UV-B photoreceptor; Arabidopsis thaliana; sunflecks; photomorphogenesis
Tissot Nicolas, Ulm Roman (2020), Cryptochrome-mediated blue-light signalling modulates UVR8 photoreceptor activity and contributes to UV-B tolerance in Arabidopsis, in Nature Communications
, 11(1), 1323-1323.
Podolec Roman, Ulm Roman (2018), Photoreceptor-mediated regulation of the COP1/SPA E3 ubiquitin ligase, in Current Opinion in Plant Biology
, 45, 18-25.
Moriconi Victoria, Binkert Melanie, Costigliolo Cecilia, Sellaro Romina, Ulm Roman, Casal Jorge J (2018), Perception of Sunflecks by the UV-B Photoreceptor UV RESISTANCE LOCUS8., in Plant physiology
, 177(1), 75-81.
Demarsy Emilie, Goldschmidt-Clermont Michel, Ulm Roman (2018), Coping with ‘Dark Sides of the Sun’ through Photoreceptor Signaling, in Trends in Plant Science
, 23(3), 260-271.
Forest understory plants, as well as lower plant parts in high-density agricultural cropping systems, experience a highly dynamic light environment. These plants, or parts of them, are heavily shaded during most of the day, but are suddenly exposed to strong sunlight for brief and often predictable periods. These so-called sunflecks are short, intermittent periods of high photon flux density that strongly contribute to photosynthesis in shaded habitats. Thus, sunflecks are ecophysiologically and agriculturally highly important as source of energy for carbon gain; however, a molecular understanding of how plant organs perceive and respond to sunflecks is scarce. In particular, how plants cope with the sudden exposure to potentially damaging ultraviolet-B radiation (UV-B) intrinsic to sunflecks has not been investigated yet. Next to the visible light photoreceptors, plants contain a specific UV-B photoreceptor UVR8 that regulates many UV-B responses in plants and that contributes to establish UV-B acclimation and stress tolerance. The overall aim of this joint research project is to investigate the molecular mechanisms involved in the perception of natural sunflecks by plants and the function of UVR8 in this process.