数字农科院2.0

Effect of Light Conditions on Growth and Antioxidant Parameters of Two Hydroponically Grown Lettuce Cultivars (Green and Purple) in a Vertical Farm System

文献类型： 外文期刊

作者： Cristian Hernández-Adasme;María José Guevara;María Auxiliadora Faicán-Benenaula;Rodrigo Neira;Dakary Delgadillo;Violeta Muñoz;Carolina Salazar-Parra;Bo Sun;Xiao Yang;Víctor Hugo Escalona

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关键词： antioxidant capacity;flavonoids;intensity;LED light;NDVI;phenolic;spectrum

期刊名称： Horticulturae

ISSN： 2311-7524

年卷期： 2025 年 11 卷 2 期

页码：

收录情况： SCIE（2025版）

摘要： The use of extended light spectra, including UV-A, green, and far-red, has been scarcely explored in vertical farming. This study evaluated the effects of full spectra under two intensities (90 and 180 µmol m−2 s−1) on the growth and antioxidant properties of green and purple leaf lettuce. Three light spectra were tested: Blue-White (BW), Red-White (RW), and Red-Blue (RB). Fresh weight (FW), dry weight percentage (DWP), chlorophyll concentration (NDVI), and antioxidant parameters (total phenolic content (TPC), antioxidant capacity by DPPH and FRAP and total flavonoid content (TFC)) were assessed. Spectrum-intensity interactions significantly influenced FW, with RW-180 µmol m−2 s−1 yielding the highest FW (78.2 g plant−1 in green and 48.5 g plant−1 in purple lettuce). BW-90 µmol m−2 s−1 maximized DWP in green lettuce, while PAR intensity of 180 µmol m−2 s−1 favored DWP in purple lettuce. Chlorophyll concentration increased under PAR intensity of 180 µmol m−2 s−1, and leaf color varied with spectrum, with RW producing lighter leaves. Antioxidant parameters declined over time, but a PAR intensity of 180 µmol m−2 s−1, particularly under RW, boosted TPC and TFC contents in both lettuce cultivars during early stages (days 0 and 15). Conversely, a lower PAR intensity of 90 µmol m−2 s−1, mainly under RW, enhanced antioxidant capacity by FRAP at 15 days and by the end of the cycle for both cultivars. Overall, RW-180 µmol m−2 s−1 interactions promoted the best characteristics in lettuce. Nonetheless, the findings emphasize the significance of fine-tuning both light spectrum and intensity to enhance lettuce growth and quality in vertical farming systems considering the cultivar, time and variable to be evaluated.

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