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Related Experiment Video

Updated: Sep 19, 2025

Lateral Root Inducible System in Arabidopsis and Maize

Lateral Root Inducible System in Arabidopsis and Maize

Published on: January 14, 2016

Endodermal lignification coordinates with root calcium levels to govern lateral root emergence.

Yuqiu Lai¹, Zhihang Feng¹, Xianyong Lin¹

¹MOE Key Laboratory of Environment Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China.

The New Phytologist

|June 9, 2025

Summary

This summary is machine-generated.

Calcium (Ca) regulates lateral root emergence by controlling endodermal cell lignification. Casparian strip integrity is crucial for this Ca-dependent process, impacting plant development.

Keywords:

Arabidopsis thaliana Casparian strip SGN3 calcium nutrient lateral root emergence lignification

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Area of Science:

Plant Biology
Root Development
Nutrient Transport

Background:

Calcium (Ca) is vital for plant growth, particularly lateral root (LR) formation.
The Casparian strip (CS) in the root endodermis acts as a barrier, regulating nutrient uptake.
CS integrity influences nutrient transport and plant adaptation.

Purpose of the Study:

To investigate the role of Casparian strip integrity in local Calcium-dependent lateral root emergence.
To understand how CS integrity modulates endodermal cell lignification and LR development in Arabidopsis.

Main Methods:

Arabidopsis thaliana genetic mutants with disrupted CS integrity.
Piperonylic acid treatment to induce lignification.
Analysis of auxin gradients and LR primordia morphology.
Genetic analysis involving the SGN3/GSO1 receptor-like kinase.

Main Results:

CS integrity regulates Ca-dependent LR emergence by controlling endodermal cell lignification.
Sufficient Ca is required to maintain auxin gradients and LR primordia morphology in mutants with disrupted CS.
Excessive lignification delays LR emergence under low-Ca conditions, mediated by SGN3/GSO1.
CS function in LR emergence is independent of Ca translocation to shoots.

Conclusions:

Casparian strip integrity directly modulates Ca-dependent lateral root emergence.
Lignification of overlying endodermal cells, controlled by CS integrity, influences cell wall stiffness and LR development.
This mechanism highlights a direct link between root barrier function and nutrient-mediated organogenesis.