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Updated: Jun 5, 2026

Lateral Root Inducible System in Arabidopsis and Maize
Published on: January 14, 2016
Multimodular auxin response controls lateral root development in Arabidopsis.
1Department of Cell Biology, Max Planck Institute for Developmental Biology, Tübingen, Germany.
Auxin signaling in plants uses multiple response modules, not just one. This multi-layered mechanism explains how a single plant hormone, auxin, can control diverse developmental processes like embryogenesis and lateral root formation.
Area of Science:
- Plant Biology
- Molecular Biology
- Developmental Biology
Background:
- The phytohormone auxin is crucial for plant growth and development.
- Understanding how a single auxin signal leads to diverse developmental outcomes remains a challenge.
Purpose of the Study:
- To investigate the role of the BODENLOS (BDL)/INDOLE-3-ACETIC ACID12 (IAA12)-MONOPTEROS (MP)/AUXIN RESPONSE FACTOR5 (ARF5) auxin response module in plant development.
- To determine the relationship between different auxin response modules in controlling plant development.
Main Methods:
- Genetic analysis of auxin response pathways in plants.
- Investigating the function of specific auxin signaling components during embryogenesis and lateral root development.
Main Results:
- The BDL/IAA12-MP/ARF5 auxin response module is involved in lateral root development.
- This module acts downstream of the SLR/IAA14-ARF7-ARF19 module in lateral root development.
- The study reveals a sequential action of auxin response modules.
Conclusions:
- Bi- or multimodular response mechanisms are likely a general principle in plant auxin signaling.
- These complex signaling pathways provide a genetic framework for auxin's diverse functions in plant development.
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