Effect of Amber (595 nm) Light Supplemented with Narrow Blue (430 nm) Light on Tomato Biomass

Abstract

Full-spectrum light-emitting diodes (LEDs) mainly comprising 460-nm + 595-nm light are becoming a mainstay in the horticulture industry, and recent studies indicate that plant productivity under white LEDs is higher than combined blue and red LED lighting. Different light properties (wavelength and bandwidth) in full-spectrum light, particularly for the blue and amber light regions, have only partly been explored. This research aimed to characterize the effects of amber + blue light wavelengths and bandwidths on tomato (Solanum lycopersicum cv. Beefsteak) growth, morphology, and production efficiency. Tomato seedlings were subjected to four different light treatments for 60 days: narrow amber light (595 nm), narrow blue + narrow amber light (430 nm + 595 nm) with a 1:10 ratio, white LED (455 nm + 595 nm), and a high-pressure sodium (HPS) lamp (control). The highest mean fresh mass yield occurred with the narrow blue + narrow amber light (479 g), followed by white LED at 20% less, HPS at 34% less, and narrow amber at 40% less. Dry mass and plant height were similar among light treatments. Supplementing narrow amber light with 430-nm blue light led to a 20% increase in chlorophyll content. Findings indicate that narrow amber light is more efficient in biomass accumulation than broad amber light and that precise selection of different blue and amber wavelengths can greatly impact the growth and development of tomato seedlings. This energy-efficient narrow-wavelength combination shows improvement over white LED lighting for maximizing tomato growth.

White LED Lighting Increases the Root Productivity of Panax ginseng C. A. Meyer in a Hydroponic Cultivation System of a Plant Factory

“…This finding further supports the notion of P. ginseng's growth response being adapted to a shaded environment. In contrast, heliophyte plants such as Solanum lycopersicum and Arabidopsis thaliana did not exhibit increased shoot or leaf biomass under higher-light-intensity yellow light such as was observed in this study [36,45]. This suggests that the adaptation of heliophytes to yellow light may be less effective compared to shade-tolerant plants like P. ginseng.…”

Speed Breeding for Crop Improvement and Food Security

“…Dry mass and plant height showed only minor variations. Additionally, supplementing narrow amber light with 430 nm blue light increased chlorophyll content by 20%, emphasizing the importance of precise wavelength selection for tomato growth [31]. The study also suggests that winter wheat can be successfully grown indoors using various LED lighting configurations.…”

Transcriptomic Analysis Reveals the Regulatory Mechanism of Color Diversity in Rhododendron pulchrum Sweet (Ericaceae)

“…Data on the contents of anthocyanins and flavonoids were subjected to analysis of variance (one-way ANOVA) using SPSS 20.0 software (IBM Corp, Armonk, NY, USA), while graphs were produced using Microsoft Excel (v2013, Microsoft Corp., USA) and Origin 8.0 (Origin Lab Corporation, Northampton, MA, USA) [ 61 ]. Treatment means were presented as the mean ± standard deviations of the mean using the three replicates [ 62 ].…”