emitting diodes at a ratio of red light (RL): blue light (BL): green light (GL): far-red light (FRL) = 0.7:1:0.3:0.4 or RL:BL:GL:FRL = 0.7:1:0.3:0.8 (test, T). Additional FRL led to an increase in plant biomass, height, and leaf area but to a decrease in photosynthesis and respiration rates. However, PSII activity was greater in plants with additional FRL. It is suggested that the increase in biomass occurred mainly due to an increase in leaf area but not in photosynthesis. In addition, PSII in the experiment was less resistant to high irradiance. The possible direct and indirect influences of the FRL on growth and photosynthesis were considered.
研究了额外远红光（FRL）对生长30天的植物光合及生长参数的影响，以及对高光照强度[4小时；1500微摩尔（光子）·平方米·秒]下植物光合活性的影响。植物在彩色发光二极管下生长，红光（RL）：蓝光（BL）：绿光（GL）：远红光（FRL）的比例为0.7:1:0.3:0.4或RL:BL:GL:FRL = 0.7:1:0.3:0.8（试验组，T）。额外的FRL导致植物生物量、株高和叶面积增加，但光合速率和呼吸速率降低。然而，有额外FRL的植物中PSII活性更高。研究表明，生物量增加主要是由于叶面积增加，而非光合作用增强。此外，实验中的PSII对高光照强度的抗性较低。文中考虑了FRL对生长和光合作用可能的直接和间接影响。
