ArticleJournal of experimental botany2013
Phytochrome-induced SIG2 expression contributes to photoregulation of phytochrome signalling and photomorphogenesis in Arabidopsis thaliana.
Article in Journal of experimental botany, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.
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Who cites it
21 citing papers in PubMed, 30 citations in OpenAlex.
- Arogenate dehydratases: unique roles in light-directed development during the seed-to-seedling transition inFrontiers in plant science · 2023Article
- Anterograde signaling controls plastid transcription via sigma factors separately from nuclear photosynthesis genes.Nature communications · 2022Article
- Plant photoreceptors and their signalling components in chloroplastic anterograde and retrograde communication.Journal of experimental botany · 2022Article
- Phytochrome-Dependent Regulation ofFrontiers in plant science · 2022Article
- Guard-cell phytochromes impact seedling photomorphogenesis and rosette leaf morphology.microPublication biology · 2022Article
- Article
- Changes in plastid biogenesis leading to the formation of albino regenerants in barley microspore culture.BMC plant biology · 2021Article
- Daytime temperature is sensed by phytochrome B in Arabidopsis through a transcriptional activator HEMERA.Nature communications · 2019Article
- Transcription is a major driving force for plastid genome instability in Arabidopsis.PloS one · 2019Article
- Mesophyll-specific phytochromes impact chlorophyll light-harvesting complexes (LHCs) and non-photochemical quenching.Plant signaling & behavior · 2019Article
- LLM-Domain B-GATA Transcription Factors Play Multifaceted Roles in Controlling Greening in Arabidopsis.The Plant cell · 2018Article
- Transcriptome and phenotyping analyses support a role for chloroplast sigma factor 2 in red-light-dependent regulation of growth, stress, and photosynthesis.Plant direct · 2018Article
- A quantitative model of the phytochrome-PIF light signalling initiating chloroplast development.Scientific reports · 2017Article
- Phytochrome and retrograde signalling pathways converge to antagonistically regulate a light-induced transcriptional network.Nature communications · 2016Article
- Regulatory modules controlling early shade avoidance response in maize seedlings.BMC genomics · 2016Article
- A Shortest-Path-Based Method for the Analysis and Prediction of Fruit-Related Genes in Arabidopsis thaliana.PloS one · 2016Article
- Spatiotemporal Phytochrome Signaling during Photomorphogenesis: From Physiology to Molecular Mechanisms and Back.Frontiers in plant science · 2016Review
- Regulation of Carotenoid Biosynthesis by Shade Relies on Specific Subsets of Antagonistic Transcription Factors and Cofactors.Plant physiology · 2015Article
- Leaf Variegation of Thylakoid Formation1 Is Suppressed by Mutations of Specific σ-Factors in Arabidopsis.Plant physiology · 2015Article
- Interdependence of tetrapyrrole metabolism, the generation of oxidative stress and the mitigative oxidative stress response.Redox biology · 2015Review
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2 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Chloroplast-localized sigma factor (SIG) proteins promote specificity of the plastid-encoded RNA polymerase. SIG2 function appears to be necessary for light-grown Arabidopsis thaliana plants. Specific photoreceptors or light-dependent factors that impact the light-induced accumulation of SIG2 have not been reported. A molecular link between phytochromes and nuclear-encoded SIG2, which impacts photomorphogenesis specifically under red (R) and far-red (FR) light, is described here. Both phyA and phyB promote SIG2 transcript accumulation. Disruption of SIG2 results in R- and FR-specific defects in the inhibition of hypocotyl elongation and cotyledon expansion, although no impairments in these responses are detected for sig2 mutants under blue (B) or white (W) light. SIG2 also impacts root elongation under W and R, and the R-dependent expression of PIF4, encoding a phytochrome-interacting factor, and HY2, which encodes a phytochrome chromophore biosynthetic enzyme. Whereas SIG2 apparently impacts the accumulation of the phytochromobilin (PΦB) phytochrome chromophore, sig2 mutants differ significantly from PΦB mutants, primarily due to wavelength-specific defects in photomorphogenesis and disruption of a distinct subset of phytochrome-dependent responses. The molecular link between phytochromes and SIG2 is likely to be an important part of the co-ordination of gene expression to maintain stoichiometry between the nuclear-encoded phytochrome apoprotein and plastid-derived PΦB, which combine to form photoactive phytochromes, and/or light-dependent SIG2 accumulation is involved in an inductive light signalling pathway co-ordinating components between nucleus and plastids.
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