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As a result, plants have evolved an array of strategies to protect themselves from UV radiation, particularly in the UV-B range (280\u2013320\u2009nm). A common plant response to UV exposure is investment in phenolic compounds that absorb damaging wavelengths of light. However, the inverse phenomenon \u2013 plant reflectance of UV to protect plant tissues \u2013 has not previously been explored. In a paired experiment, we expose half of our sample (<jats:italic>N<\/jats:italic>\u2009=\u2009108) of insect-pollinated plants of the cultivar <jats:italic>Zinnia<\/jats:italic> Profusion Series to UV radiation, and protect the other half from all light &lt;\u2009400\u2009nm for 42\u2009days, and measure leaf and flower reflectance using spectroscopy. We compare UV-B reflectance in leaves and flowers at the beginning of the experiment or flowering, and after treatment.<\/jats:p>\n<\/jats:sec><jats:sec>\n<jats:title>Results<\/jats:title>\n<jats:p>We find that plants protected from UV exposure downregulate UV-B reflectance, and that plants exposed to increased levels of UV show trends of increased UV-B reflectance.<\/jats:p>\n<\/jats:sec><jats:sec>\n<jats:title>Conclusions<\/jats:title>\n<jats:p>Our results indicate that upregulation of UV-B reflecting pigments or structures may be a strategy to protect leaves against highly energetic UV-B radiation.<\/jats:p>\n<\/jats:sec>","DOI":"10.1186\/s12870-020-02471-8","type":"journal-article","created":{"date-parts":[[2020,6,3]],"date-time":"2020-06-03T14:34:16Z","timestamp":1591194856000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":22,"title":["Ultraviolet radiation changes plant color"],"prefix":"10.1186","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9843-0698","authenticated-orcid":false,"given":"Kim","family":"Valenta","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kristin","family":"Dimac-Stohl","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Frances","family":"Baines","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Todd","family":"Smith","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Greg","family":"Piotrowski","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Norman","family":"Hill","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jonas","family":"Kuppler","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Omer","family":"Nevo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2020,6,3]]},"reference":[{"issue":"1","key":"2471_CR1","doi-asserted-by":"publisher","first-page":"88","DOI":"10.1039\/C4PP90034K","volume":"14","author":"JF Bornman","year":"2015","unstructured":"Bornman JF, Barnes PW, Robinson SA, Ballare CL, Flint S, Caldwell MM. 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