ArticleJournal of experimental botany2023
Local phytochrome signalling limits root growth in light by repressing auxin biosynthesis.
Article in Journal of experimental botany, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed, 15 citations in OpenAlex.
- Photoreceptors as central hubs of developmental plasticity and environmental adaptation.Molecules and cells · 2026Review
- Genome-wide identification and expression analysis of the PnNPR-PnTGA gene family reveal its potential role in response to biotic stresses in Panax notoginseng.BMC plant biology · 2026Article
- Molecular mechanisms of root expansion in medicinal plants.Frontiers in plant science · 2026Review
- Phytochrome E Plays a Role in the Suppression of Germination in Far-Red Light in Tomato.Plant direct · 2025Article
- Light regulates the synthesis and accumulation of plant secondary metabolites.Frontiers in plant science · 2025Review
- Two pyridoxal phosphate homeostasis proteins are essential for management of the coenzyme pyridoxal 5'-phosphate in Arabidopsis.The Plant cell · 2024Article
- The role of light in regulating plant growth, development and sugar metabolism: a review.Frontiers in plant science · 2024Review
- Functional dissection of phytochrome A in plants.Frontiers in plant science · 2024Review
Corrections and comments
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
In nature, plant shoots are exposed to light whereas the roots grow in relative darkness. Surprisingly, many root studies rely on in vitro systems that leave the roots exposed to light whilst ignoring the possible effects of this light on root development. Here, we investigated how direct root illumination affects root growth and development in Arabidopsis and tomato. Our results show that in light-grown Arabidopsis roots, activation of local phytochrome A and B by far-red or red light inhibits respectively PHYTOCHROME INTERACTING FACTORS 1 or 4, resulting in decreased YUCCA4 and YUCCA6 expression. As a result, auxin levels in the root apex become suboptimal, ultimately resulting in reduced growth of light-grown roots. These findings highlight once more the importance of using in vitro systems where roots are grown in darkness for studies that focus on root system architecture. Moreover, we show that the response and components of this mechanism are conserved in tomato roots, thus indicating its importance for horticulture as well. Our findings open up new research possibilities to investigate the importance of light-induced root growth inhibition for plant development, possibly by exploring putative correlations with responses to other abiotic signals, such as temperature, gravity, touch, or salt stress.
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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.