Effect of different LED light quality combination on the content of vitamin C, soluble sugar, organic acids, amino acids, antioxidant capacity and mineral elements in green onion (Allium fistulosum L.).
Food research international (Ottawa, Ont.)(2022)
Abstract
The effects of blue-white, green-white, yellow-white, and red-white light combinations on the nutrient composition and antioxidant capacity of pseudo-stems and leaves of 'Yuanzang' green onion were investigated using light-emitting diodes (LEDs) with precise modulation of light quality, using white light as the control. The results showed that the leaf pigment, vitamin C, soluble sugar, organic acids, free amino acids, mineral elements, and antioxidant levels were significantly higher in green onion under blue-white combined light treatment, followed by white and red-white combined light, while green-white and yellow-white combined light significantly reduced fruit quality and antioxidant capacity. In conclusion, supplementation with blue LED light was the most effective light condition to improve palatability, nutritional value, and storage resistance of green onion by enhancing various nutrients in the plants, increasing antioxidant levels, and delaying plant aging.
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