ArticleThe Plant cell2023
SALT OVERLY SENSITIVE2 stabilizes phytochrome-interacting factors PIF4 and PIF5 to promote Arabidopsis shade avoidance.
Article in The Plant cell, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.
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Who cites it
23 citing papers in PubMed, 46 citations in OpenAlex.
- MdPHYB2-MdPIF1 Module Regulates Transcription Factors to Mediate Light-Dependent ALA-Induced Apple Anthocyanin Biosynthesis.Plant, cell & environment · 2026Article
- Photoreceptors as central hubs of developmental plasticity and environmental adaptation.Molecules and cells · 2026Review
- CML20 integrates phytochrome and calcium signaling pathways to optimize seed germination under abiotic stress.Nature communications · 2026Article
- Genome-Wide Analysis Reveals the Roles ofInternational journal of molecular sciences · 2026Article
- Alfalfa MsSOS2 confers salinity tolerance by promoting lateral root growth and regulating NaScientific reports · 2025Article
- Hydroxylation of HPPD facilitates its PUB11-mediated ubiquitination and degradation in response to oxidative stress in Arabidopsis.Plant communications · 2025Article
- The Effect of Far-Red Light on the Growth of Tobacco Leaves.Plants (Basel, Switzerland) · 2025Article
- The phytochrome B signaling regulates salt-mediated seedling growth in the dark.Plant & cell physiology · 2025Article
- Shedding light on shade-avoidance: SlPIF8a plays a pivotal role in the tomato shade response.The Plant cell · 2025Article
- Phytochrome B-mediated light signalling enhances rice resistance to saline-alkaline and sheath blight by regulating multiple downstream transcription factors.Plant biotechnology journal · 2025Article
- SALT OVERLY SENSITIVE2 and AMMONIUM TRANSPORTER1;1 contribute to plant salt tolerance by maintaining ammonium uptake.The Plant cell · 2025Article
- Lights, location, action: shade avoidance signalling over spatial scales.Journal of experimental botany · 2025Review
- PHOSPHATASE 2A dephosphorylates PHYTOCHROME-INTERACTING FACTOR3 to modulate photomorphogenesis in Arabidopsis.The Plant cell · 2024Article
- Transcriptomics Identifies Differentially Expressed Genes Inducing Tuber Formation in Early- and Late-Maturing Potatoes.Plants (Basel, Switzerland) · 2024Article
- What is going on inside of phytochrome B photobodies?The Plant cell · 2024Review
- Unraveling the Contribution ofInternational journal of molecular sciences · 2024Article
- Functions of Phytochrome Interacting Factors (PIFs) in Adapting Plants to Biotic and Abiotic Stresses.International journal of molecular sciences · 2024Review
- Role of calcium in regulating key steps in phytochrome-induced signaling pathways.Physiology and molecular biology of plants : an international journal of functional plant biology · 2023Review
- Reconstitution of phytochrome A-mediated light modulation of the ABA signaling pathways in yeast.Proceedings of the National Academy of Sciences of the United States of America · 2023Article
- Phosphorylation of RhoGDI1, a Rho GDP dissociation inhibitor, regulates root hair development inProceedings of the National Academy of Sciences of the United States of America · 2023Article
Corrections and comments
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Authors and funding
14 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Sun-loving plants trigger the shade avoidance syndrome (SAS) to compete against their neighbors for sunlight. Phytochromes are plant red (R) and far-red (FR) light photoreceptors that play a major role in perceiving the shading signals and triggering SAS. Shade induces a reduction in the level of active phytochrome B (phyB), thus increasing the abundance of PHYTOCHROME-INTERACTING FACTORS (PIFs), a group of growth-promoting transcription factors. However, whether other factors are involved in modulating PIF activity in the shade remains largely obscure. Here, we show that SALT OVERLY SENSITIVE2 (SOS2), a protein kinase essential for salt tolerance, positively regulates SAS in Arabidopsis thaliana. SOS2 directly phosphorylates PIF4 and PIF5 at a serine residue close to their conserved motif for binding to active phyB. This phosphorylation thus decreases their interaction with phyB and posttranslationally promotes PIF4 and PIF5 protein accumulation. Notably, the role of SOS2 in regulating PIF4 and PIF5 protein abundance and SAS is more prominent under salt stress. Moreover, phyA and phyB physically interact with SOS2 and promote SOS2 kinase activity in the light. Collectively, our study uncovers an unexpected role of salt-activated SOS2 in promoting SAS by modulating the phyB-PIF module, providing insight into the coordinated response of plants to salt stress and shade.
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