Potential Application of Light Emitting Diodes (LEDs) to Improve Molecular, Physiological and Growth Responses in Peppermint Plant

JSFA reports Pub Date : 2023-12-06 DOI:10.1002/jsf2.177
Mostafa Khazaeie, Fariba Rafiei, M. Sabzalian, Saadollah Houshmand
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Abstract

Climate change and growing global population are driving forces that shift the agriculture from open fields to environmentally‐controlled confined systems. In such confined systems, plants are adapted to unique light spectra to achieve maximal qualitative and quantitative yields. In the present study, effects of five light spectra on morpho‐physiological and molecular attributes of peppermint were examined. Treatments included a traditional greenhouse considered as the control, a fluorescent light, and four types of light emitting diodes (LED): red, blue, red‐blue (70:30), and white. Leaf samples were collected from plants and analyzed for volatile constituents using a headspace GC–MS. Meanwhile, changes in the expression profile of genes involved in the biosynthesis of menthol were evaluated.Our results showed that maximal yield (wet and dry biomass) was achieved under greenhouse condition and the red‐blue LED. Application of the red‐blue LED resulted in maximal production of beneficial monoterpenes, which indicate superiority to greenhouse environment. A significant change in the gene expression profile was observed among plants grown under different light treatments. The red‐blue LED was associated with a significant up‐regulation of key genes in the menthol biosynthesis (menthol dehydrogenase and pulegone reductase). This phenomenon was consistent with a higher menthol production under the same condition.The application of red‐blue LED was associated with the highest level of yield and menthol production whereas it resulted in lower concentrations of unfavorable by‐products (iso‐menthol, cis‐pulegone, and menthofuran). In conclusion, 70:30 red‐blue LED can be satisfactory applied to maximize growth yield and optimize favorable bioactive constituent in peppermint.This article is protected by copyright. All rights reserved.
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发光二极管(LED)在改善薄荷植物的分子、生理和生长反应方面的潜在应用
气候变化和不断增长的全球人口正在推动农业从露天农田转向环境控制的密闭系统。在这样的密闭系统中,植物适应了独特的光谱,以达到最大的定性和定量产量。研究了不同光谱对薄荷形态生理和分子特性的影响。处理包括一个传统温室作为对照,一个荧光灯和四种发光二极管(LED):红色、蓝色、红蓝(70:30)和白色。采集植物叶片样品,采用顶空GC-MS分析挥发性成分。同时,对薄荷醇生物合成相关基因的表达谱变化进行了评价。我们的研究结果表明,在温室条件下和红蓝LED下实现了最大产量(湿生物量和干生物量)。红蓝LED的应用产生了最大的有益单萜烯,表明其在温室环境中的优势。不同光照条件下植株的基因表达谱发生了显著变化。红蓝色LED与薄荷醇生物合成中关键基因(薄荷醇脱氢酶和普莱酮还原酶)的显著上调有关。这种现象与相同条件下薄荷醇产量较高一致。红蓝LED的应用与最高的产量和薄荷醇产量相关,但它导致较低浓度的不利副产物(异薄荷醇、顺式薄荷酮和薄荷呋喃)。综上所述,70:30的红蓝LED可以很好地应用于薄荷的生长产量最大化和有利生物活性成分的优化。这篇文章受版权保护。版权所有。
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