Photosynthesis, Morphology, Yield, and Phytochemical Accumulation in Basil Plants Influenced by Substituting Green Light for Partial Red and/or Blue Light

Dou, Henri; Niu, Genhua; Gu, Mengmeng

doi:10.21273/hortsci14282-19

Cited by 38 publications

(29 citation statements)

References 46 publications

(80 reference statements)

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“…The TPC and TF content of broccoli sprouts significantly increased in 1R1B+Se, 1R2B+Se, and 2R1B+Se, and the highest content was observed in 1R2B+Se ( Figure 3 ). The concentrations of phenolics and flavonoids in green and purple basil plants were both decreased by G light radiation [ 43 ]. It was postulated that the decreased phytochemical concentration in green light treatments was caused by the co-actions of decreased R and/or B light proportions and an increasing reversal of B light-induced effects by G light [ 43 ].…”

Section: Discussionmentioning

confidence: 99%

“…The concentrations of phenolics and flavonoids in green and purple basil plants were both decreased by G light radiation [ 43 ]. It was postulated that the decreased phytochemical concentration in green light treatments was caused by the co-actions of decreased R and/or B light proportions and an increasing reversal of B light-induced effects by G light [ 43 ]. On the other hand, B light could activate the expression of PAL (phenylalanine ammonia-lyase), CHS (chalcone synthesis), and DFR (dihydroflavono l-4-reductase), which are key elements in the biosynthetic pathways of anthocyanin and flavonoid compounds [ 44 ].…”

Section: Discussionmentioning

confidence: 99%

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The Combination of Selenium and LED Light Quality Affects Growth and Nutritional Properties of Broccoli Sprouts

Gao

Shi

et al. 2020

Molecules

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Selenium (Se) supplement was combined with different LED light qualities to investigate mutual effects on the growth, nutritional quality, contents of glucosinolates and mineral elements in broccoli sprouts. There were five treatments: CK:1R1B1G, 1R1B1G+Se (100 μmol L−1 Na2SeO3), 1R1B+Se, 1R2B+Se, 2R1B+Se, 60 μmol m−2 s−1 PPFD, 12 h/12 h (light/dark). Sprouts under a combination of selenium and LED light quality treatment exhibited no remarkable change fresh weight, but had a shorter hypocotyl length, lower moisture content and heavier dry weight, especially with 1R2B+Se treatment. The contents of carotenoid, soluble protein, soluble sugar, vitamin C, total flavonoids, total polyphenol and contents of total glucosinolates and organic Se were dramatically improved through the combination of Se and LED light quality. Moreover, heat map and principal component analysis showed that broccoli sprouts under 1R2B+Se treatment had higher nutritional quality and health-promoting compound contents than other treatments. This suggests that the Se supplement under suitable LED lights might be beneficial to selenium-biofortified broccoli sprout production.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

The Combination of Selenium and LED Light Quality Affects Growth and Nutritional Properties of Broccoli Sprouts

Gao

Shi

et al. 2020

Molecules

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“…Results indicated the possibility of a targeted use of B and G to regulate the amount of functional metabolites, such as anthocyanins, catechins and l-ascorbate, to enhance tea quality and taste and to potentially trigger defense mechanisms in tea plants. Dou et al (2019) investigated the effects of substituting partial R and/or B with G light on plant growth in a green and a purple cultivar of basil (Table 1). The net photosynthesis (Pn) did not change in green plants whereas it increased in purple plants in presence of G light compared with RB only.…”

Section: Vegetable Cropsmentioning

confidence: 99%

Light-Quality Manipulation to Control Plant Growth and Photomorphogenesis in Greenhouse Horticulture: The State of the Art and the Opportunities of Modern LED Systems

