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Related Experiment Video

Updated: Jul 6, 2025

Investigating Interactions Between Histone Modifying Enzymes and Transcription Factors in vivo by Fluorescence Resonance Energy Transfer

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Auxin-responsive ROS homeostasis genes display dynamic expression pattern during rice crown root primordia

Akshay Kumar¹, Komal Verma¹, Rohan Kashyap¹

¹Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Uttarakhand, India.

Plant Physiology and Biochemistry : PPB

|December 30, 2023

Summary

This study reveals how auxin and reactive oxygen species (ROS) interact to control rice root development. Understanding this auxin-ROS crosstalk helps in improving root architecture and crop resilience.

Keywords:

Adventitious/crown root primordia Auxin In situ hybridization Laser capture microdissection-RNA sequencing ROS signaling Redox

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Area of Science:

Plant Biology
Molecular Biology
Genetics

Background:

Reactive oxygen species (ROS) are vital signaling molecules in plants, regulating growth and stress responses.
Auxin signaling is critical for root architecture, but its interaction with ROS requires molecular elucidation.
Rice crown roots develop from shoot-derived adventitious roots, forming the primary fibrous system.

Purpose of the Study:

To investigate the molecular mechanisms of auxin-ROS crosstalk in rice root initiation and growth.
To identify genes involved in maintaining ROS homeostasis during root development.
To understand how auxin signaling influences redox-related gene expression in rice crown roots.

Main Methods:

Potassium iodide treatment to alter ROS levels and observe root architecture changes.
Auxin induction to assess recovery of root growth defects.
Transcriptome analysis (RNA sequencing) to identify differentially expressed genes.
RNA in situ hybridization for spatio-temporal gene expression analysis.

Main Results:

Altered ROS levels due to potassium iodide treatment impacted rice root architecture.
Auxin treatment restored root growth and development by normalizing hydrogen peroxide levels.
Identified redox-related antioxidant genes (peroxidase, glutathione reductase, etc.) regulated by auxin signaling.
Confirmed spatio-temporal expression patterns of key genes during crown root primordia development.

Conclusions:

Uncovered a crucial auxin-ROS crosstalk mechanism essential for rice root organogenesis.
Identified specific antioxidant gene families involved in auxin-mediated root development.
Provides molecular insights into maintaining ROS homeostasis for optimal plant growth and development.