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Updated: Aug 14, 2025

Identification of Alternative Splicing and Polyadenylation in RNA-seq Data
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Disarm resistance: Fungal effectors target WAK alternative splicing variant for virulence

Zunyong Liu1, Yunqing Jian1, Libo Shan1

  • 1Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX 77843, USA.

Cell Reports
|January 14, 2023
PubMed

Insights

Fusarium graminearum CFEM effectors suppress maize immunity by targeting ZmWAK17. This study reveals how these fungal effectors facilitate plant disease susceptibility.

Area of Science:

  • Plant Pathology
  • Molecular Plant-Microbe Interactions
  • Crop Science

Background:

  • Plant immunity relies on molecular interactions between plant receptors and pathogen effectors.
  • Fusarium graminearum causes significant crop losses in maize (Zea mays).
  • Understanding pathogen effector function is crucial for developing disease resistance strategies.

Purpose of the Study:

  • To mechanistically characterize the role of Fusarium graminearum CFEM effectors in modulating maize immunity.
  • To investigate the interaction between CFEM effectors and the ZmWAK17 receptor-like kinase.
  • To elucidate how these effectors contribute to disease susceptibility in maize.

Main Methods:

  • Yeast-two-hybrid assays to detect protein-protein interactions.
  • Transient expression assays in maize protoplasts to assess effector function.
  • Analysis of plant defense responses upon effector treatment.

Main Results:

  • Identified specific CFEM effectors from Fusarium graminearum that interact with ZmWAK17.
  • Demonstrated that these CFEM effectors suppress ZmWAK17-mediated plant defense signaling.
  • Showed that effector activity leads to increased susceptibility of maize to fungal infection.

Conclusions:

  • Fusarium graminearum CFEM effectors are virulence factors that actively suppress plant immunity.
  • Targeting ZmWAK17 is a key strategy employed by these effectors to overcome maize defenses.
  • These findings provide insights into the molecular basis of Fusarium head blight and inform resistance breeding efforts.

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