Cited by 82Light effects on plantsPlant Molecular Biology ResearchPlant Parasitism and Resistance

Photoreceptor-Mediated Bending towards UV-B in Arabidopsis

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Vandenbussche, Filip, Tilbrook, Kimberley, Fierro, Ana Carolina, Marchal, Kathleen, Poelman, Dirk, Van Der Straeten, Dominique, Ulm, Roman·2014·Molecular Plant

Abstract

Plants reorient their growth towards light to optimize photosynthetic light capture--a process known as phototropism. Phototropins are the photoreceptors essential for phototropic growth towards blue and ultraviolet-A (UV-A) light. Here we detail a phototropic response towards UV-B in etiolated Arabidopsis seedlings. We report that early differential growth is mediated by phototropins but clear phototropic bending to UV-B is maintained in phot1 phot2 double mutants. We further show that this phototropin-independent phototropic response to UV-B requires the UV-B photoreceptor UVR8. Broad UV-B-mediated repression of auxin-responsive genes suggests that UVR8 regulates directional bending by affecting auxin signaling. Kinetic analysis shows that UVR8-dependent directional bending occurs later than the phototropin response. We conclude that plants may use the full short-wavelength spectrum of sunlight to efficiently reorient photosynthetic tissue with incoming light.

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Crossref · 10.1093/mp/ssu039

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  • Single mutant of IAA7 and IAA17 also exhibit a phototropism-deficient phenotype, suggesting that auxin signaling is necessary for blue light-induced phototropism.

    “Recent studies showed that single mutant of IAA7 and IAA17 also exhibit a phototropism-deficient phenotype, suggesting that auxin signaling is necessary for blue light-induced phototropism (Vandenbussche et al., 2014).”

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Authors
Vandenbussche, F., Tilbrook, K., Fierro, A. C., Marchal, K., Poelman, D., Van Der Straeten, D., & Ulm, R.
Affiliations
  • Ghent University (BE)
  • University of Geneva (CH)
  • KU Leuven (BE)
Corresponding author
Vandenbussche, Filip
Venue
Molecular Plant
Publisher
Elsevier BV
Published
2014-06
Volume
7
Issue
6
Pages
1041-1052
ISSN
1674-2052 (ISSN-L)
OpenAlex
W1972196899
Cited by
82
References
59
Citations by year
2026: 3 · 2025: 6 · 2024: 4 · 2023: 4 · 2022: 7 · 2021: 7 · 2020: 12 · 2019: 12 · 2018: 3 · 2017: 8 · 2016: 7 · 2015: 6 · 2014: 3
FWCI
9.34
Type
journal article
Language
en
Open access
Locations
  • Molecular Plant (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • Archive ouverte UNIGE (University of Geneva) (publishedVersion)
  • Ghent University Academic Bibliography (Ghent University) (submittedVersion)
  • Archive ouverte UNIGE (University of Geneva) (submittedVersion, cc-by)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Light effects on plants
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Molecular Biology Research
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Parasitism and Resistance
Keywords
phototropism, phototropin, UVR8, auxin signaling, etiolated seedlings, short-wavelength light, Arabidopsis thaliana, photoreceptors
MeSH terms
Ultraviolet Rays, Arabidopsis, Gene Expression Regulation, Plant, Phototropism, Arabidopsis Proteins

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