The present invention provides a process for increasing the flavonoid content of a plant wherein said process comprises increasing the activity of chalcone synthase and flavonol synthase therein. The closure region 13 receives a closure element 4 which is removably secured to the closure region 13. In the liquid crystal panel, when incident light having a divergence angle component with respect to the optical axis emerges from the microlens, the divergence angle component is removed. The present invention is applicable to camera-integrated video recorders or digital still cameras.