LED light mediates phenolic accumulation and enhances antioxidant activity in Melissa officinalis L. under drought stress condition

Ahmadi, Tayebeh; Shabani, Leila; Rahimmalek, Mehdi

doi:10.1007/s00709-020-01501-4

Cited by 31 publications

(15 citation statements)

References 52 publications

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“…During drought, the greater induction of the stomatal opening was observed in blue light than in red one in Vicia faba (Sun et al 2014). A mixture of blue and red lights could improve drought tolerance of Melissa officinalis L. compared to monochromatic light as shown by the better growth and reduced lipid peroxidation due to the activation of various antioxidants (Ahmadi et al 2020). A similar result was obtained in rocket, but not in lettuce (Ginzburg and Klein 2020).…”

Section: Introductionsupporting

confidence: 53%

Light spectrum modifies the drought-induced changes of glutathione and free amino acid levels in wheat

et al. 2021

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The proposed spectral control of the adaptive metabolic responses to drought was tested by the comparison of two wheat genotypes with different stress tolerance. White light was used as the reference to see the effects of the three altered ratios of blue, red, and far-red spectral components, which conditions are referred to as blue, pink, and far-red lights. Under all spectral conditions, drought greatly reduced the growth of both genotypes. However, the glutathione content decreased and the proline level increased, independently of the spectrum, only in the sensitive genotype. Far-red light greatly decreased the amount of cystine and glutathione disulphide during the stress which resulted in their lower ratios compared to the reduced forms only in the tolerant genotype. The maintained more reducing redox environment contributes to its better stress tolerance. In far-red light, drought induced a greater accumulation of several free amino acids (mHis, Val, Ile, Leu, Asn, His, Tyr, Lys, Arg) in the tolerant genotype, while a smaller one in the sensitive genotype compared to the other spectral conditions. The transcript level of the genes related to amino acid and glutathione metabolism was also different between the two genotypes under this condition. The present results indicate the adaptive adjustment of glutathione and amino acid levels by far-red light during drought which observation can serve as a basis for the spectrum-dependent modification of the protective metabolites (glutathione, proline) of crops to reduce the stress-induced damages.

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Section: Introductionsupporting

confidence: 53%

Light spectrum modifies the drought-induced changes of glutathione and free amino acid levels in wheat

et al. 2021

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“…Light-emitting diode (LED) technology provides an essentially distinct and energy-effective approach for the agricultural industries ( Ballare et al, 2012 ). The LED light system allows the regulation of spectrum, spectral composition, and light intensity to supply better growth conditions for commercial crops, fruits, flower plants, and even trees ( Yeh and Chung, 2009 ; Tayebeh et al, 2020 ). Theoretically, in a plant factory framework, if all the factors are within the most favorable level, some specific plants can grow continuously and efficiently.…”

Section: Introductionmentioning

confidence: 99%

Identification of Differentially Expressed Genes and Pathways Involved in Growth and Development of Mesona chinensis Benth Under Red- and Blue-Light Conditions

et al. 2021

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Mesona chinensis Benth (MCB) is an important Chinese herbal medicine. The plant factories might be one of the ways to solve the shortage of MCB supply. In this study, the MCB seedlings were treated under the red (R) and blue (B) lights in the plant factory. Results showed that the red light promoted the growth and development of MCB in comparison with the blue light. Under the red-light condition, the biomass, plant height, and root characteristics were significantly higher than those under blue-light condition, while the soil and plant analyzer development (SPAD) under the red-light treatment was significantly lower than that under the blue-light treatment. Red light also significantly promoted the content of soluble sugar and pectin of MCB compared with blue light. Transcriptome analysis showed that a total of 4,165 differentially expressed genes (DEGs) were detected including 2,034 upregulated and 2,131 downregulated. Of these, 1,112 DEGs including 410 upregulated and 702 downregulated genes were associated with 111 pathways. Moreover, a total of 8,723 differentially expressed transcription factors (TFs) were identified in R vs. B, and these TFs were distributed in 56 gene families. Metabonomic results revealed that a total of 184 metabolites and 99 differentially expressed metabolites (DEMs) (42 upregulated and 57 downregulated) were identified in the red- and blue-light treatments. Integrative analysis of transcriptome and metabolome unveiled that a total of 24 pathways included 70 compounds (metabolites) and were associated with 28 unigenes. In particular, these pathways included starch and sucrose metabolism, phenylpropanoid biosynthesis, cysteine and methionine metabolism, glycolysis/gluconeogenesis, and pentose and glucuronate interconversions. The unigenes included asparagine synthetase (AS), thymidine kinase (TK), alpha, alpha-trehalose-phosphate synthase (TPS), phosphatase IMPL1 (IMPL1), dihydroflavonol 4-reductase (D4R), and 4-coumarate-CoA ligase-like 6 (4CL6), bifunctional aspartokinase-homoserine dehydrogenase 1 (thrA), and abscisic acid 8′-hydroxylase 2 isoform X1 (ABA8). It was indicated that these pathways and genes might play important roles in the growth and development of MCB. This study laid a foundation for the future research of MCB.

