Cátia Brito, Sónia Andrade, H. Ferreira, Carlos Matos, Sandra Martins, J. Moutinho-Pereira
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These plants were then supplemented with three levels of Se: 0 mg Se kg−1 soil [0], 0.3 mg Se kg−1 soil [0.3], and 0.6 mg Se kg−1 soil [0.6]. The results showed that stomatal conductance remained unaffected by the light script. However, the plants exposed to R:B displayed more pronounced signs of photodamage and reduced net photosynthetic rate. Supplementation with Se plays a significant role in mitigating light-induced stress and in improving the antioxidant defense system; this was especially notable in R:B plants. Finally, R:B light decreased the accumulation of aboveground biomass, while no significant impact of Se was noticed on this outcome. Se accumulation exhibited a direct and proportional relationship with the concentration of Se applied. 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引用次数: 0
摘要
环保型照明系统,如 LED 灯,可以减少温室操作中的能源消耗,使用寿命长,并能通过光谱选择精确控制植物生长。另一方面,硒(Se)是一种对植物新陈代谢有益的微量营养元素,也是人类健康的必需元素。本研究旨在揭示 LED 照明与 Se 补充相结合对芝麻菜(Eruca sativa)的生理行为、产量和质量的影响。我们在受控条件下使用两种不同的 LED 灯栽培芝麻菜植株:全白光谱灯(W)和 80%/20% 红蓝光混合灯(R:B)。然后给这些植物补充三种水平的 Se:0 毫克 Se 千克-1 土壤[0]、0.3 毫克 Se 千克-1 土壤[0.3]和 0.6 毫克 Se 千克-1 土壤[0.6]。结果表明,气孔导度不受光照脚本的影响。然而,暴露于 R:B 光照下的植物表现出更明显的光损伤迹象,净光合速率降低。补充 Se 在减轻光诱导胁迫和改善抗氧化防御系统方面发挥了重要作用;这一点在 R:B 植物中尤为明显。最后,R:B 光降低了地上生物量的积累,而 Se 对这一结果没有显著影响。硒的积累与施用的硒浓度有直接的比例关系。将 LED 技术与补硒结合起来,不仅能提高作物的营养价值,还能与采用更可持续的农业实践相一致。
The Synergetic Effect of Light Spectra and Selenium Supplementation on Eruca sativa Mill. Growth and Physiological and Metabolic Responses
Eco-friendly lighting systems, like LED lights, can reduce energy consumption in greenhouse operations, have a long lifespan, and enable precise control over plant growth through spectrum selection. On the other hand, Selenium (Se) is a micronutrient with a beneficial role in plant metabolism and an essential element for human health. In this study, we aim to unravel the effects of LED lighting combined with Se supplementation on the physiological behavior, yield, and quality of arugula (Eruca sativa). Arugula plants were cultivated under controlled conditions using two distinct LED lights: full white spectrum (W) and a mix of 80%/20% of red/blue light (R:B). These plants were then supplemented with three levels of Se: 0 mg Se kg−1 soil [0], 0.3 mg Se kg−1 soil [0.3], and 0.6 mg Se kg−1 soil [0.6]. The results showed that stomatal conductance remained unaffected by the light script. However, the plants exposed to R:B displayed more pronounced signs of photodamage and reduced net photosynthetic rate. Supplementation with Se plays a significant role in mitigating light-induced stress and in improving the antioxidant defense system; this was especially notable in R:B plants. Finally, R:B light decreased the accumulation of aboveground biomass, while no significant impact of Se was noticed on this outcome. Se accumulation exhibited a direct and proportional relationship with the concentration of Se applied. The integration of LED technology and Se supplementation not only enhances crop nutritional value but also aligns with the adoption of more sustainable agricultural practices.