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Comprehensive characterisation of IAA inactivation pathways reveals the impact of glycosylation on auxin metabolism and plant development in Arabidopsis.

Communications biology - 4 Jun 2026

Casanova-Sáez Rubén, Pěnčík Aleš, Brunoni Federica, Ament Anita, Hladík Pavel, Žukauskaitė Asta, Šimura Jan, Voß Ute, Novák Ondřej, Bennett Malcolm, Ljung Karin, Mateo-Bonmatí Eduardo

Abstract excerpt

Alongside biosynthesis and transport, inactivation regulates indole-3-acetic acid (IAA) concentration, a compound with numerous functions in plant development. The main inactive IAA metabolites are oxidised forms and ester- or amide-linked conjugates. DIOXYGENASE FOR AUXIN OXIDATION1 (DAO1) and DAO2, 2-oxoglutarate and iron-dependent dioxygenases, contribute to IAA oxidative inactivation with group II GRETCHEN...

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Identifiers

PMID: 42243496
DOI: 10.1038/s42003-026-10431-5
PMCID: PMC13237164

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