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“…Park et al [29] recently demonstrated that exposure to blue LED light can enhance the production of the majority of phenolic compounds, including gallate, quercetin, caffeate, and chlorogenic acid in Brassica juncea sprouts. The effect of red LEDs in combination with blue LEDs has been observed by Ahmadi et al [16] in lemon balm, where red + blue lights maintained higher antioxidant and phenylalanine ammonialyase enzyme activities. One of the reasons for the high production of bioactive compounds and antioxidant activities is the presence of red and blue wavelengths in the light spectrum.…”

Section: Discussionmentioning

confidence: 72%

“…The increase in bioactive compounds in red + blue LED-exposed eggplants is probably caused by the stimulation of genes, owing to the phenylpropanoid pathway, which is related to the biosynthesis of phenolic acids and flavonoid content in plants [8,28]. The other explanation for the higher antioxidant activity of plants exposed to blue LEDs is that the higher energy levels of short wavelengths (blue at 450-460 nm for example) stimulate oxidative stress, thus enhancing the scavenging of reactive oxygen species [16]. Park et al [29] recently demonstrated that exposure to blue LED light can enhance the production of the majority of phenolic compounds, including gallate, quercetin, caffeate, and chlorogenic acid in Brassica juncea sprouts.…”

Section: Discussionmentioning

confidence: 99%

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Enhancement of Antioxidant Activity and Bioactive Compounds in Eggplants Using Postharvest LEDs Irradiation

et al. 2022

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Eggplant (Solanum melongena L.), one of the major vegetable crops, is recognized for its availability of numerous bioactive compounds and antioxidant activity. The accumulation of these compounds in plant tissues can be increased by exogenous stimuli, including light exposure. This study aimed at enhancing the antioxidant activity and bioactive compounds of eggplant using light-emitting diode (LEDs) irradiation after harvest. For this purpose, eggplant fruits were irradiated under LEDs at different wavelengths, including red (650–660 nm), blue (450–460 nm), or the combination of red and blue (red + blue) LEDs, for 48 h. The results indicated that red + blue LED exposure during postharvest significantly (p < 0.05) elevated the accumulation of bioactive compounds and antioxidant activity. The accumulation of major phenolic compounds, chlorogenic acid (58.59 mg/100 g FW), and gallic acid (14.25 mg/100 g FW) in the eggplant fruits was increased significantly under red + blue irradiation when compared with the control (under dark condition). The total phenolic (821.86 mg GAE/100 g FW) and the total flavonoid (595.98 mg CE/100 g FW) contents were shown to have a considerably high accumulation in the peels of eggplant after irradiation under red + blue LEDs, whereas the total carotenoid content was relatively high in the flesh of eggplant fruits. Consequently, red + blue LED irradiation can be considered as a convenient tool used for the postharvest of eggplant, with a positive effect in the increasing of important secondary metabolites. The obtained eggplant fruits proved to be a promising source of bioactive and antioxidant compounds for functional food production.

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LED light mediates phenolic accumulation and enhances antioxidant activity in Melissa officinalis L. under drought stress condition

Cited by 31 publications

References 52 publications

Light spectrum modifies the drought-induced changes of glutathione and free amino acid levels in wheat

Light spectrum modifies the drought-induced changes of glutathione and free amino acid levels in wheat

Identification of Differentially Expressed Genes and Pathways Involved in Growth and Development of Mesona chinensis Benth Under Red- and Blue-Light Conditions

Enhancement of Antioxidant Activity and Bioactive Compounds in Eggplants Using Postharvest LEDs Irradiation

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