ArticlePlant physiology2008
PHYTOCHROME KINASE SUBSTRATE1 regulates root phototropism and gravitropism.
Article in Plant physiology, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers.
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Who cites it
36 citing papers in PubMed, 73 citations in OpenAlex.
- PKS1 involved in anthocyanin accumulation in red-skinned pear fruit.Plant cell reports · 2025Article
- Investigation ofPlant signaling & behavior · 2024Article
- Perspectives for plant biology in space and analogue environments.NPJ microgravity · 2023Review
- Local phytochrome signalling limits root growth in light by repressing auxin biosynthesis.Journal of experimental botany · 2023Article
- The Role of Light-Regulated Auxin Signaling in Root Development.International journal of molecular sciences · 2023Review
- NNature communications · 2022Article
- Root Tropisms: New Insights Leading the Growth Direction of the Hidden Half.Plants (Basel, Switzerland) · 2021Article
- The ectopic expression of Arabidopsis glucosyltransferase UGT74D1 affects leaf positioning through modulating indole-3-acetic acid homeostasis.Scientific reports · 2021Article
- Gene Expression Pattern in Olive Tree Organs (Genes · 2020Article
- Tree ring phototropism and implications for the rotation of the North China Block.Scientific reports · 2019Article
- Light and auxin signaling cross-talk programme root development in plants.Journal of biosciences · 2019Review
- Root Tropisms: Investigations on Earth and in Space to Unravel Plant Growth Direction.Frontiers in plant science · 2019Review
- A chemical genetic approach to engineer phototropin kinases for substrate labeling.The Journal of biological chemistry · 2018Article
- Light Signaling, Root Development, and Plasticity.Plant physiology · 2018Review
- LAZY Genes Mediate the Effects of Gravity on Auxin Gradients and Plant Architecture.Plant physiology · 2017Article
- Flavonols Mediate Root Phototropism and Growth through Regulation of Proliferation-to-Differentiation Transition.The Plant cell · 2016Article
- Arabidopsis phot1 and phot2 phosphorylate BLUS1 kinase with different efficiencies in stomatal opening.Journal of plant research · 2016Article
- How and why do root apices sense light under the soil surface?Frontiers in plant science · 2015Review
- Strategies of seedlings to overcome their sessile nature: auxin in mobility control.Frontiers in plant science · 2015Review
- Competing neighbors: light perception and root function.Oecologia · 2014Review
Corrections and comments
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Authors and funding
6 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Light promotes the expression of PHYTOCHROME KINASE SUBSTRATE1 (PKS1) in the root of Arabidopsis thaliana, but the function of PKS1 in this organ is unknown. Unilateral blue light induced a negative root phototropic response mediated by phototropin 1 in wild-type seedlings. This response was absent in pks1 mutants. In the wild type, unilateral blue light enhanced PKS1 expression in the subapical region of the root several hours before bending was detectable. The negative phototropism and the enhanced PKS1 expression in response to blue light required phytochrome A (phyA). In addition, the pks1 mutation enhanced the root gravitropic response when vertically oriented seedlings were placed horizontally. The negative regulation of gravitropism by PKS1 occurred even in dark-grown seedlings and did not require phyA. Blue light also failed to induce negative phototropism in pks1 under reduced gravitational stimulation, indicating that the effect of pks1 on phototropism is not simply the consequence of the counteracting effect of enhanced gravitropism. We propose a model where the background level of PKS1 reduces gravitropism. After a phyA-dependent increase in its expression, PKS1 positively affects root phototropism and both effects contribute to negative curvature in response to unilateral blue light.
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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.