ArticleThe Plant cell1998
SPA1: a new genetic locus involved in phytochrome A-specific signal transduction.
Article in The Plant cell, 1998. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 86 papers.
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Who cites it
86 citing papers in PubMed, 160 citations in OpenAlex.
- BR-ENHANCED EXPRESSION 1/2/3 fine-tune plant photomorphogenesis by regulating the phyA/B-SPA1 cascade.The Plant cell · 2026Article
- Involvement of the Light Signalling Components HY5 and BIC1,2 and SPA1 in Plant Responses to Elevated Daytime UV-B Doses.International journal of molecular sciences · 2026Article
- Article
- Functional Characterization of OsCSN1 in the Agronomic Trait Control of Rice Seedlings Under Far-Red Light.International journal of molecular sciences · 2025Article
- Light signaling in plants-a selective history.Plant physiology · 2024Review
- Soybean reduced internode 1 determines internode length and improves grain yield at dense planting.Nature communications · 2023Article
- PH13 improves soybean shade traits and enhances yield for high-density planting at high latitudes.Nature communications · 2023Article
- Arabidopsis homeobox-leucine zipper transcription factor BRASSINOSTEROID-RELATED HOMEOBOX 3 regulates leaf greenness by suppressing BR signaling.Plant biotechnology (Tokyo, Japan) · 2022Article
- Article
- Genomic evidence reveals SPA-regulated developmental and metabolic pathways in dark-grown Arabidopsis seedlings.Physiologia plantarum · 2020Article
- Genetic and molecular basis of floral induction in Arabidopsis thaliana.Journal of experimental botany · 2020Review
- A phyB-PIF1-SPA1 kinase regulatory complex promotes photomorphogenesis in Arabidopsis.Nature communications · 2019Article
- Comparative transcription analysis of photosensitive and non-photosensitive eggplants to identify genes involved in dark regulated anthocyanin synthesis.BMC genomics · 2019Article
- Transcriptome profiling of genes related to light-induced anthocyanin biosynthesis in eggplant (Solanum melongena L.) before purple color becomes evident.BMC genomics · 2018Article
- FIN219/JAR1 and cryptochrome1 antagonize each other to modulate photomorphogenesis under blue light in Arabidopsis.PLoS genetics · 2018Article
- Light Controls Cytokinin Signaling via Transcriptional Regulation of Constitutively Active Sensor Histidine Kinase CKI1.Plant physiology · 2017Article
- Light behind the curtain: photoregulation of nuclear architecture and chromatin dynamics in plants.The New phytologist · 2016Article
- MYB75 Phosphorylation by MPK4 Is Required for Light-Induced Anthocyanin Accumulation in Arabidopsis.The Plant cell · 2016Article
- Review
- The functional divergence between SPA1 and SPA2 in Arabidopsis photomorphogenesis maps primarily to the respective N-terminal kinase-like domain.BMC plant biology · 2016Article
26 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
3 authors at 2 institutions in 1 country.
Funding
Abstract
To identify mutants potentially defective in signaling intermediates specific to phytochrome A (phyA), we screened for extragenic mutations that suppress the morphological phenotype exhibited by a weak phyA mutant (phyA-105) of Arabidopsis. A new recessive mutant, designated spa1 (for suppressor of phyA-105), was isolated and mapped to the bottom of chromosome 2. spa1 phyA-105 double mutants exhibit restoration of several responses to limiting fluence rates of continuous far-red light that are absent in the parental phyA-105 mutant, such as deetiolation, anthocyanin accumulation, and a far-red light-induced inability of seedlings to green upon subsequent transfer to continuous white light. spa1 mutations do not cause a phenotype in darkness, indicating that the suppression phenotype is light dependent. Enhanced photoresponsiveness was observed in spa1 seedlings in a wild-type PHYA background as well as in the mutant phyA-105 background but not in a mutant phyA null background. These results indicate that phyA is necessary in a non-allele-specific fashion for the expression of the spa1 mutant phenotype and that phyB to phyE are not sufficient for this effect. Taken together, the data suggest that spa1 mutations specifically amplify phyA signaling and therefore that the SPA1 locus encodes a component that acts negatively early in the phyA-specific signaling pathway.
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Registered trials
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.