Aljafer Naofel, Alrajhi Abdullah, Anderson von Trampe Toby, Vevers William, Fauset Sophie, Rihan Hail Zuhir
School of Biological and Marine Sciences, University of Plymouth, Portland Square Building, Drake Circus, Plymouth PL4 8AA, UK.
The National Research and Development Center for Sustainable Agriculture (Estidamah), Riyadh Techno Valley, King Saud University, Riyadh 12373, Saudi Arabia.
Biology (Basel). 2025 Jan 21;14(2):108. doi: 10.3390/biology14020108.
This study investigated the effects of several light spectra on analysing growth parameters, yield, and physiological responses within a controlled-environment agriculture (CEA) system. The experimental design involved different light treatments, including specific combinations of blue (435 nm and 450 nm), red (663 nm), and ultraviolet (UV) wavelengths (365 nm), to determine their impact on morphological development and biochemical properties, particularly focusing on the production of the sweetening compounds stevioside and rebaudioside A. plants cultivated from cuttings sourced from a reputable UK nursery (Gardener's Dream Ltd., Glasgow, UK) were subjected to these spectral treatments over a period of five weeks under vertical farming conditions. Physiological measurements, such as chlorophyll fluorescence (/), stomatal conductance, and leaf temperature, were recorded, alongside growth metrics (plant height, leaf area, and biomass). This study also incorporated high-performance liquid chromatography (HPLC) to quantitatively analyse the influence of the light treatments on the sweetener concentration. The results demonstrated that targeted LED spectra, particularly those that include UV light and blue light (435 nm), significantly nhanced both the quantitative and qualitative attributes of stevia growth, indicating that strategic light management can markedly improve the nutritional and commercial yields of . This research contributes to the optimisation of light conditions in vertical farming systems, aiming to enhance agricultural efficiency and reduce the reliance on imported stevia by maximising local production capabilities.
本研究调查了几种光谱对可控环境农业（CEA）系统内生长参数、产量及生理反应分析的影响。实验设计包括不同的光照处理，其中有蓝色（435纳米和450纳米）、红色（663纳米）及紫外线（UV）波长（365纳米）的特定组合，以确定它们对形态发育和生化特性的影响，尤其关注甜味化合物甜菊糖苷和莱鲍迪苷A的产生。从英国一家知名苗圃（英国格拉斯哥的园丁之梦有限公司）获取的插条培育的植物，在垂直种植条件下接受了为期五周的这些光谱处理。记录了诸如叶绿素荧光（/）、气孔导度和叶片温度等生理测量数据，以及生长指标（株高、叶面积和生物量）。本研究还采用了高效液相色谱法（HPLC）来定量分析光照处理对甜味剂浓度的影响。结果表明，有针对性的LED光谱，特别是那些包含紫外线和蓝光（435纳米）的光谱，显著提高了甜叶菊生长的数量和质量属性，这表明战略性的光照管理可以显著提高甜叶菊的营养产量和商业产量。这项研究有助于优化垂直种植系统中的光照条件，旨在通过最大化当地生产能力来提高农业效率并减少对进口甜叶菊的依赖。
