Photons from NIR LEDs can delay flowering in short-day soybean and Cannabis: Implications for phytochrome activity

Kusuma, Paul; Westmoreland, F. Mitchell; Zhen, Shuyang; Bugbee, Bruce

doi:10.1371/journal.pone.0255232

Cited by 4 publications

(3 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are indications that daytime grow light spectra may also affect the sensitivity of plants to night-break light treatments (Higuchi et al 2012). Interestingly, the intensity of FR can complicate the phytochrome driven responses because Pr forms of phytochrome can absorb a small amount of FR light, which is magnified at higher intensities (Kusuma et al 2021).…”

Section: Spectra Beyond Parmentioning

confidence: 99%

LED Lighting: A Grower’s Guide to Light Spectra

Stamford

Stevens

Mullineaux

et al. 2023

horts

View full text Add to dashboard Cite

For many growers, established and newcomers, the determination of the optimal light spectrum for growing crops can be challenging and highly dependent on crop species and variety. With the increased popularity of LED lighting, the capability to fine-tune a light spectrum has never been greater. Here, we break down the fundamental roles of the major spectral regions (ultraviolet, blue, green, red, and far-red) and explain the effect on plant growth, yield, and crop quality (i.e., greenness, coloration, flavor) when applied in isolation or combination. The first part of this review examines plant responses to light stimuli and the potential benefits for growers. We also discuss how LED lighting can be used to manipulate plant growth and development to improve crop productivity and/or value. We suggest some basic LED light “recipes” that could be used by growers to deliver specific growth effects and provide an easy-to-use visual reference guide. The second part of this review explores the impact of light treatments on crop productivity. Increased productivity is weighed against the ongoing costs associated with various light treatments, modeled in the context of UK electricity pricing.

show abstract

Section: Spectra Beyond Parmentioning

confidence: 99%

LED Lighting: A Grower’s Guide to Light Spectra

Stamford

Stevens

Mullineaux

et al. 2023

horts

View full text Add to dashboard Cite

show abstract

“…The extended photosynthetic photon flux density (ePPFD; 400 to 750 nm) was 600 ± 30 µmol m -2 s -1 during vegetative growth (18 hr/6 hr light/dark; DLI: 38.9 mol m -2 d -1 ) and 900 ± 50 µmol m -2 s -1 during reproductive growth (12 hr/12 hr light/dark; DLI: 38.9 mol m -2 d -1 ) from white+red LEDs (BIOS Lighting Inc., Icarus Vi) ( Kusuma et al., 2021 ). The fraction of far-red photons (700 to 750 nm) was 1.5%.…”

Section: Methodsmentioning

confidence: 99%

Sustainable Cannabis Nutrition: Elevated root-zone phosphorus significantly increases leachate P and does not improve yield or quality

Westmoreland

Bugbee

2022

Front. Plant Sci.

Self Cite

View full text Add to dashboard Cite

Phosphorus (P) is an essential but often over-applied nutrient in agricultural systems. Because of its detrimental environmental effects, P fertilization is well studied in crop production. Controlled environment agriculture allows for precise control of root-zone P and has the potential to improve sustainability over field agriculture. Medical Cannabis is uniquely cultivated for the unfertilized female inflorescence and mineral nutrition can affect the yield and chemical composition of these flowers. P typically accumulates in seeds, but its partitioning in unfertilized Cannabis flowers is not well studied. Here we report the effect of increasing P (25, 50, and 75 mg P per L) in continuous liquid fertilizer on flower yield, cannabinoid concentration, leachate P, nutrient partitioning, and phosphorus use efficiency (PUE) of a high-CBD Cannabis variety. There was no significant effect of P concentration on flower yield or cannabinoid concentration, but there were significant differences in leachate P, nutrient partitioning, and PUE. Leachate P increased 12-fold in response to the 3-fold increase in P input. The P concentration in the unfertilized flowers increased to more than 1%, but this did not increase yield or quality. The fraction of P in the flowers increased from 25 to 65% and PUE increased from 31 to 80% as the as the P input decreased from 75 to 25 mg per L. Avoiding excessive P fertilization can decrease the environmental impact of Cannabis cultivation.

show abstract

“…The ideal light quality should have optimum wavelengths of color spectra suited for inducing cellular, biochemical, and molecular processes in the plant under a closed system. The standard light quality has specific wavelengths of the electromagnetic light spectra consisting of 320–400 nm UVA, 400–500 nm blue, 500–600 nm green, 600–700 nm red, 700–750 nm far-red . The ideal electromagnetic light spectra are assimilated by photoreceptor such as phytochromes, cryptochrome, phototropins, and the zeitlupe family protein.…”

Section: Introductionmentioning

confidence: 99%

Production of, Factors Affecting, Gene Regulations, and Challenges in Tissue Cultured Plant through Soilless Culture

Sharma

Pandey

Devadas³

et al. 2023

J. Agric. Food Chem.

View full text Add to dashboard Cite

Soilless culture also known as water based culture and substrate based culture has immense potential to grow tissue cultured plants in a closed and controlled environment system. This review analyzes the various factors that affect the vegetative growth, reproductive growth, metabolic processes, and gene regulatory functions of tissue cultured plants and the suitability of soilless culture for tissue culture plants. Experiments show that morphological and reproductive abnormalities are mitigated in tissue cultured plants by gene regulation in a closed and controlled environment system. Various factors of a soilless culture influence gene regulation and enhance cellular, molecular, and biochemical processes and compensate constraints in tissue cultured plants in closed and controlled environment conditions. The soilless culture can be utilized to harden and grow tissue culture plants. The tissue cultured plants counter water logging problems and are supplied with nutrients at 7 day intervals in the water based culture. It is necessary to analyze the involvement of regulatory genes in detail in combating challenges of tissue cultured plants in soilless cultures under closed systems. Detailed studies are also required to determine anatomy, genesis, and function of microtuber cells in tissue cultured plants.

show abstract

Photons from NIR LEDs can delay flowering in short-day soybean and Cannabis: Implications for phytochrome activity

Cited by 4 publications

References 51 publications

LED Lighting: A Grower’s Guide to Light Spectra

LED Lighting: A Grower’s Guide to Light Spectra

Sustainable Cannabis Nutrition: Elevated root-zone phosphorus significantly increases leachate P and does not improve yield or quality

Production of, Factors Affecting, Gene Regulations, and Challenges in Tissue Cultured Plant through Soilless Culture

Contact Info

Product

Resources

About