Effects of preharvest lighting conditions on phenolic compounds and colour of radish microgreens: Cultivar-specific responses
This study examined how lighting conditions (White, or a combination of Red + Blue LEDs; and supplemental UV-C: 0, 1 or 3 applications) and cultivars (Daikon, Red Rambo) affected the colour, total phenolics content, antioxidant activity and individual polyphenols of radish microgreens (Raphanus sati...
| Autores: | , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/397263 |
| Acceso en línea: | http://hdl.handle.net/10261/397263 https://api.elsevier.com/content/abstract/scopus_id/105009622002 |
| Access Level: | acceso embargado |
| Palabra clave: | Lighting Polyphenols Precision agriculture Precision nutrition Raphanus sativus L Sustainable cultivation |
| Sumario: | This study examined how lighting conditions (White, or a combination of Red + Blue LEDs; and supplemental UV-C: 0, 1 or 3 applications) and cultivars (Daikon, Red Rambo) affected the colour, total phenolics content, antioxidant activity and individual polyphenols of radish microgreens (Raphanus sativus L.) in a sustainable vertical farming system, as well as the implications for polyphenolic intake, connecting agronomic practices with consumption. Light treatments preserved the visual appearance of all cultivars (ΔE < 4.4), maintaining market acceptance. Individual compounds varied slightly between cultivars, along with their responses the different lighting conditions. Considering 100 g fresh microgreens, Red Rambo provided higher levels of polyphenols (155–188 mg 100 g<sup>−1</sup>) than Daikon (113–127 mg 100 g<sup>−1</sup>), as well as higher antioxidant activity and total phenolics content, irrespective of growing light conditions. The choice of LED light during cultivation also significantly impacted polyphenolic levels: generally, White LEDs, optimized with 1 application of UV-C, favoured phenolic production in Daikon, while Red + Blue LEDs were more effective for Red Rambo regardless of UV-C. Sinapoyl malate was the most abundant compound in both cultivars. Red Rambo also provide complex anthocyanins, whose levels (69–80 mg 100 g<sup>−1</sup> total anthocyanins) are enhanced by Red + Blue LEDs, making this cultivar grown under this LED combination a particularly appealing option with greater potential health benefits. These findings highlight the value of microgreens amid growing consumer interest, as sustainable, visually appealing, and bioactive compound-rich foods that support daily vegetable intake |
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