In addition to changes in overall light intensity, plants, like other organisms, are sensitive to UV radiation, an important stressor that plants must cope with in nature (Jansen et al., 1998; Wolf et al., 2010). An array of cellular components are damaged by absorption of UV-B radiation (280 – 315 nm), including components of the photosynthetic apparatus (Teramura and Sullivan, 1994; Jansen et al., 1998). UV-B triggers the production of carotenoids (Middleton and Teramura, 1993), and some of the same high-light photoprotective mechanisms can also protect plants from UV radiation. For example, it was demonstrated that zeaxanthin contributes to UV stress protection and damage prevention in tobacco (Götz et al., 2002). Additionally, some plants have evolved UV-absorbing chemical sunscreens that reduce the amount of UV reaching sensitive molecules.