Paradiso

Proietti

2021

J Plant Growth Regul

243

121

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Light quantity (intensity and photoperiod) and quality (spectral composition) affect plant growth and physiology and interact with other environmental parameters and cultivation factors in determining the plant behaviour. More than providing the energy for photosynthesis, light also dictates specific signals which regulate plant development, shaping and metabolism, in the complex phenomenon of photomorphogenesis, driven by light colours. These are perceived even at very low intensity by five classes of specific photoreceptors, which have been characterized in their biochemical features and physiological roles. Knowledge about plant photomorphogenesis increased dramatically during the last years, also thanks the diffusion of light-emitting diodes (LEDs), which offer several advantages compared to the conventional light sources, such as the possibility to tailor the light spectrum and to regulate the light intensity, depending on the specific requirements of the different crops and development stages. This knowledge could be profitably applied in greenhouse horticulture to improve production schedules and crop yield and quality. This article presents a brief overview on the effects of light spectrum of artificial lighting on plant growth and photomorphogenesis in vegetable and ornamental crops, and on the state of the art of the research on LEDs in greenhouse horticulture. Particularly, we analysed these effects by approaching, when possible, each single-light waveband, as most of the review works available in the literature considers the influence of combined spectra.

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“…A study investigating different ratios of red and blue light on flavonoids synthesis in red and green basil microgreens found species-specific responses to the lighting in which one cultivar dominated flavonoid accumulation under a higher red ratio while the other under balanced red and blue ratios (Lobiuc et al, 2017). Another study examining increasing doses of supplementary green light (500-599 nm) to red and blue lights on flavonoids synthesis in green and purple basil leaves found an inhibitory response under a higher ratio and no effect under a lower one (Dou et al, 2019). Our study using 590 nm (amber) falls within their green light range which could indicate why our microgreens were not linearly responsive to the lighting.…”

Section: Tfcmentioning

confidence: 99%

Amber, red and blue LEDs modulate phenolic contents and antioxidant activities in eight Cruciferous microgreens

Alrifai¹,

Hao²,

Liu³

et al. 2020

JFB

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LEDs are applied in controlled environments to produce high-quality microgreens of various nutritional benefit. We investigate different ratios of amber, blue and red LEDs on the synthesis of antioxidant phytochemicals in 8 species of the Brassica genus of microgreens. Microgreens were grown under 8 different LED ratios using combined amber, blue and red ranging from 4.73–58.94%, 20.52–58.94% and 74.36–0.57%, respectively. Results indicated that the effect of the combined lighting on antioxidant activity, total phenolic contents (TPC) accumulation, or its sub-groups total flavonoid contents (TFC) and total anthocyanin contents (TAC), were species-dependent. With increasing amber and blue and concurrently decreasing red lighting, overall positive correlations were observed for TPC, TFC and antioxidant activities (DPPH and FRAP), and overall negative correlations for TAC and ORAC (p < 0.05). Current findings suggest the microgreens can be clustered into 3 groups based on phytochemical contents and sensitivity to the lighting: (i) high blue and amber dose-dependence producing high total phenolics and flavonoids content and DPPH antioxidant activity in radish, red Rambo microgreens; (ii) moderate to high sensitivity to overall lighting but no clear dose-dependence to the light in mustards Barbarossa and red kingdom; and (iii) mizunas, pac choi and other microgreens with various responses to lighting.

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Photosynthesis, Morphology, Yield, and Phytochemical Accumulation in Basil Plants Influenced by Substituting Green Light for Partial Red and/or Blue Light

Cited by 38 publications

References 46 publications

The Combination of Selenium and LED Light Quality Affects Growth and Nutritional Properties of Broccoli Sprouts

The Combination of Selenium and LED Light Quality Affects Growth and Nutritional Properties of Broccoli Sprouts

Light-Quality Manipulation to Control Plant Growth and Photomorphogenesis in Greenhouse Horticulture: The State of the Art and the Opportunities of Modern LED Systems

Amber, red and blue LEDs modulate phenolic contents and antioxidant activities in eight Cruciferous microgreens

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