Cited by 114Light effects on plantsPlant Molecular Biology ResearchPlant Parasitism and Resistance

Arabidopsis fhl / fhy1 double mutant reveals a distinct cytoplasmic action of phytochrome A

Open access
Rösler, Jutta, Klein, Ilse, Zeidler, Mathias·2007·Proceedings of the National Academy of Sciences

Abstract

Phytochrome A (phyA) plays an important role during germination and early seedling development. Because phyA is the primary photoreceptor for the high-irradiance response and the very-low-fluence response, it can trigger development not only in red and far-red (FR) light but also in a wider range of light qualities. Although phyA action is generally associated with translocation to the nucleus and regulation of transcription, there is evidence for additional cytoplasmic functions. Because nuclear accumulation of phyA has been shown to depend on far-red-elongated hypocotyl 1 (FHY1) and FHL (FHY1-like), investigation of phyA function in a double fhl/fhy1 mutant might be valuable in revealing the mechanism of phyA translocation and possible cytoplasmic functions. In fhl/fhy1 , the FR-triggered nuclear translocation of phyA could no longer be detected but could be restored by transgenic expression of CFP:FHY1 . Whereas the fhl/fhy1 mutant showed a phyA phenotype in respect to hypocotyl elongation and cotyledon opening under high-irradiance response conditions as well as a typical phyA germination phenotype under very-low-fluence response conditions, fhl/fhy1 showed no phenotype with respect to the phyA-dependent abrogation of negative gravitropism in blue light and in red-enhanced phototropism, demonstrating clear cytoplasmic functions of phyA. Disturbance of phyA nuclear import in fhl/fhy1 led to formation of FR-induced phyA:GFP cytoplasmic foci resembling the sequestered areas of phytochrome. FHY1 and FHL play crucial roles in phyA nuclear translocation and signaling. Thus the double-mutant fhl/fhy1 allows nuclear and cytoplasmic phyA functions to be separated, leading to the novel identification of cytoplasmic phyA responses.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1073/pnas.0703855104

Cites

46 of 48 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Red light-activated phytochromes can inhibit blue light-induced migration of PHOT1 to the cytoplasm.

    “Red light-activated phytochromes can inhibit blue light-induced migration of PHOT1 to the cytoplasm. (Rosler et al., 2007; Han et al., 2008).”

    From The action of enhancing weak light capture via phototropic growth and chloroplast movement in plants (2022) · cites this paper as Rosler et al., 2007

    The Results describe red-light-enhanced phototropism, and the Discussion says PHOT1 and phyA may be linked through PKS1. Neither passage addresses whether red-light-activated phytochromes inhibit blue-light-induced PHOT1 migration to the cytoplasm. Searches for PHOT1 migration and translocation found no passage establishing that effect. (LLM, conf=0.73)

    Experimental — accuracy not yet measured

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Research works printed but not linked: 4

  1. [25]Fairchild CD, Schumaker MA, Quail PH. Genes Dev. 2000;14:2377–2391. [PMC free article] [PubMed] [Google Scholar]
  2. [31]Quail PH. In: Encyclopedia of Plant Physiol. Shropshire W Jr, Mohr H, editors. Vol 16. Heidelberg: Springer; 1983. pp. 178–212. Book A. [Google Scholar]
  3. [47]Sheen J. Plant Physiol. 2001;127:1466–1475. [PMC free article] [PubMed] [Google Scholar]
  4. [48]Sambrook J, Russel D, editors. Molecular Cloning: A Laboratory Manual. Plainview, NY: Cold Spring Harbor Lab Press; 2001. p. A9.28. [Google Scholar]

Cited by

Sorted by citations

Authors
Rösler, J., Klein, I., & Zeidler, M.
Affiliations
  • Justus-Liebig-Universität Gießen (DE)
  • Carnegie Institution for Science (US)
Corresponding author
Zeidler, Mathias
Venue
Proceedings of the National Academy of Sciences
Published
2007-06-19
Volume
104
Issue
25
Pages
10737-10742
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2096295687
Cited by
114
References
47
Citations by year
2026: 3 · 2025: 7 · 2023: 4 · 2022: 5 · 2021: 5 · 2020: 3 · 2019: 4 · 2018: 7 · 2017: 1 · 2016: 4 · 2015: 3 · 2014: 10 · 2013: 8 · 2012: 13
FWCI
10.94
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
Deutsche Forschungsgemeinschaft
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
phytochrome A, nuclear translocation, far-red light, high irradiance response, hypocotyl elongation, cotyledon opening, gravitropism, phototropism, Arabidopsis thaliana, double mutants
MeSH terms
Cytoplasm, Mutation, Recombinant Fusion Proteins, Arabidopsis, Hypocotyl, Transgenes, Arabidopsis Proteins, Plants, Genetically Modified, Green Fluorescent Proteins, Phytochrome A

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review