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Photomorphogenesis is a process plants use as a response to changes in light throughout the day.It is a process whereby plants react to the availability of light.It can result in morphological changes It is found throughout multiple domains such as Monera, Protista, and Plantae altough an abundance of research is most documented in plants.

UV-B

A plant can exhibit photomorphogenic changes as a result of UV-B  radiation. Plants have photoreceptors that initiates morphogenetic changes to the plant embryo (hypocotyl, epicotyl, radicle). Exposure to UV- light in plants mediates biochemical pathways, photosynthesis, plant growth and many other processes essential to plant development. The UV-B photoreceptor, UV RESISTANCE LOCUS8 (UVR8) detects UV-B rays and elicits photomorphogenic responses. These response are important for initiating hypocotyl elongation, leaf expansion, biosynthesis of flavonoids and many other important processes that affect the root-shoot system. Exposure to UV-B rays can be damaging to DNA inside of the plant cells ,however, UVR8 induces genes required to acclimate plants to UV-B radiation, these genes are responsible for many biosynthesis pathways that involve protection from UV damage, oxidative stress, and photorepair of DNA damage.

Not much is understood about the mechanisms involved in UV-B radiation. and how UVR8 responds to natural solar light. Scientists are working to understand the pathways responsible for plant UV receptors response to solar radiation.