ArticleThe Plant cell2013
Arabidopsis phytochrome B promotes SPA1 nuclear accumulation to repress photomorphogenesis under far-red light.
Article in The Plant cell, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 51 papers.
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Who cites it
51 citing papers in PubMed, 90 citations in OpenAlex.
- Rewiring the unfolded protein response for plant growth recovery after stress.Plant communications · 2026Review
- Twenty-five years of photobodies: formation, composition, and the 2-compartment logic of phytochrome B signaling.Plant physiology · 2026Review
- The ZmCOP1s-ZmCOL3 Module Enhances Late Flowering, Grain Yield and Grain Quality in Maize.Plant biotechnology journal · 2026Article
- Sensing and Filtering Environmental Fluctuations: The Case of Biomolecular Condensates in Plants.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026Review
- The Photoreceptors Phototropin 1 and Phytochrome B Mediate Moonlight Perception and Response inPlants (Basel, Switzerland) · 2026Article
- Article
- Static Magnetic Field Promotes Wheat Nitrogen Assimilation by Repressing Jasmonates Biosynthesis Through TaHY5.Plant biotechnology journal · 2026Article
- PHYB and PIF3 repress OLE4 expression to regulate hypocotyl length and ABA signaling in Arabidopsis.BMC plant biology · 2025Article
- Proximity proteomics reveals the molecular architecture of phytochrome B photobodies inbioRxiv : the preprint server for biology · 2025Article
- The core morning clock component CCA1 enhances UPR target gene expression to facilitate ER stress recovery.Plant communications · 2025Article
- TheProceedings of the National Academy of Sciences of the United States of America · 2025Article
- Lights, location, action: shade avoidance signalling over spatial scales.Journal of experimental botany · 2025Review
- The PHYB-FOF2-VOZ2 module functions to fine-tune flowering in response to changes in light quality by modulating FLC expression in Arabidopsis.Plant communications · 2024Article
- What is going on inside of phytochrome B photobodies?The Plant cell · 2024Review
- The phosphorylation of carboxyl-terminal eIF2α by SPA kinases contributes to enhanced translation efficiency during photomorphogenesis.Nature communications · 2024Article
- Light signaling as cellular integrator of multiple environmental cues in plants.Physiology and molecular biology of plants : an international journal of functional plant biology · 2023Review
- Blue light receptor CRY1 regulates HSFA1d nuclear localization to promote plant thermotolerance.Cell reports · 2023Article
- Phytochromes enhance SOS2-mediated PIF1 and PIF3 phosphorylation and degradation to promote Arabidopsis salt tolerance.The Plant cell · 2023Article
- Phytochrome B photobodies are comprised of phytochrome B and its primary and secondary interacting proteins.Nature communications · 2023Article
- Article
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Authors and funding
13 authors at 4 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Phytochrome A (phyA) is the primary photoreceptor mediating deetiolation under far-red (FR) light, whereas phyB predominantly regulates light responses in red light. SUPPRESSOR OF PHYA-105 (SPA1) forms an E3 ubiquitin ligase complex with CONSTITUTIVE PHOTOMORPHOGENIC1 (COP1), which is responsible for the degradation of various photomorphogenesis-promoting factors, resulting in desensitization to light signaling. However, the role of phyB in FR light signaling and the regulatory pathway from light-activated phytochromes to the COP1-SPA1 complex are largely unknown. Here, we confirm that PHYB overexpression causes an etiolation response with reduced ELONGATED HYPOCOTYL5 (HY5) accumulation under FR light. Notably, phyB exerts its nuclear activities and promotes seedling etiolation in both the presence and absence of phyA in response to FR light. PhyB acts upstream of SPA1 and is functionally dependent on it in FR light signaling. PhyB interacts and forms a protein complex with SPA1, enhancing its nuclear accumulation under FR light. During the dark-to-FR transition, phyB is rapidly imported into the nucleus and facilitates nuclear SPA1 accumulation. These findings support the notion that phyB plays a role in repressing FR light signaling. Activity modulation of the COP1-SPA E3 complex by light-activated phytochromes is an effective and pivotal regulatory step in light signaling.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.