ArticleThe Plant cell2022
SMAX1 potentiates phytochrome B-mediated hypocotyl thermomorphogenesis.
Article in The Plant cell, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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Who cites it
16 citing papers in PubMed, 27 citations in OpenAlex.
- A group of TCP transcription factors is a missing link in strigolactone signaling.Journal of integrative plant biology · 2026Article
- Removing the smoke screen of SMAX1 and SMXL2's role in seedling growth.The Plant cell · 2026Article
- Divergent strigolactones or karrikins signaling is mediated by preferred AtD14/KAI2-MAX2-SMXL complex targeting specific SMXL domains.iScience · 2026Article
- Genome-Wide Identification and Characterization of theInternational journal of molecular sciences · 2026Article
- SMXL3 controls multiple aspects of Arabidopsis development via EAR motif-dependent and -independent functions.The Plant journal : for cell and molecular biology · 2026Article
- An N-terminal domain specifies developmental control by the SMAX1-LIKE family of transcriptional regulators inProceedings of the National Academy of Sciences of the United States of America · 2025Article
- The Multifaceted Impact of Karrikin Signaling in Plants.International journal of molecular sciences · 2025Review
- Structural requirements of KAI2 ligands for activation of signal transduction.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- An integrated physiological indicator and transcriptomic analysis reveals the response of soybean buds to high-temperature stress.BMC plant biology · 2024Article
- Suppression of SMXL4 and SMXL5 confers enhanced thermotolerance through promoting HSFA2 transcription in Arabidopsis.The Plant cell · 2024Article
- HTL/KAI2 signaling substitutes for light to control plant germination.PLoS genetics · 2024Article
- SUPPRESSOR OF MAX2 1-LIKE (SMXL) homologs are MAX2-dependent repressors of Physcomitrium patens growth.The Plant cell · 2024Article
- Karrikin signalling: impacts on plant development and abiotic stress tolerance.Journal of experimental botany · 2024Article
- KAI2 Can Do: Karrikin Receptor Function in Plant Development and Response to Abiotic and Biotic Factors.Plant & cell physiology · 2023Article
- PIFs- and COP1-HY5-mediated temperature signaling in higher plants.Stress biology · 2022Review
- Not too short and not too long: SMAX1 optimizes hypocotyl length at warmer temperature.The Plant cell · 2022Article
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Authors and funding
3 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Plant thermosensors help optimize plant development and architecture for ambient temperatures, and morphogenic adaptation to warm temperatures has been extensively studied in recent years. Phytochrome B (phyB)-mediated thermosensing and the gene regulatory networks governing thermomorphogenic responses are well understood at the molecular level. However, it is unknown how plants manage their responsiveness to fluctuating temperatures in inducing thermomorphogenic behaviors. Here, we demonstrate that SUPPRESSOR OF MAX2 1 (SMAX1), known as a karrikin signaling repressor, enhances the thermosensitivity of hypocotyl morphogenesis in Arabidopsis thaliana. Hypocotyl thermomorphogenesis was largely disrupted in SMAX1-deficient mutants. SMAX1 interacts with phyB to alleviate its suppressive effects on the transcription factor activity of PHYTOCHROME-INTERACTING FACTOR 4 (PIF4), promoting hypocotyl thermomorphogenesis. Interestingly, the SMAX1 protein is slowly destabilized at warm temperatures, preventing hypocotyl overgrowth. Our findings indicate that the thermodynamic control of SMAX1 abundance serves as a molecular gatekeeper for phyB function in thermosensitizing PIF4-mediated hypocotyl morphogenesis.
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