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Related Experiment Video

Updated: Aug 22, 2025

Author Spotlight: Soybean Hairy Root Transformation for the Analysis of Gene Function

Author Spotlight: Soybean Hairy Root Transformation for the Analysis of Gene Function

Published on: May 5, 2023

Fluopyram activates systemic resistance in soybean.

Leonardo F Rocha¹, Arjun Subedi¹, Mirian F Pimentel¹

¹School of Agricultural Sciences, Southern Illinois University, Carbondale, IL, United States.

Frontiers in Plant Science

|November 10, 2022

Summary

This summary is machine-generated.

Seed treatments with fluopyram significantly reduced soybean cyst nematode (SCN) populations compared to pydiflumetofen and controls. Fluopyram may activate systemic resistance in soybean plants, aiding SCN suppression.

Keywords:

Glycine max RNA-Seq SDHI fungicides defense priming induced systemic resistance plant-parasitic nematodes seed treatment transcriptomics

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Last Updated: Aug 22, 2025

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Area of Science:

Agricultural Science
Plant Pathology
Nematology

Background:

Soybean cyst nematode (SCN) severely limits soybean yield in the Midwestern US.
Succinate dehydrogenase inhibitors (SDHI) fungicides as seed treatments are used to manage SCN.
Understanding SDHI mechanisms against SCN is crucial for effective crop protection.

Purpose of the Study:

To evaluate the efficacy of fluopyram and pydiflumetofen seed treatments against SCN.
To investigate the transcriptomic responses of soybean seedlings to these SDHI compounds.
To elucidate the mechanisms by which fluopyram suppresses SCN.

Main Methods:

Field studies to assess SCN population densities and plant responses.
Next-generation sequencing to analyze gene expression profiles in treated soybean seedlings.
Bioinformatic analysis of differentially expressed genes (DEGs) at 5 and 10 days after planting (DAP).

Main Results:

Fluopyram seed treatment markedly reduced SCN cyst and egg counts compared to pydiflumetofen and untreated controls.
Transcriptomic analysis revealed significant gene expression shifts in response to fluopyram and pydiflumetofen.
Fluopyram treatment induced DEGs associated with systemic resistance pathways in soybean.

Conclusions:

Fluopyram demonstrates superior efficacy in suppressing SCN populations compared to pydiflumetofen.
Systemic resistance activation, alongside nematicidal activity, likely contributes to fluopyram's effectiveness against SCN.
Non-target inhibition of soybean succinate dehydrogenase by fluopyram may trigger phytotoxicity and systemic resistance.