EPISODE 36: Partners in Crime – When Nematodes Team Up with Plant Pathogens

In this episode of the WOrM Podcast, we explore how plant-parasitic nematodes rarely act alone.

Focusing on nematode–pathogen disease complexes, this episode examines how interactions between nematodes, microbes, and host plants lead to more severe disease outcomes than any single pathogen could cause on its own. Drawing on examples spanning bacteria, fungi, oomycetes, and viruses, we look at why these partnerships are so effective — and so difficult to control.

We discuss how nematodes contribute to disease through:

• Mechanical wounding that creates entry points for secondary pathogens

• Formation of nutrient-rich feeding sites that support microbial proliferation

• Vectoring of plant viruses via the stylet and oesophageal tissues

• Active suppression of plant immune responses through secreted effectors

The episode highlights classic and emerging disease complexes, including root-knot nematode interactions with Fusarium and Ralstonia, as well as virus transmission by dagger and stubby-root nematodes. We also reflect on how nematode lifestyle — migratory versus sedentary — shapes the structure and severity of these interactions.

Rather than focusing on control strategies alone, this episode centres on mechanism: how multi-organism interactions arise, why they persist, and what they reveal about host susceptibility and immune regulation.

📖 Based on the research article:

“Partners in Crime: Elucidating the Molecular Underpinnings of Nematode–Pathogen Disease Complexes”

Alison Blundell, Bardo Castro, Veronica I. Casey, Valerie M. Williamson & Shahid Siddique

Molecular Plant–Microbe Interactions (2026)

🔗 https://doi.org/10.1094/MPMI-10-25-0154-FI

This podcast is generated with artificial intelligence and curated by Veeren. If you’d like your publication featured on the show, please get in touch.

📩 More info:

🔗 www.veerenchauhan.com

📧 veeren.chauhan@nottingham.ac.uk