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Updated: Jun 14, 2026

Scalable, Flexible, and Cost-Effective Seedling Grafting
Published on: January 6, 2023
Strigolactones, a novel class of plant hormone controlling shoot branching
1Institut National de la Recherche Agronomique, institut Jean-Pierre Bourgin, UMR 1318 INRA-AgroParisTech, INRA Centre de Versailles-Grignon, Versailles cedex, France. Catherine.Rameau@versailles.inra.fr
Abstract:
For several decades, auxin and cytokinin were the only two hormones known to be involved in the control of shoot branching through apical dominance, a process where the shoot apex producing auxin inhibits the outgrowth of axillary buds located below. Grafting studies with high branching mutants and cloning of the mutated genes demonstrated the existence of a novel long distance carotenoid derived signal which acted as a branching inhibitor. Recently, this branching inhibitor has been shown to belong to the strigolactones, a group of small molecules already known to be produced by roots, exuded in the rhizosphere and as having a role in both parasitic and symbiotic interactions.
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