A two-step auxin-GA cross-talk regulates organ formation in tomato.

Alon Israeli, Dov Nir, Ido Shwartz, Matan Levy, Marc W Schmid, Yogev Burko, Idan Efroni, Naomi Ori

Abstract read

In one paragraph

Article in Development (Cambridge, England), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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0citing papers in PubMed

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1 · What the graph read from it

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2 · The registry

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4 · The record

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5 · Who and what money

Authors and funding

8 authors.

Alon IsraeliThe Institute of Plant Sciences and Genetics in Agriculture, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 7610001, Israel.ORCID 0000-0002-3339-2042

Dov NirThe Institute of Plant Sciences and Genetics in Agriculture, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 7610001, Israel.

Ido ShwartzThe Institute of Plant Sciences and Genetics in Agriculture, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 7610001, Israel.

Matan LevyThe Institute of Plant Sciences and Genetics in Agriculture, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 7610001, Israel.ORCID 0000-0002-3198-6218

Marc W SchmidMWSchmid GmbH, Hauptstrasse 34, 8750 Glarus, Switzerland.

Yogev BurkoThe Institute of Plant Sciences, Agricultural Research Organization, Volcani Center, Rishon LeZion 7505101, Israel.ORCID 0000-0002-3607-6280

Idan EfroniThe Institute of Plant Sciences and Genetics in Agriculture, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 7610001, Israel.ORCID 0000-0002-0219-8685

Naomi OriThe Institute of Plant Sciences and Genetics in Agriculture, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 7610001, Israel.ORCID 0000-0002-5129-5369

Funding

Azrieli FoundationBranco Weiss Fellowship - Society in ScienceBranco Weiss Fellowship Society in ScienceHebrew University of JerusalemIsrael Science Foundation 248-19Israel Science Foundation 511-25

6 · The paper itself

Abstract

Plant organ formation involves an initiation stage followed by growth, together determining organ shape. The plant hormone auxin regulates both initiation and growth. However, it is still not clear how auxin facilitates these two separate successive stages. Here, we show that in tomato compound-leaf development, auxin promotes leaflet initiation and growth via opposite effects on gibberellin (GA) metabolism. Short auxin treatment induced the expression of GA catabolism genes, while a longer increased auxin response induced the expression of GA biosynthesis genes. GA biosynthesis mutants suppressed auxin-induced blade growth. Leaflet number was reduced by increased GA activity, and local reduction of GA activity led to the formation of ectopic leaflets, indicating that leaflet initiation requires reduced GA. Expression of a GA catabolism gene in initiating leaflets was sufficient to induce ectopic leaflets in the adjacent intercalary region, suggesting a non-autonomous function of GA. Collectively, these results point to a context-dependent dual interaction between auxin and GA in organ formation: auxin reduces GA to enable initiation, and induces GA to promote growth.

Indexed as

GibberellinsIndoleacetic AcidsSolanum lycopersicumGene Expression Regulation, PlantPlant Growth RegulatorsPlant LeavesSignal TransductionGibberellinsIndoleacetic AcidsPlant Growth RegulatorsAuxinCompound leavesGibberellinHormone cross-talkOrgan developmentTomato

Identifiers

PMID42343828

DOI10.1242/dev.205772

PMCPMC13489554

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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.