ArticlePlant physiology2014
Both PHYTOCHROME RAPIDLY REGULATED1 (PAR1) and PAR2 promote seedling photomorphogenesis in multiple light signaling pathways.
Article in Plant physiology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 39 papers.
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39 citing papers in PubMed, 76 citations in OpenAlex.
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- Shade avoidance syndrome in soybean and ideotype toward shade tolerance.Molecular breeding : new strategies in plant improvement · 2023Article
- Article
- PIFs- and COP1-HY5-mediated temperature signaling in higher plants.Stress biology · 2022Review
- Development and carotenoid synthesis in dark-grown carrot taproots require PHYTOCHROME RAPIDLY REGULATED1.Plant physiology · 2022Article
- Article
- RNA-Seq and Gene Ontology Analysis Reveal Differences Associated With Low R/FR-Induced Shade Responses in Cultivated Lentil and a Wild Relative.Frontiers in genetics · 2022Article
- Monoseeding Increases Peanut (Plants (Basel, Switzerland) · 2021Article
- The transcription factor SlHY5 regulates the ripening of tomato fruit at both the transcriptional and translational levels.Horticulture research · 2021Article
- Understanding the Shade Tolerance Responses Through Hints From Phytochrome A-Mediated Negative Feedback Regulation in Shade Avoiding Plants.Frontiers 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
- Article
- AtINO80 represses photomorphogenesis by modulating nucleosome density and H2A.Z incorporation in light-related genes.Proceedings of the National Academy of Sciences of the United States of America · 2020Article
- A Gas-and-Brake Mechanism of bHLH Proteins Modulates Shade Avoidance.Plant physiology · 2020Article
- A de novo transcriptome analysis revealed that photomorphogenic genes are required for carotenoid synthesis in the dark-grown carrot taproot.Molecular genetics and genomics : MGG · 2020Article
- The bHLH network underlying plant shade-avoidance.Physiologia plantarum · 2020Review
- AtHSPR is involved in GA- and light intensity-mediated control of flowering time and seed set in Arabidopsis.Journal of experimental botany · 2020Article
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Authors and funding
12 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Arabidopsis (Arabidopsis thaliana) seedlings undergo photomorphogenesis in the light and etiolation in the dark. Light-activated photoreceptors transduce the light signals through a series of photomorphogenesis promoting or repressing factors to modulate many developmental processes in plants, such as photomorphogenesis and shade avoidance. CONSTITUTIVE PHOTOMORPHOGENIC1 (COP1) is a conserved RING finger E3 ubiquitin ligase, which mediates degradation of several photomorphogenesis promoting factors, including ELONGATED HYPOCOTYL5 (HY5) and LONG HYPOCOTYL IN FAR-RED1 (HFR1), through a 26S proteasome-dependent pathway. PHYTOCHROME RAPIDLY REGULATED1 (PAR1) was first detected as an early repressed gene in both phytochrome A (phyA)-mediated far-red and phyB-mediated red signaling pathways, and subsequent studies showed that both PAR1 and PAR2 are negative factors of shade avoidance in Arabidopsis. However, the role of PAR1 and PAR2 in seedling deetiolation, and their relationships with other photomorphogenesis promoting and repressing factors are largely unknown. Here, we confirmed that both PAR1 and PAR2 redundantly enhance seedling deetiolation in multiple photoreceptor signaling pathways. Their transcript abundances are repressed by phyA, phyB, and cryptochrome1 under far-red, red, and blue light conditions, respectively. Both PAR1 and PAR2 act downstream of COP1, and COP1 mediates the degradation of PAR1 and PAR2 through the 26S proteasome pathway. Both PAR1 and PAR2 act in a separate pathway from HY5 and HFR1 under different light conditions, except for sharing in the same pathway with HFR1 under far-red light. Together, our results substantiate that PAR1 and PAR2 are positive factors functioning in multiple photoreceptor signaling pathways during seedling deetiolation.
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