Advanced search
1 file | 3.42 MB

Role of Arabidopsis UV RESISTANCE LOCUS 8 in plant growth reduction under osmotic stress and low levels of UV-B

(2014) MOLECULAR PLANT. 7(5). p.773-791
Author
Organization
Project
Biotechnology for a sustainable economy (Bio-Economy)
Abstract
In high-light environments, plants are exposed to different types of stresses, such as an excess of UV-B, but also drought stress which triggers a common morphogenic adaptive response resulting in a general reduction of plant growth. Here, we report that the Arabidopsis thaliana UV RESISTANCE LOCUS 8 (UVR8) gene, a known regulator of the UV-B morphogenic response, was able to complement a Saccharomyces cerevisiae osmo-sensitive mutant and its expression was induced after osmotic or salt stress in Arabidopsis plants. Under low levels of UV-B, plants overexpressing UVR8 are dwarfed with a reduced root development and accumulate more flavonoids compared to control plants. The growth defects are mainly due to the inhibition of cell expansion. The growth inhibition triggered by UVR8 overexpression in plants under low levels of UV-B was exacerbated by mannitol-induced osmotic stress, but it was not significantly affected by ionic stress. In contrast, uvr8-6 mutant plants do not differ from wild-type plants under standard conditions, but they show an increased shoot growth under high-salt stress. Our data suggest that UVR8-mediated accumulation of flavonoid and possibly changes in auxin homeostasis are the underlying mechanism of the observed growth phenotypes and that UVR8 might have an important role for integrating plant growth and stress signals.
Keywords
MEDIATED RESPONSES, ABIOTIC STRESSES, PROTEIN PHOSPHATASES, INDUCED PHOTOMORPHOGENESIS, MORPHOGENIC RESPONSES, DROUGHT STRESS, AUXIN TRANSPORT, LATERAL ROOT INITIATION, ARABIDOPSIS-THALIANA, auxin, flavonoid, cell expansion, growth reduction, osmotic stress, SIGNAL-TRANSDUCTION

Downloads

  • (...).pdf
    • full text
    • |
    • UGent only
    • |
    • PDF
    • |
    • 3.42 MB

Citation

Please use this url to cite or link to this publication:

Chicago
Fasano, Rossella, Nathalie Gonzalez Sanchez, Alessandro Tosco, Fabrizio Dal Piaz, Teresa Docimo, Ramon Serrano, Stefania Grillo, Antonella Leone, and Dirk Inzé. 2014. “Role of Arabidopsis UV RESISTANCE LOCUS 8 in Plant Growth Reduction Under Osmotic Stress and Low Levels of UV-B.” Molecular Plant 7 (5): 773–791.
APA
Fasano, R., Gonzalez Sanchez, N., Tosco, A., Dal Piaz, F., Docimo, T., Serrano, R., Grillo, S., et al. (2014). Role of Arabidopsis UV RESISTANCE LOCUS 8 in plant growth reduction under osmotic stress and low levels of UV-B. MOLECULAR PLANT, 7(5), 773–791.
Vancouver
1.
Fasano R, Gonzalez Sanchez N, Tosco A, Dal Piaz F, Docimo T, Serrano R, et al. Role of Arabidopsis UV RESISTANCE LOCUS 8 in plant growth reduction under osmotic stress and low levels of UV-B. MOLECULAR PLANT. 2014;7(5):773–91.
MLA
Fasano, Rossella, Nathalie Gonzalez Sanchez, Alessandro Tosco, et al. “Role of Arabidopsis UV RESISTANCE LOCUS 8 in Plant Growth Reduction Under Osmotic Stress and Low Levels of UV-B.” MOLECULAR PLANT 7.5 (2014): 773–791. Print.
@article{4419967,
  abstract     = {In high-light environments, plants are exposed to different types of stresses, such as an excess of UV-B, but also drought stress which triggers a common morphogenic adaptive response resulting in a general reduction of plant growth. Here, we report that the Arabidopsis thaliana UV RESISTANCE LOCUS 8 (UVR8) gene, a known regulator of the UV-B morphogenic response, was able to complement a Saccharomyces cerevisiae osmo-sensitive mutant and its expression was induced after osmotic or salt stress in Arabidopsis plants. Under low levels of UV-B, plants overexpressing UVR8 are dwarfed with a reduced root development and accumulate more flavonoids compared to control plants. The growth defects are mainly due to the inhibition of cell expansion. The growth inhibition triggered by UVR8 overexpression in plants under low levels of UV-B was exacerbated by mannitol-induced osmotic stress, but it was not significantly affected by ionic stress. In contrast, uvr8-6 mutant plants do not differ from wild-type plants under standard conditions, but they show an increased shoot growth under high-salt stress. Our data suggest that UVR8-mediated accumulation of flavonoid and possibly changes in auxin homeostasis are the underlying mechanism of the observed growth phenotypes and that UVR8 might have an important role for integrating plant growth and stress signals.},
  author       = {Fasano, Rossella and Gonzalez Sanchez, Nathalie and Tosco, Alessandro and Dal Piaz, Fabrizio and Docimo, Teresa and Serrano, Ramon and Grillo, Stefania and Leone, Antonella and Inz{\'e}, Dirk},
  issn         = {1674-2052},
  journal      = {MOLECULAR PLANT},
  keyword      = {MEDIATED RESPONSES,ABIOTIC STRESSES,PROTEIN PHOSPHATASES,INDUCED PHOTOMORPHOGENESIS,MORPHOGENIC RESPONSES,DROUGHT STRESS,AUXIN TRANSPORT,LATERAL ROOT INITIATION,ARABIDOPSIS-THALIANA,auxin,flavonoid,cell expansion,growth reduction,osmotic stress,SIGNAL-TRANSDUCTION},
  language     = {eng},
  number       = {5},
  pages        = {773--791},
  title        = {Role of Arabidopsis UV RESISTANCE LOCUS 8 in plant growth reduction under osmotic stress and low levels of UV-B},
  url          = {http://dx.doi.org/10.1093/mp/ssu002},
  volume       = {7},
  year         = {2014},
}

Altmetric
View in Altmetric
Web of Science
Times cited: