Effects of partial replacement of red by green light in the growth spectrum on photomorphogenesis and photosynthesis in tomato plants.

ABSTRACT: The artificial light used in growth chambers is usually devoid of green (G) light, which is considered to be less photosynthetically efficient than blue (B) or red (R) light. To verify the role of G light supplementation in the spectrum, we modified the RB spectrum by progressively replacing R light with an equal amount of G light. The tomato plants were cultivated under 100 µmol m^-2 s^-1 of five different combinations of R (35-75%) and G light (0-40%) in the presence of a fixed proportion of B light (25%) provided by light-emitting diodes (LEDs). Substituting G light for R altered the plant's morphology and partitioning of biomass. We observed a decrease in the dry biomass of leaves, which was associated with increased biomass accumulation and the length of the roots.

SUBMITTER: Trojak M 

PROVIDER: S-EPMC8940809 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature