Abstract
Rosmarinic acid (RA), a kind of the polyphenols, attracts attention as a material letting pollinosis and allergy reduce. Our study has previously shown that continuous red light let RA increase. In addition, there is another unknown material showing antioxidant activity influenced by light. We investigated the variation of light condition to identify their contents and relevance to antioxidant activity. As a result, RA increased in order of white, red, and blue, which meant the red involved in both white and red light let much RA increase effectively. The other was increased in order of white, blue, and red, and was mainly influenced by blue. Each antioxidant activity and polyphenol content increased most by white. These results suggest that continuous white light is effective in increasing polyphenols including RA, which lead to the high antioxidant activity. Furthermore, we will present gene expression analysis of RA biosynthesis pathway, especially TAT and CYP98A6.
