ArticleJournal of experimental botany2015
Silencing C19-GA 2-oxidases induces parthenocarpic development and inhibits lateral branching in tomato plants.
Article in Journal of experimental botany, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 54 papers.
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54 citing papers in PubMed, 96 citations in OpenAlex.
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- Comprehensive Analysis of Boron-Induced Changes in Cell Expansion and Phytohormone During Early Ovary Development in Pear (Plants (Basel, Switzerland) · 2025Article
- Gibberellin-induced parthenocarpy in fruits of a prickly pear mutant.Plant cell reports · 2025Article
- Identification and functional analysis of the CqGID1 homologs in quinoa.Plant cell reports · 2025Article
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- Comparison of endogenous hormone content and balance inFrontiers in plant science · 2025Article
- The mutation of ent-kaurenoic acid oxidase, a key enzyme involved in gibberellin biosynthesis, confers a dwarf phenotype to cucumber.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2024Review
- The role of gibberellin synthase gene VvGA2ox7 acts as a positive regulator to salt stress in Arabidopsis thaliana.BMC plant biology · 2024Article
- Gibberellins Play an Essential Role in the Bud Growth ofCurrent issues in molecular biology · 2024Article
- Gibberellin 2-Oxidases in Potato (Solanum tuberosum L.): Cloning, Characterization, In Silico Analysis and Molecular Docking.Molecular biotechnology · 2024Article
- The tomato EAR-motif repressor, SlERF36, accelerates growth transitions and reduces plant life cycle by regulating GA levels and responses.Plant biotechnology journal · 2024Article
- Flowering and Runnering of Seasonal Strawberry under Different Photoperiods Are Affected by Intensity of Supplemental or Night-Interrupting Blue Light.Plants (Basel, Switzerland) · 2024Article
- The hormone regulatory mechanism underlying parthenocarpic fruit formation in tomato.Frontiers in plant science · 2024Review
- Parthenocarpy inPlants (Basel, Switzerland) · 2023Review
- Gibberellin biosynthesis is required for CPPU-induced parthenocarpy in melon.Horticulture research · 2023Article
- Transcriptome-Based Construction of the Gibberellin Metabolism and Signaling Pathways inInternational journal of molecular sciences · 2023Article
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Authors and funding
3 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Gibberellins (GAs) are phytohormones that regulate a wide range of developmental processes in plants. Levels of active GAs are regulated by biosynthetic and catabolic enzymes like the GA 2-oxidases (GA2oxs). In tomato (Solanum lycopersicum L.) C19 GA2oxs are encoded by a small multigenic family of five members with some degree of redundancy. In order to investigate their roles in tomato, the silencing of all five genes in transgenic plants was induced. A significant increase in active GA4 content was found in the ovaries of transgenic plants. In addition, the transgenic unfertilized ovaries were much bigger than wild-type ovaries (about 30 times) and a certain proportion (5-37%) were able to develop parthenocarpically. Among the GA2ox family, genes GA2ox1 and -2 seem to be the most relevant for this phenotype since their expression was induced in unfertilized ovaries and repressed in developing fruits, inversely correlating with ovary growth. Interestingly, transgenic lines exhibited a significant inhibition of branching and a higher content of active GA4 in axillary buds. This phenotype was reverted, in transgenic plants, by the application of paclobutrazol, a GA biosynthesis inhibitor, suggesting a role for GAs as repressors of branching. In summary, this work demonstrates that GA 2-oxidases regulate gibberellin levels in ovaries and axillary buds of tomato plants and their silencing is responsible for parthenocarpic fruit growth and branching inhibition.
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