{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T06:33:02Z","timestamp":1790231582586,"version":"4.1.0"},"reference-count":39,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2020,5,13]],"date-time":"2020-05-13T00:00:00Z","timestamp":1589328000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100000853","name":"University of Glasgow","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100000853","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004543","name":"China Scholarship Council","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100004543","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100000268","name":"Biotechnology and Biological Sciences Research Council","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100000268","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["nph.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["New Phytologist"],"published-print":{"date-parts":[[2020,8]]},"abstract":"<jats:title>Summary<\/jats:title><jats:p>\n<jats:list list-type=\"bullet\">\n\n<jats:list-item><jats:p>The photoreceptor UVR8 mediates numerous photomorphogenic responses of plants to UV\u2010B wavelengths by regulating transcription. Studies with purified UVR8 and seedlings not previously exposed to UV\u2010B have generated a model for UVR8 action in which dimeric UVR8 rapidly monomerises in response to UV\u2010B exposure to initiate signalling. However, the mechanism of UVR8 action in UV\u2010B\u2010acclimated plants growing under photoperiodic conditions, where UVR8 exists in a dimer\/monomer photo\u2010equilibrium, is poorly understood.<\/jats:p><\/jats:list-item>\n\n<jats:list-item><jats:p>We examined UVR8 dimer\/monomer status, gene expression responses, amounts of key UVR8 signalling proteins and their interactions with UVR8 in UV\u2010B\u2010acclimated <jats:italic>Arabidopsis<\/jats:italic>.<\/jats:p><\/jats:list-item>\n\n<jats:list-item><jats:p>We show that in UV\u2010B\u2010acclimated plants UVR8 can mediate a response to a 15\u2010fold increase in UV\u2010B without any increase in abundance of UVR8 monomer. Following transfer to elevated UV\u2010B, monomers show increased interaction with both COP1, to initiate signalling and RUP2, to maintain the photo\u2010equilibrium when the dimer\/monomer cycling rate increases. Native RUP1 is present in low abundance compared with RUP2.<\/jats:p><\/jats:list-item>\n\n<jats:list-item><jats:p>We present a model for UVR8 action in UV\u2010B\u2010acclimated plants growing in photoperiodic conditions that incorporates dimer and monomer photoreception, dimer\/monomer cycling, abundance of native COP1 and RUP proteins, and interactions of the monomer population with COP1, RUP2 and potentially other proteins.<\/jats:p><\/jats:list-item>\n<\/jats:list>\n<\/jats:p>","DOI":"10.1111\/nph.16581","type":"journal-article","created":{"date-parts":[[2020,4,7]],"date-time":"2020-04-07T13:26:15Z","timestamp":1586265975000},"page":"857-866","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":35,"title":["A dynamic model of UVR8 photoreceptor signalling in UV\u2010B\u2010acclimated 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