The combination of blue and red LED light improves growth and phenolic acid contents in Salvia miltiorrhiza Bunge

Zhang, Shuncang; Ma, Jiaqi; Zou, Haiyan; Zhang, Lei; Li, Suhao; Wang, Youping

doi:10.1016/j.indcrop.2020.112959

Cited by 41 publications

(17 citation statements)

References 47 publications

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“…The study also investigated glycoside content in D. purpurea , where the highest concentrations were observed under R:B = 1:4, 91 probably due to the role of blue photoreceptors in the biosynthesis and accumulation of these metabolites 92 . Red and blue light (with R:B of 9:1, 2.3:1, and 0.4:1) also increased the phenol content in Salvia miltiorrhiza , 93 compared with monochromatic white, red or blue LED light. The combination of red and blue light was shown to upregulate the expression of many genes encoding key enzymes in the phenylpropanoid pathway and revealed transcription levels of genes consistent with the accumulation of some phenols compounds (e.g., rosmarinic acid) 93 .…”

Section: Resultsmentioning

confidence: 99%

Beyond vegetables: effects of indoor LED light on specialized metabolite biosynthesis in medicinal and aromatic plants, edible flowers, and microgreens

et al. 2021

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Specialized metabolites from plants are important for human health due to their antioxidant properties. Light is one of the main factors modulating the biosynthesis of specialized metabolites, determining the cascade response activated by photoreceptors and the consequent modulation of expressed genes and biosynthetic pathways. Recent developments in light emitting diode (LED) technology have enabled improvements in artificial light applications for horticulture. In particular, the possibility to select specific spectral light compositions, intensities and photoperiods has been associated with altered metabolite content in a variety of crops. This review aims to analyze the effects of indoor LED lighting recipes and management on the specialized metabolite content in different groups of crop plants (namely medicinal and aromatic plants, microgreens and edible flowers), focusing on the literature from the last 5 years. The literature collection produced a total of 40 papers, which were analyzed according to the effects of artificial LED lighting on the content of anthocyanins, carotenoids, phenols, tocopherols, glycosides, and terpenes, and ranked on a scale of 1 to 3. Most studies applied a combination of red and blue light (22%) or monochromatic blue (23%), with a 16 h day−1 photoperiod (78%) and an intensity greater than 200 μmol m−2 s−1 (77%). These treatment features were often the most efficient in enhancing specialized metabolite content, although large variations in performance were observed, according to the species considered and the compound analyzed. The review aims to provide valuable indications for the definition of the most promising spectral components toward the achievement of nutrient‐rich indoor‐grown products. © 2021 The Authors. Journal of The Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

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Section: Resultsmentioning

confidence: 99%

Beyond vegetables: effects of indoor LED light on specialized metabolite biosynthesis in medicinal and aromatic plants, edible flowers, and microgreens

et al. 2021

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“…For example, Lobiuc et al (2017) cultured Ocimum basilicum seedlings under different light conditions, and found that the dry mass, rosmarinic acid, and caffeic acid contents of seedlings were 1.45-, 15-, and 4-fold higher under combined red and blue light (1R:2B), respectively, than under control (white) conditions. Zhang et al (2020) treated Salvia miltiorrhiza seedlings with monochromatic blue light (B), monochromatic red light (R), and combined blue and red light, and showed that seedling growth and phenolic acid production were stimulated under 7R:3B. Similar to UV-B, blue and red light wavelengths affect the production of phenylpropanoids by regulating the transcript levels of phenylpropanoid biosynthetic genes (Figure 1B; Hao et al, 2016;Alrifai et al, 2019).…”

Section: Polyphenolsmentioning

confidence: 99%

Effects of Light on Secondary Metabolite Biosynthesis in Medicinal Plants

Zhang

Zou

et al. 2021

Front. Plant Sci.

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Secondary metabolites (SMs) found in medicinal plants are one of main sources of drugs, cosmetics, and health products. With the increase in demand for these bioactive compounds, improving the content and yield of SMs in medicinal plants has become increasingly important. The content and distribution of SMs in medicinal plants are closely related to environmental factors, especially light. In recent years, artificial light sources have been used in controlled environments for the production and conservation of medicinal germplasm. Therefore, it is essential to elucidate how light affects the accumulation of SMs in different plant species. Here, we systematically summarize recent advances in our understanding of the regulatory roles of light quality, light intensity, and photoperiod in the biosynthesis of three main types of SMs (polyphenols, alkaloids, and terpenoids), and the underlying mechanisms. This article provides a detailed overview of the role of light signaling pathways in SM biosynthesis, which will further promote the application of artificial light sources in medicinal plant production.

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“…Other studies have reported increased TPC in Chinese cabbage and lettuce irradiated with blue LEDs alone compared with those irradiated with red LEDs alone or a combination of red and blue LEDs [ 98 ], indicating that the effects of LEDs on TPC varied among plant species. Several studies have investigated the levels of phenolic compounds in plant species grown under LED irradiation [ 55 , 57 , 58 , 68 , 72 , 174 , 175 ]. Chung et al [ 4 ] reported an increase in malonyldaidzin, malonyl genistin, salicylic acid, p -hydrobenzoic acid, and gentisic acid levels in Pachyrhizus erosus grown under red LED irradiation.…”

Section: Resultsmentioning

confidence: 99%

Application of Light-Emitting Diodes for Improving the Nutritional Quality and Bioactive Compound Levels of Some Crops and Medicinal Plants

et al. 2021

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Light is a key factor that affects phytochemical synthesis and accumulation in plants. Due to limitations of the environment or cultivated land, there is an urgent need to develop indoor cultivation systems to obtain higher yields with increased phytochemical concentrations using convenient light sources. Light-emitting diodes (LEDs) have several advantages, including consumption of lesser power, longer half-life, higher efficacy, and wider variation in the spectral wavelength than traditional light sources; therefore, these devices are preferred for in vitro culture and indoor plant growth. Moreover, LED irradiation of seedlings enhances plant biomass, nutrient and secondary metabolite levels, and antioxidant properties. Specifically, red and blue LED irradiation exerts strong effects on photosynthesis, stomatal functioning, phototropism, photomorphogenesis, and photosynthetic pigment levels. Additionally, ex vitro plantlet development and acclimatization can be enhanced by regulating the spectral properties of LEDs. Applying an appropriate LED spectral wavelength significantly increases antioxidant enzyme activity in plants, thereby enhancing the cell defense system and providing protection from oxidative damage. Since different plant species respond differently to lighting in the cultivation environment, it is necessary to evaluate specific wavebands before large-scale LED application for controlled in vitro plant growth. This review focuses on the most recent advances and applications of LEDs for in vitro culture organogenesis. The mechanisms underlying the production of different phytochemicals, including phenolics, flavonoids, carotenoids, anthocyanins, and antioxidant enzymes, have also been discussed.

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The combination of blue and red LED light improves growth and phenolic acid contents in Salvia miltiorrhiza Bunge

Cited by 41 publications

References 47 publications

Beyond vegetables: effects of indoor LED light on specialized metabolite biosynthesis in medicinal and aromatic plants, edible flowers, and microgreens

Beyond vegetables: effects of indoor LED light on specialized metabolite biosynthesis in medicinal and aromatic plants, edible flowers, and microgreens

Effects of Light on Secondary Metabolite Biosynthesis in Medicinal Plants

Application of Light-Emitting Diodes for Improving the Nutritional Quality and Bioactive Compound Levels of Some Crops and Medicinal Plants

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