ArticleThe Plant cell2012
Nuclear phytochrome A signaling promotes phototropism in Arabidopsis.
Article in The Plant cell, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.
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Who cites it
22 citing papers in PubMed, 57 citations in OpenAlex.
- The action of enhancing weak light capture via phototropic growth and chloroplast movement in plants.Stress biology · 2022Review
- Genomic basis of parallel adaptation varies with divergence inProceedings of the National Academy of Sciences of the United States of America · 2021Article
- Cryptochrome-mediated hypocotyl phototropism was regulated antagonistically by gibberellic acid and sucrose in Arabidopsis.Journal of integrative plant biology · 2020Article
- Article
- Deetiolation Enhances Phototropism by Modulating NON-PHOTOTROPIC HYPOCOTYL3 Phosphorylation Status.Plant physiology · 2019Article
- A phosphorylation switch turns a positive regulator of phototropism into an inhibitor of the process.Nature communications · 2018Article
- FHY3 and FAR1 Act Downstream of Light Stable Phytochromes.Frontiers in plant science · 2016Article
- Holophytochrome-Interacting Proteins in Physcomitrella: Putative Actors in Phytochrome Cytoplasmic Signaling.Frontiers in plant science · 2016Article
- Phytochrome A Mediates Blue-Light Enhancement of Second-Positive Phototropism in Arabidopsis.Frontiers in plant science · 2016Article
- Molecular mechanisms for mediating light-dependent nucleo/cytoplasmic partitioning of phytochrome photoreceptors.The New phytologist · 2015Review
- Strategies of seedlings to overcome their sessile nature: auxin in mobility control.Frontiers in plant science · 2015Review
- PINOID AGC kinases are necessary for phytochrome-mediated enhancement of hypocotyl phototropism in Arabidopsis.Plant physiology · 2014Article
- Plasma membrane H⁺ -ATPase regulation is required for auxin gradient formation preceding phototropic growth.Molecular systems biology · 2014Article
- HUA ENHANCER1 is involved in posttranscriptional regulation of positive and negative regulators in Arabidopsis photomorphogenesis.The Plant cell · 2014Article
- Arabidopsis Phytochrome A Directly Targets Numerous Promoters for Individualized Modulation of Genes in a Wide Range of Pathways.The Plant cell · 2014Article
- Phototropin 1 and dim-blue light modulate the red light de-etiolation response.Plant signaling & behavior · 2014Article
- Phototropism: some history, some puzzles, and a look ahead.Plant physiology · 2014Review
- Phototropism: growing towards an understanding of plant movement.The Plant cell · 2014Article
- Aureochrome 1a is involved in the photoacclimation of the diatom Phaeodactylum tricornutum.PloS one · 2013Article
- An evolutionarily conserved signaling mechanism mediates far-red light responses in land plants.The Plant cell · 2013Article
Corrections and comments
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Authors and funding
7 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Phototropin photoreceptors (phot1 and phot2 in Arabidopsis thaliana) enable responses to directional light cues (e.g., positive phototropism in the hypocotyl). In Arabidopsis, phot1 is essential for phototropism in response to low light, a response that is also modulated by phytochrome A (phyA), representing a classical example of photoreceptor coaction. The molecular mechanisms underlying promotion of phototropism by phyA remain unclear. Most phyA responses require nuclear accumulation of the photoreceptor, but interestingly, it has been proposed that cytosolic phyA promotes phototropism. By comparing the kinetics of phototropism in seedlings with different subcellular localizations of phyA, we show that nuclear phyA accelerates the phototropic response, whereas in the fhy1 fhl mutant, in which phyA remains in the cytosol, phototropic bending is slower than in the wild type. Consistent with this data, we find that transcription factors needed for full phyA responses are needed for normal phototropism. Moreover, we show that phyA is the primary photoreceptor promoting the expression of phototropism regulators in low light (e.g., PHYTOCHROME KINASE SUBSTRATE1 [PKS1] and ROOT PHOTO TROPISM2 [RPT2]). Although phyA remains cytosolic in fhy1 fhl, induction of PKS1 and RPT2 expression still occurs in fhy1 fhl, indicating that a low level of nuclear phyA signaling is still present in fhy1 fhl.
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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.