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Updated: Apr 22, 2026

Lateral Root Inducible System in Arabidopsis and Maize

Lateral Root Inducible System in Arabidopsis and Maize

Published on: January 14, 2016

Hypocotyl adventitious root organogenesis differs from lateral root development.

Inge Verstraeten¹, Sébastien Schotte¹, Danny Geelen¹

¹Department of Plant Production, Faculty of Bioscience Engineering, Ghent University Ghent, Belgium.

Frontiers in Plant Science

|October 18, 2014

Summary

Adventitious root (AR) formation in Arabidopsis hypocotyls, unlike lateral roots, is controlled by specific environmental and genetic factors. Auxin is key, while other hormones inhibit AR, revealing a unique regulatory network.

Keywords:

Arabidopsis thaliana adventitious root differential regulation lateral root plant growth regulators

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A Simple Chamber for Long-term Confocal Imaging of Root and Hypocotyl Development

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Area of Science:

Plant Biology
Developmental Biology
Genetics

Background:

Adventitious root (AR) formation is crucial for plant survival and propagation, occurring with or without wounding.
ARs can initiate in etiolated Arabidopsis thaliana hypocotyls upon de-etiolation, distinct from root-based lateral root (LR) formation.
Hypocotyl AR development shares similarities with LRs but occurs in a determinate structure, suggesting unique regulatory mechanisms.

Purpose of the Study:

To provide an overview of environmental and genetic factors controlling hypocotyl-born AR in Arabidopsis thaliana.
To summarize how AR formation and its regulatory factors differ from lateral root induction.

Main Methods:

Review of existing literature on adventitious rooting and lateral root development.
Analysis of genetic factors and signaling networks involved in hypocotyl AR formation.
Comparison of regulatory mechanisms between hypocotyl AR and primary root LR development.

Main Results:

Hypocotyl AR formation is influenced by genotype and environmental conditions, differing from LR induction.
Auxin is a primary regulator of hypocotyl AR, while cytokinins, ethylene, jasmonic acid, and strigolactones generally inhibit it.
Specific genetic factors and a dedicated signaling network drive AR formation in the Arabidopsis hypocotyl.

Conclusions:

Hypocotyl AR formation represents a distinct organogenesis process with unique environmental and genetic controls compared to LR development.
The identified genetic factors and signaling pathways offer new insights into the fine-tuning of AR initiation and emergence.
Understanding these distinct mechanisms is vital for plant regeneration and propagation strategies.