The spectral light influence on young ornamental plants’ resistance to short-term cold stress

LED light sources allow for variations in the spectral composition which makes it possible to evaluate the effect of light with narrow spectral width on plants performance. The combination of such lighting with natural lighting can significantly change the direction and intensity of metabolic processes in plants to adapt to changing environmental conditions. In the present paper, we showed for the first time that additional illumination with narrow-spectrum light allows the seedlings of ornamental plants to successfully adapt to cold stress. The aim of our work was to estimate the effect of red light (600 nm) and blue light (400 nm) from LED panels on adaptation of tagetes ( Tagetis panula L.) cultivar Karmen, snapdragon ( Antirrhinum majus nanum L.) cultivar Flora shower white and petunias ( Petunia hybrida L.) cultivar Mambo blue seedlings to spring frosts when transplanting to open ground. These plants are often used in landscaping settlements and are exposed to low positive and zero temperatures, especially in the first days after transplanting to open ground...