Photobodies in Light Signaling

Plant development and growth are extremely plastic in response to changes in ambient light conditions. Light is not only the ultimate energy source for photosynthesis; its physical parameters, such as quality, intensity, direction, and duration, also serve as key environmental and time cues Therefore, it is vital for plants to closely monitor and precisely respond to changes in light properties in order to optimize growth under a wide range of ecological environments and to synchronize developmental transitions with diurnal and seasonal time. Plants have evolved to "see" the light spectrum between 280 and 750 nm, which spans UV-B, UV-A, and visible light, through five classes of photoreceptors. In the reference plant Arabidopsis (Arabidopsis thaliana), they include the newly determined UV-B receptor UV RESISTANCE LOCUS8 (UVR8;