Lima Iury Henrique Almeida, Rodrigues Arthur Almeida, Resende Erika Crispim, da Silva Fábia Barbosa, Farnese Fernanda Dos Santos, Silva Lucas de Jesus, Rosa Márcio, Reis Mateus Neri Oliveira, Bessa Layara Alexandre, de Oliveira Thales Caetano, Januário Ana Helena, Silva Fabiano Guimarães
Laboratory of Advanced Studies in Vertical Agriculture, Goiano Federal Institute of Education, Science and Technology, Rio Verde, Brazil.
Department of Biomolecules, Goiano Federal Institute of Education, Science and Technology, Iporá, Brazil.
Front Plant Sci. 2023 Sep 4;14:1261174. doi: 10.3389/fpls.2023.1261174. eCollection 2023.
Urban vertical agriculture with lighting system can be an alternative green infrastructure to increase local food production irrespective of environmental and soil conditions. In this system, light quality control can improve the plant physiological performance, well as induce metabolic pathways that contribute to producing phenolic compounds important to human health. Therefore, this study aimed to evaluate the influence of RBW (red, blue and white) and monochromatic (red and blue; R and B, respectively) light associated or not with UV-B on photosynthetic performance and phenolic compound production in microtomato fruits cultivated via vertical agriculture. The experimental design adopted was completely randomized, with six replicates illuminated with 300 µmol·m·s light intensities (RBW, RBW + UV, B, B + UV, R, and R + UV), 12 h photoperiod, and 3.7 W·m UV-B irradiation for 1 h daily for the physiological evaluations. Twenty-six days after the installation, gas exchange, chlorophyll a fluorescence and nocturnal breathing were evaluated. Fruits in different ripening stages (green, orange, and red) were collected from microtomato plants grown under with different light qualities, to evaluate the physiological performance. The identification and quantification of the phenolic compound rutin was also performed to investigate their metabolic response. This study identified that plants grown under B + UV had high photosynthetic rates (=11.57 µmol·m·s) and the fruits at all maturation stages from plants grown under B and B + UV had high rutin content. Meanwhile, the activation of suppressive mechanisms was necessary in plants grown under R because of the high nocturnal respiration and unregulated quantum yield of the non-photochemical dissipation of the photosystem II. These results highlight the importance of selecting light wavelength for vegetable cultivation to produce fruits with a high content of specialized metabolites that influence color, flavor, and health promotion, which is of special interest to farmers using sustainable cropping systems.
配备照明系统的城市垂直农业可以成为一种替代性绿色基础设施，无论环境和土壤条件如何，都能增加当地粮食产量。在该系统中，光质控制可以改善植物的生理性能，还能诱导代谢途径，从而有助于产生对人体健康重要的酚类化合物。因此，本研究旨在评估红、蓝、白（RBW）光和单色光（分别为红光和蓝光；R和B），无论是否与UV-B光结合，对通过垂直农业种植的微型番茄果实光合性能和酚类化合物产生的影响。所采用的实验设计为完全随机设计，有六个重复，分别用300 μmol·m·s的光强（RBW、RBW + UV、B、B + UV、R和R + UV）照射，光周期为12小时，每天进行3.7 W·m的UV-B照射1小时以进行生理评估。安装后26天，评估气体交换、叶绿素a荧光和夜间呼吸。从在不同光质下生长的微型番茄植株上采集不同成熟阶段（绿色、橙色和红色）的果实，以评估其生理性能。还对酚类化合物芦丁进行了鉴定和定量，以研究它们的代谢反应。本研究发现，在B + UV光下生长的植株具有较高的光合速率（=11.57 μmol·m·s），并且在B和B + UV光下生长的植株所有成熟阶段的果实都具有较高的芦丁含量。同时，由于夜间呼吸率高以及光系统II非光化学猝灭的量子产率不受调控，在R光下生长的植株需要激活抑制机制。这些结果突出了选择光波长用于蔬菜种植以生产具有高含量特殊代谢产物的果实的重要性，这些特殊代谢产物会影响颜色、风味和促进健康，这对于使用可持续种植系统的农民特别有意义。
