ArticleThe Plant cell2004
The transparent testa4 mutation prevents flavonoid synthesis and alters auxin transport and the response of Arabidopsis roots to gravity and light.
Article in The Plant cell, 2004. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 168 papers.
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168 citing papers in PubMed, 399 citations in OpenAlex.
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- A high-throughput fluorescence-based microplate reader assay to quantify total flavonol levels in plant tissues.Plant methods · 2026Article
- Antioxidant properties of dihydroxy B-ring flavonoids modulate circadian amplitude inLife science alliance · 2025Article
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- Autofluorescence and Metabotyping of Soybean Varieties Using Confocal Laser Microscopy and High-Resolution Mass Spectrometric Approaches.Plants (Basel, Switzerland) · 2025Article
- Innovative screening for mutants affected in seed oil/protein allocation identifies TRANSPARENT TESTA7 as a regulator of oil accumulation.The Plant journal : for cell and molecular biology · 2025Article
- Metabolomic Analysis Provides Insights into Bud Paradormancy inInternational journal of molecular sciences · 2025Article
- Characterization and functional analysis of type III polyketide synthases in Selaginella moellendorffii.Planta · 2025Article
- Investigation of the reproducibility of the treatment efficacy of a commercial bio stimulant using metabolic profiling on flax.Metabolomics : Official journal of the Metabolomic Society · 2024Article
- UDP-glucosyltransferase 71C4 controls the flux of phenylpropanoid metabolism to shape cotton seed development.Plant communications · 2024Article
- Transcriptional response of Arabidopsis thaliana's root-tip to spaceflight.Plant molecular biology · 2024Article
- NMR and LC-MS-based metabolomics to investigate the efficacy of a commercial bio stimulant for the treatment of wheat (Triticum aestivum).Metabolomics : Official journal of the Metabolomic Society · 2024Article
- Transcriptional regulation of flavonol biosynthesis in plants.Horticulture research · 2024Review
- Genome-wide association studies identify loci controlling specialized seed metabolites in Arabidopsis.Plant physiology · 2024Article
- Article
108 more citing papers are in PubMed but not listed here.
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2 authors at 1 institution in 1 country.
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Abstract
We examined whether flavonoids act as endogenous auxin transport regulators during gravity vector and light intensity changes in Arabidopsis thaliana roots. Flavonoid deficient transparent testa4 [tt4(2YY6)] seedlings had elevated root basipetal auxin transport compared with the wild type, consistent with the absence of a negative auxin transport regulator. The tt4(2YY6) roots had delayed gravitropism that was chemically complemented with a flavonoid intermediate. Flavonoid accumulation was found in wild-type columella cells, the site of gravity perception, and in epidermal and cortical cells, the site of differential growth, but flavonoid accumulation was absent in tt4(2YY6) roots. Flavonoid accumulation was higher in gravity-stimulated root tips as compared with vertical controls, with maximum differences coinciding with the timing of gravitropic bending, and was located in epidermal cells. Exogenous indole-3-acetic acid (IAA) also elevated flavonoid accumulation, suggesting that flavonoid changes in response to gravity might be partly as a result of changing IAA distribution. Acropetal IAA transport was also elevated in roots of tt4(2YY6). Flavonoid synthesis was repressed in the dark, as were differences in root acropetal transport in tt4(2YY6). These results are consistent with light- and gravity-induced flavonoid stimulation that alters auxin transport in roots and dependent physiological processes, including gravitropic bending and root development.
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