UV-B perception and signalling in plants

Plant Molecular Biology

Sunlight is of utmost importance to plants, not only as energy source but also as an environmental signal regulating growth and development. An important and increasing part of the incident sunlight encompasses a segment of the ultraviolet-B region (UV-B; 280-315 nm) that is not entirely absorbed by the ozone layer in the stratosphere of the Earth. UV-B radiation is potentially harmful for any organism exposed to it, but is also used as an informational signal for which plants have evolved specific and sensitive UV-B perception systems promoting UV-B acclimation and tolerance. Our understanding of this UV-B sensory pathway is presently limited to a small number of major players, and even less is known on their interplay, regulations and mechanisms of action. The major aim of our laboratory is a better understanding of UV-B perception and signalling in plants that leads to UV-B acclimation and survival.

Recent Publications

  • Arabidopsis RUP2 represses UVR8-mediated flowering in noninductive photoperiods
    Arongaus, AB; Chen, S; Pireyre, M; Glockner, N; Galvao, VC; Albert, A; Winkler, JB; Fankhauser, C; Harter, K; Ulm, R
    GENES & DEVELOPMENT, 32 (19-20):1332-1343; 10.1101/gad.318592.118 OCT 1 2018
  • Photoreceptor-mediated regulation of the COP1-SPA E3 ubiquitin ligase complex
    Podolec, Roman and Ulm, Roman
    Curr. Opin. Plant Biol. 45: 18-25, https://doi.org/10.1016/j.pbi.2018.04.018 MAY 2018
  • Coping with 'Dark Sides of the Sun' through Photoreceptor Signaling 
    Demarsy, Emilie; Goldschmidt-Clermont, Michel; Ulm, Roman 
    TRENDS IN PLANT SCIENCE, 23 (3):260-271; https://doi.org/10.1016/j.tplants.2017.11.007 MAR 2018
  • Perception of sunflecks by the UV-B photoreceptor UV RESISTANCE LOCUS 8
    Victoria Moriconi, Melanie Binkert, MarĂ­a Cecilia Costigliolo Rojas, Romina Sellaro, Roman Ulm, Jorge Jose Casal
    Plant Physiology, https://doi.org/10.1104/pp.18.00048
  • How plants cope with UV-B: from perception to response 
    Yin, Ruohe; Ulm, Roman 
    CURRENT OPINION IN PLANT BIOLOGY, 37: 42-48, 10.1016/j.pbi.2017.03.013   JUN 2017 
  • Expression of the UVR8 photoreceptor in different tissues reveals tissue-autonomous features of UV-B signalling 
    Bernula, Peter; Crocco, Carlos Daniel; Arongaus, Adriana Beatriz; et al. 
    PLANT CELL AND ENVIRONMENT, 40 (7): 1104-1114, 10.1111/pce.12904 JUL 2017
  • UV-B photoreceptor-mediated protection of the photosynthetic machinery in Chlamydomonas reinhardtii 
    Allorent, Guillaume; Lefebvre-Legendre, Linnka; Chappuis, Richard; et al. 
    ROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 113 (51): 14864-14869, 10.1073/pnas.1607695114  DEC 20 2016

Roman Ulm Uni Geneva

Prof. Dr. Roman Ulm
University of Geneva
Department of Botany and Plant Biology
1211 Geneva

Tel: +41 (0)22 379 36 50

Research topics

  • UV-B response
  • Photomorphogenesis
  • MAP kinase phosphatases
  • Abiotic stress responses

 

Interdisciplinary

  • Photobiology
  • Environmental stress signalling