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Related Experiment Video

Updated: May 10, 2026

Using Ustilago maydis as a Trojan Horse for In Situ Delivery of Maize Proteins

Using Ustilago maydis as a Trojan Horse for In Situ Delivery of Maize Proteins

Published on: February 8, 2019

Ustilago maydis reprograms cell proliferation in maize anthers.

Li Gao¹, Timothy Kelliher, Linda Nguyen

¹State Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China. lgao@ippcaas.cn

The Plant Journal : for Cell and Molecular Biology

|June 26, 2013

Summary

This summary is machine-generated.

Ustilago maydis causes maize tumors by altering anther development and gene expression. This smut fungus manipulates host cells, deploying specific genes to infect corn anthers and impact plant growth.

Keywords:

Ustilago maydis Zea mays anther interaction

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A Rapid and Efficient Method for Assessing Pathogenicity of Ustilago maydis on Maize and Teosinte Lines

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A Rapid and Efficient Method for Assessing Pathogenicity of Ustilago maydis on Maize and Teosinte Lines

A Rapid and Efficient Method for Assessing Pathogenicity of Ustilago maydis on Maize and Teosinte Lines

Published on: January 3, 2014

Area of Science:

Plant Pathology
Mycology
Genomics

Background:

Ustilago maydis is a significant pathogen of maize (Zea mays), a vital global crop.
This fungus induces tumor formation in aerial plant parts, facilitating its sporulation.

Purpose of the Study:

To investigate the spatiotemporal dynamics of Ustilago maydis infection in corn anthers.
To understand how fungal infection impacts maize anther development and gene expression.
To identify fungal genes involved in maize anther pathogenesis.

Main Methods:

Confocal microscopy was used to track Ustilago maydis within corn anthers over 7 days post-injection.
Transcriptome profiling via dual-organism microarray analyzed gene expression changes in both host and pathogen.
Quantification of fungal effects on tassel and overall plant growth was performed.

Main Results:

Ustilago maydis initially colonizes the anther epidermis, reaching all cell types by 3 days post-injection.
Fungal infection significantly alters host cell fate, division, expansion, and senescence.
Thousands of anther genes (17%) were affected, with 2018 fungal genes expressed in anthers, including 206 potential secretome genes.

Conclusions:

Ustilago maydis utilizes specific genes to cause disease in distinct maize organs.
The fungus manipulates host plant mechanisms to promote tumor development.
Understanding these interactions provides insights into plant-pathogen molecular communication.