The Effect of LED light combination on the anthocyanin expression of lettuce

This study conducted twice the growing of lettuce in DFT system and aeroponics method with different light combinations.(1) Deep flow technique system(DFT) : The lettuce was grown in DFT system and taken image. Then image analysis and absorbance was analyzed to know the correlation.(2) Aeroponics system : From the image of grown lettuce and HPLC, the contents of the major functional elements of anthocyanin - cyanidin-3-glucoside(C3G), peonidin-3-glucoside(P3G), and delphinidin-3-glucoside(D3G) - were measured. As a result, it turned out that in the light combination of red 53: blue 47, red 58: blue 42, the content of D3G was the highest.Through the twice experiments, the content of anthocyanin may be estimated based on the imaging data to some extent. This study shows that blue light has significant effects on the development of anthocyanin.