ArticlePlant physiology2012
Arabidopsis COP1 and SPA genes are essential for plant elongation but not for acceleration of flowering time in response to a low red light to far-red light ratio.
Article in Plant physiology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.
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Who cites it
27 citing papers in PubMed, 63 citations in OpenAlex.
- Analysis of Targeted Supplemental-Waveband Lighting to Increase Yield and Quality of Lettuce Grown Indoors.Plants (Basel, Switzerland) · 2025Article
- How Histone Acetyltransferases Shape Plant Photomorphogenesis and UV Response.International journal of molecular sciences · 2024Review
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- Shade avoidance syndrome in soybean and ideotype toward shade tolerance.Molecular breeding : new strategies in plant improvement · 2023Article
- Shade avoidance in the context of climate change.Plant physiology · 2023Article
- Genetic Dissection of Light-Regulated Adventitious Root Induction inInternational journal of molecular sciences · 2022Article
- Basic Protein Modules Combining Abscisic Acid and Light Signaling inFrontiers in plant science · 2021Review
- Illuminating the COP1/SPA Ubiquitin Ligase: Fresh Insights Into Its Structure and Functions During Plant Photomorphogenesis.Frontiers in plant science · 2021Review
- HY5 and phytochrome activity modulate shoot-to-root coordination during thermomorphogenesis inDevelopment (Cambridge, England) · 2020Article
- Species-independent analytical tools for next-generation agriculture.Nature plants · 2020Review
- HY5 Suppresses, Rather Than Promotes, Abscisic Acid-Mediated Inhibition of Postgermination Seedling Development.Plant physiology · 2020Article
- Coordinated Shoot and Root Responses to Light Signaling inPlant communications · 2020Review
- Rapid metabolite response in leaf blade and petiole as a marker for shade avoidance syndrome.Plant methods · 2020Article
- UVR8 disrupts stabilisation of PIF5 by COP1 to inhibit plant stem elongation in sunlight.Nature communications · 2019Article
- Auxin-Dependent Cell Elongation During the Shade Avoidance Response.Frontiers in plant science · 2019Review
- Beyond Light: Insights Into the Role of Constitutively Photomorphogenic1 in Plant Hormonal Signaling.Frontiers in plant science · 2019Review
- Multiple Pathways in the Control of the Shade Avoidance Response.Plants (Basel, Switzerland) · 2018Review
- SPA Proteins Affect the Subcellular Localization of COP1 in the COP1/SPA Ubiquitin Ligase Complex during Photomorphogenesis.Plant physiology · 2017Article
- Cryptochromes Orchestrate Transcription Regulation of Diverse Blue Light Responses in Plants.Photochemistry and photobiology · 2017Review
- FAR-RED INSENSITIVE 219/JAR1 Contributes to Shade Avoidance Responses ofFrontiers in plant science · 2017Article
Corrections and comments
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Authors and funding
5 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Plants sense vegetative shade as a reduction in the ratio of red light to far-red light (R:FR). Arabidopsis (Arabidopsis thaliana) responds to a reduced R:FR with increased elongation of the hypocotyl and the leaf petioles as well as with an acceleration of flowering time. The repressor of light signaling, CONSTITUTIVELY PHOTOMORPHOGENIC1 (COP1), has been shown previously to be essential for the shade-avoidance response in seedlings. Here, we have investigated the roles of COP1 and the COP1-interacting SUPPRESSOR OF PHYA-105 (SPA) proteins in seedling and adult facets of the shade-avoidance response. We show that COP1 and the four SPA genes are essential for hypocotyl and leaf petiole elongation in response to low R:FR, in a fashion that involves the COP1/SPA ubiquitination target LONG HYPOCOTYL IN FR LIGHT1 but not ELONGATED HYPOCOTYL5. In contrast, the acceleration of flowering in response to a low R:FR was normal in cop1 and spa mutants, thus demonstrating that the COP1/SPA complex is only required for elongation responses to vegetative shade and not for shade-induced early flowering. We further show that spa mutant seedlings fail to exhibit an increase in the transcript levels of the auxin biosynthesis genes YUCCA2 (YUC2), YUC8, and YUC9 in response to low R:FR, suggesting that an increase in auxin biosynthesis in vegetative shade requires SPA function. Consistent with this finding, expression of the auxin-response marker gene DR5::GUS did not increase in spa mutant seedlings exposed to low R:FR. We propose that COP1/SPA activity, via LONG HYPOCOTYL IN FR LIGHT1, is required for shade-induced modulation of the auxin biosynthesis pathway and thereby enhances cell elongation in low R:FR.
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