Metabolic and transcriptional responses reveal co-option of symbiotic processes during early soybean-soybean cyst nematode interaction

In compatible soybean–Heterodera glycines interactions, a 72-metabolite defense signature persists across invasion to syncytium maturation despite near-silent defense transcription by 3 days post-infection.

• Why it matters: Understanding how virulent SCN populations overcome soybean resistance requires resolving how host immunity is remodeled during early infection and establishment.
• What they did: The study profiled soybean roots metabolically and transcriptomically across a time series from nematode invasion through syncytium maturation, focusing on a compatible interaction with Rhg1 high-copy soybean challenged by HG Type 2.5.7 SCN.
• The result: Defense transcription is suppressed by 3 days post-infection while defense metabolites remain, and by 5 days post-infection cytokinin accumulation aligns with nodulin induction and phospholipid remodeling consistent with co-option of the legume symbiosis program.

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