How to utilize far-red photons effectively: substitution or supplementation with photosynthetically active radiation? A case study of greenhouse lettuce.

ABSTRACT: The addition of photosynthetically active radiation (PAR, 400-700 nm) with a specific quantity of far-red photons (FR, 700-750 nm) has been demonstrated to positively influence biomass accumulation and nutritional quality in greenhouse lettuce. However, current relevant studies seldom consider comprehensive and systematic comparisons of the efficacy of different approaches: substitution versus supplementation. The present work aimed to compare the two aforementioned strategies, evaluate how they impact plant growth, development and metabolic processes, and analyse the light use efficiency. In this study, loose-leaf lettuce (cv. 'Dasusheng') grown in a glass Venlo-type greenhouse was exposed to six supplementary light treatments, including white-red (WR) light-emitting diodes (LEDs), FR LED

SUBMITTER: Yan Z 

PROVIDER: S-EPMC11837345 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature