Supplemental Far-Red Light Stimulates Lettuce Growth: Disentangling Morphological and Physiological Effects.

ABSTRACT: Light-emitting diodes allow for the application of specific wavelengths of light to induce various morphological and physiological responses. In lettuce (Lactuca sativa), far-red light (700-800 nm) is integral to initiating shade responses which can increase plant growth. In the first of two studies, plants were grown with a similar photosynthetic photon flux density (PPFD) but different intensities of far-red light. The second study used perpendicular gradients of far-red light and PPFD, allowing for examination of interactive effects. The far-red gradient study revealed that increasing supplemental far-red light increased leaf length and width, which was associated with increased projected canopy size (PCS). The higher PCS was associated with increased cumulative incident light received

SUBMITTER: Legendre R 

PROVIDER: S-EPMC7829796 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature