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Related Experiment Video

Updated: Apr 15, 2026

Lateral Root Inducible System in Arabidopsis and Maize

Lateral Root Inducible System in Arabidopsis and Maize

Published on: January 14, 2016

ZmMed31-ZmSIG2A Coordinates ROS Homeostasis and LRR-RLK Signaling to Regulate Root Development.

Dan Jiang¹, Shengwei Guo¹, Xin Yuan¹

¹State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Maize Research Institute, Sichuan Agricultural University, Chengdu 611130, China.

Plants (Basel, Switzerland)

|April 14, 2026

Summary

Maize (Zea mays L.) nuclear-encoded plastid sigma factor 2A (ZmSIG2A) is crucial for root development and drought adaptation. A ZmMed31-ZmSIG2A-LRR-RLK module regulates these processes, offering insights for stress-resilient crop breeding.

Keywords:

LRR-RLK ZmSIG2A antioxidant enzymes maize (Zea mays L.)reactive oxygen species (ROS) homeostasis root development

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Last Updated: Apr 15, 2026

Lateral Root Inducible System in Arabidopsis and Maize

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Published on: January 14, 2016

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Author Spotlight: Image-Based Methods to Study Membrane Trafficking Events in Stomatal Lineage Cells

Author Spotlight: Image-Based Methods to Study Membrane Trafficking Events in Stomatal Lineage Cells

Published on: May 12, 2023

Area of Science:

Plant Molecular Biology
Plant Physiology
Genetics and Genomics

Background:

ZmSIG2A, a nuclear-encoded plastid sigma factor 2A in maize (Zea mays L.), is vital for chloroplast biogenesis and function.
The precise roles of ZmSIG2A in root development and stress adaptation remain largely unexplored.

Purpose of the Study:

To investigate the function of ZmSIG2A in maize root development and its involvement in stress responses.
To elucidate the regulatory network and molecular mechanisms underlying ZmSIG2A's role in plant growth and adaptation.

Main Methods:

Comparative analysis of two ZmSIG2A mutants (eal1-1 and ems110) to assess root phenotypes and physiological responses.
DAP-seq to identify ZmSIG2A direct targets, Y1H and dual-luciferase assays to investigate upstream regulation by ZmMed31.
Measurement of antioxidant enzyme activities and MDA levels to evaluate oxidative stress responses.

Main Results:

ZmSIG2A mutants exhibited distinct root phenotypes, with eal1-1 showing enhanced root growth and ems110 displaying impaired root development.
ZmSIG2A targets include genes involved in metabolism, transport, signaling, and antioxidants, with a potential module involving LRR-RLKs.
ZmMed31 positively regulates ZmSIG2A transcription, suggesting a link between hormone signaling and the ZmSIG2A regulatory network.

Conclusions:

A stress-responsive ZmMed31-ZmSIG2A-LRR-RLK module is proposed to be essential for maize root development and drought adaptation.
This study provides mechanistic insights into ZmSIG2A function and identifies potential targets for developing stress-resilient maize varieties.