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Sammanfattning

Apical hook development is an ideal model for studying differential growth in plants and is controlled by complex phytohormonal crosstalk, with auxin being the major player. Here, we identified a bioactive small molecule that decelerates apical hook opening in Arabidopsis thaliana. Our genetic studies suggest that this molecule enhances or maintains the auxin maximum found in the inner hook side and requires certain auxin signaling components to direct target of this compound. We present data in support of RACK1A playing a positive role in apical hook opening by activating specific auxin signaling mechanisms and negatively regulating the differential auxin response gradient across the hook, thereby adjusting differential cell growth, an essential process for organ structure and function in plants.

Nyckelord

apical hook; auxin; Arabidopsis; differential cell growth

Publicerad i

Proceedings of the National Academy of Sciences of the United States of America
2025, volym: 122, nummer: 30, artikelnummer: e2407224122
Utgivare: NATL ACAD SCIENCES

SLU författare

UKÄ forskningsämne

Botanik

Publikationens identifierare

  • DOI: https://doi.org/10.1073/pnas.2407224122

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/143283