Cited by 79Light effects on plantsPlant Molecular Biology ResearchPlant Parasitism and Resistance

Role of the phytochrome and cryptochrome signaling pathways in hypocotyl phototropism: Role of phy and cry in phototropism

Tsuchida-Mayama, Tomoko, Sakai, Tatsuya, Hanada, Atsushi, Uehara, Yukiko, Asami, Tadao, Yamaguchi, Shinjiro·2010·The Plant Journal

Abstract

Unilateral blue-light irradiation activates phototropin (phot) photoreceptors, resulting in asymmetric distribution of the phytohormone auxin and induction of a phototropic response in higher plants. Other photoreceptors, including phytochrome (phy) and cryptochrome (cry), have been proposed as modulators of phototropic responses. We show here that either phy or cry is required for hypocotyl phototropism in Arabidopsis thaliana under high fluence rates of blue light, and that constitutive expression of ROOT PHOTOTROPISM 2 (RPT2) and treatment with the phytohormone gibberellin (GA) biosynthesis inhibitor paclobutrazol partially and independently complement the non-phototropic hypocotyl phenotype of the phyA cry1 cry2 mutant under high fluence rates of blue light. Our results indicate that induction of RPT2 and reduction in the GA are crucial for hypocotyl phototropic regulation by phy and cry. We also show that GA suppresses hypocotyl bending via destabilization of DELLA transcriptional regulators under darkness, but does not suppress the phototropic response in the presence of either phyA or cryptochromes, suggesting that these photoreceptors control not only the GA content but also the GA sensing and/or signaling that affects hypocotyl phototropism. The metabolic and signaling regulation of not only auxin but also GA by photoreceptors therefore appears to determine the hypocotyl growth pattern, including phototropic and gravitropic responses and inhibition of hypocotyl elongation, for adaptation to various light environments.

Integrity signals

Registry

Crossref · 10.1111/j.1365-313x.2010.04180.x

Cites

50 of 50 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

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?

  • In etiolated Arabidopsis seedlings, phytochromes and cryptochromes mediate red- and blue light-induced RPT2 expression, respectively, and affect phototropism by regulating RPT2 expression.

    “In etiolated Arabidopsis seedlings, phytochromes and cryptochromes mediate red- and blue light-induced RPT2 expression, respectively, and affect phototropism by regulating RPT2 expression (Sakai et al., 2000; Tsuchida-Mayama et al., 2010).”
  • Mutating both phytochromes and cryptochromes in Arabidopsis resulted in severe phototropism loss, suggesting that, in addition to phototropin, phytochromes and cryptochromes are involved in regulating phototropism in plants.

    “Mutating both phytochromes and cryptochromes in Arabidopsis resulted in severe phototropism loss (Ohgishi et al., 2004; Tsuchida-Mayama et al., 2010; Zhao et al., 2020), suggesting that, in addition to phototropin, phytochromes and cryptochromes are involved in regulating phototropism in plants.”

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Tsuchida-Mayama, T., Sakai, T., Hanada, A., Uehara, Y., Asami, T., & Yamaguchi, S.
Affiliations
  • Japan Science and Technology Agency (JP)
  • RIKEN (JP)
  • The University of Tokyo (JP)
Corresponding author
Sakai, Tatsuya
Venue
The Plant Journal
Publisher
Wiley
Published
2010-02-24
Volume
62
Issue
4
Pages
653-662
ISSN
  • 0960-7412 (ISSN-L)
  • 1365-313X
OpenAlex
W2113138120
Cited by
79
References
50
Citations by year
2026: 1 · 2025: 4 · 2024: 5 · 2023: 4 · 2022: 5 · 2021: 5 · 2020: 7 · 2019: 3 · 2018: 5 · 2017: 3 · 2016: 3 · 2015: 3 · 2014: 6 · 2013: 8 · 2012: 8
FWCI
9.62
Type
journal article
Language
en
Open access
closed
Locations
  • The Plant Journal (publishedVersion)
  • PubMed (publishedVersion)
Funders
Arizona Biomedical Research Commission
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, cryptochrome, photoreceptors, auxin, gibberellin, Rpt2, paclobutrazol, blue light, gravitropism, Arabidopsis thaliana
MeSH terms
Gibberellins, Phytochrome, Signal Transduction, Arabidopsis, Phototropism, Hypocotyl, Arabidopsis Proteins, Cryptochromes

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