ArticlePlant cell reports2015
GA(3) enhances root responsiveness to exogenous IAA by modulating auxin transport and signalling in Arabidopsis.
Article in Plant cell reports, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.
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Who cites it
20 citing papers in PubMed, 69 citations in OpenAlex.
- Gibberellin transport affects lateral root growth through HY5 in response to far-red light.The Plant cell · 2025Article
- Gibberellin-deactivating GA2OX enzymes act as a hub for auxin-gibberellin cross talk inProceedings of the National Academy of Sciences of the United States of America · 2025Article
- Overexpression of CassavaPlants (Basel, Switzerland) · 2024Article
- The Adaptive Mechanism of Ginseng Rhizomes in Response to Habitat Changes.Current issues in molecular biology · 2024Article
- Effect of gibberellin on crown root development in the mutant of the rice plasmodesmal Germin-like protein OsGER4.Functional & integrative genomics · 2024Article
- Divergent effects of single and combined stress of drought and salinity on the physiological traits and soil properties ofFrontiers in plant science · 2024Article
- Article
- Responses of roots and rhizosphere of female papaya to the exogenous application of GABMC plant biology · 2023Article
- Genome-wide identification and expression analysis ofPhysiology and molecular biology of plants : an international journal of functional plant biology · 2022Article
- Regulation of Phytohormones on the Growth and Development of Plant Root Hair.Frontiers in plant science · 2022Review
- Review
- Interaction of gibberellin and other hormones in almond anthers: phenotypic and physiological changes and transcriptomic reprogramming.Horticulture research · 2021Article
- Heterologous expression of Arabidopsis thaliana rty gene in strawberry (Fragaria × ananassa Duch.) improves drought tolerance.BMC plant biology · 2021Article
- Coupled Development of Salt Glands, Stomata, and Pavement Cells inFrontiers in plant science · 2021Article
- Review
- SlCAND1, encoding cullin-associated Nedd8-dissociated protein 1, regulates plant height, flowering time, seed germination, and root architecture in tomato.Plant molecular biology · 2020Article
- GA signaling is essential for the embryo-to-seedling transition during Arabidopsis seed germination, a ghost story.Plant signaling & behavior · 2020Article
- Exogenous GAProtoplasma · 2018Article
- Silencing SlMED18, tomato Mediator subunit 18 gene, restricts internode elongation and leaf expansion.Scientific reports · 2018Article
- Expression of Arabidopsis class 1 phytoglobin (AtPgb1) delays death and degradation of the root apical meristem during severe PEG-induced water deficit.Journal of experimental botany · 2017Article
Corrections and comments
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Authors and funding
5 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
key messageWe used auxin-signalling mutants, auxin transport mutants, and auxin-related marker lines to show that exogenously applied GA enhances auxin-induced root inhibition by affecting auxin signalling and transport. Variation in root elongation is valuable when studying the interactions of phytohormones. Auxins influence the biosynthesis and signalling of gibberellins (GAs), but the influence of GAs on auxins in root elongation is poorly understood. This study was conducted to investigate the effect of GA3 on Arabidopsis root elongation in the presence of auxin. Root elongation was inhibited in roots treated with both IAA and GA3, compared to IAA alone, and the effect was dose dependent. Further experiments showed that GA3 could modulate auxin signalling based on root elongation in auxin-signalling mutants and the expression of auxin-responsive reporters. The GA3-enhanced inhibition of root elongation observed in the wild type was not found in the auxin-signalling mutants tir1-1 and axr1-3. GA3 increased DR5::GUS expression in the root meristem and elongation zones, and IAA2::GUS in the columella. The DR5rev::GFP signal was enhanced in columella cells of the root caps and in the elongation zone in GA3-treated seedling roots. A reduction was observed in the stele of PAC-treated roots. We also examined the effect of GA3 on auxin transport. The enhanced responsiveness caused by GA3 was not observed in the auxin influx mutant aux1-7 or the efflux mutant eir1-1. Additional molecular data demonstrated that GA3 could promote auxin transport via AUX1 and PIN proteins. However, GA3-induced PIN gene expression did not fully explain GA-enhanced PIN protein accumulation. These results suggest that GA3 is involved in auxin-mediated primary root elongation by modulating auxin signalling and transport, and thus enhances root responsiveness to exogenous IAA.
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