Academic Articles

Search peer-reviewed publications using filters to quickly find relevant research featuring Valoya across crops, cultivation environments and more.

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3.8

Spectral Quality Effects on Strawberry Flowering and Fruit Set in Year-Round Production

Scientia Horticulturae
2023

This trial examined how spectral quality influences flower initiation and fruit set in everbearing strawberry under year-round greenhouse production. Treatments combined different red to blue ratios with a constant daily light integral. Flowering was advanced under treatments with elevated red content, while runner formation was suppressed. Fruit set percentage and average berry weight both responded positively to the enriched spectra. The work provides a practical basis for scheduling lighting recipes across the production calendar.

4.2

Energy Use Efficiency of LED Lighting Strategies in Northern Greenhouse Strawberry

Frontiers in Plant Science
2023

This study compared several supplemental lighting strategies for greenhouse strawberry at northern latitudes on an energy efficiency basis. Yield, marketable quality and electricity consumption were tracked across a full winter production season. Adaptive strategies that responded to natural light availability outperformed fixed schedules on yield per kilowatt hour. Fruit quality parameters were comparable across all lighting strategies tested. The analysis provides growers with a framework for evaluating lighting investments under high energy prices.

3.8

Photosynthetic Responses of Lettuce to Different Light Spectra Under Controlled Environment

Scientia Horticulturae
2022

Lettuce was cultivated under several narrow and broad-band LED spectra to quantify differences in photosynthetic performance and morphology. Gas exchange measurements and chlorophyll fluorescence were recorded throughout the production cycle. Broad-spectrum treatments sustained higher net assimilation rates than comparable narrow-band treatments at equivalent photon flux. Leaf area and dry matter partitioning also varied substantially between spectral treatments. The study concludes that spectral composition is a meaningful lever for improving both productivity and visual quality in sole-source lighting systems.

4.2

UV-A Supplementation Enhances Secondary Metabolite Production in Greenhouse Tomato

Frontiers in Plant Science
2022

Supplemental UV-A radiation was delivered to greenhouse tomato during the final weeks before harvest. Fruit and leaf tissue were analysed for phenolic and carotenoid concentrations. Supplemented plants showed elevated concentrations of several health-related metabolites relative to controls. No adverse effects on yield or plant vigour were observed at the applied doses. The results suggest UV-A supplementation is a viable tool for enhancing nutritional quality in protected cultivation.

3.8

Light Spectrum Effects on Postharvest Shelf Life of Vertically Farmed Basil

Scientia Horticulturae
2022

Basil produced under contrasting spectral treatments was evaluated for postharvest performance during cold storage. Visual quality, water loss and chlorophyll retention were recorded at intervals over two weeks. Material grown under higher blue fractions retained visual quality significantly longer in storage. Water loss rates were also reduced in these treatments, consistent with observed differences in leaf anatomy. The work demonstrates that preharvest lighting decisions carry measurable consequences for shelf life.

3.8

Far-Red Supplementation Alters Leaf Morphology and Biomass Allocation in Greenhouse Tomato

Scientia Horticulturae
2021

Supplemental far-red radiation was applied to greenhouse tomato during the winter production season to assess morphological and yield responses. Treated plants exhibited longer internodes and larger individual leaves compared with untreated controls. Biomass allocation shifted measurably towards generative organs in the later stages of the trial. Fruit set and early yield improved without a corresponding decline in fruit quality parameters. These findings support the targeted use of far-red wavelengths as a supplementary strategy in high-latitude greenhouse production.

4.2

Wide-Spectrum LED Lighting Improves Essential Oil Yield in Basil

Frontiers in Plant Science
2021

Sweet basil was produced under wide-spectrum and narrow-band LED treatments to compare essential oil yield and composition. Distillation was performed on harvested material at a uniform developmental stage. Wide-spectrum treatments produced higher total oil yield per unit of fresh weight. The relative abundance of key aroma compounds also differed between spectral treatments. Results indicate that spectrum selection can be used to target specific quality attributes in aromatic crop production.

5.5

Comparative Analysis of Broad and Narrow Spectra on Barley Grain Quality

Journal of Experimental Botany
2021

Barley was grown to maturity under broad-spectrum and narrow-band lighting to compare grain yield and compositional quality. Protein content, grain size distribution and thousand-grain weight were measured at harvest. Broad-spectrum treatments produced more uniform grain size distributions than narrow-band equivalents. Protein content differed modestly between treatments but remained within commercial specification throughout. The findings are relevant to controlled-environment breeding and seed multiplication programmes.

4.2

Impact of Light Intensity and Photoperiod on Growth and Quality of Basil (Ocimum basilicum)

Frontiers in Plant Science
2020

This work evaluates how photosynthetic photon flux density and daylength interact to shape vegetative development and culinary quality in sweet basil. Plants were grown across a matrix of intensity and photoperiod treatments while holding daily light integral constant where possible. Higher intensities produced more compact canopies and greater fresh weight, whereas extended photoperiods favoured leaf expansion. Volatile profiles shifted measurably between treatments, indicating that spectrum and duration influence aroma as well as yield. The results offer practical guidance for growers balancing energy consumption against marketable quality in controlled environments.

3.8

Root Zone Temperature and Light Spectrum Interactions in Hydroponic Lettuce

Scientia Horticulturae
2020

This experiment tested whether root zone temperature modifies the crop response to light spectrum in hydroponic lettuce. A factorial design combined three nutrient solution temperatures with three spectral treatments. Significant interaction effects were detected for both shoot fresh weight and root architecture. Cooler root zones amplified the morphological differences attributable to spectrum. The study highlights the importance of considering the root environment when optimising lighting recipes.