PIF4 Protein Overexpression Increases Tomato Spotted Wilt Virus Resistance in Nicotiana benthamiana Across Temperatures

Researchers have identified that the protein PIF4 increases resistance to the Tomato spotted wilt virus (TSWV) in *Nicotiana benthamiana* plants, regardless of ambient temperature conditions. The study, published in *Scientific Reports* on June 2, 2026, demonstrates that the overexpression of the PIF4 gene significantly reduces viral accumulation and mitigates disease symptoms in the plant species.

The research team observed that PIF4 functions as a key regulator in the plant’s defense mechanism against TSWV. While many plant immune responses fluctuate based on environmental heat, the data indicates that PIF4-mediated tolerance remains stable across varying temperature ranges. By analyzing the molecular interactions within the plants, the study confirms that higher levels of PIF4 expression correlate with a stronger suppression of the virus. These findings provide new insight into the genetic pathways that govern plant immunity and suggest that PIF4 plays a specific role in maintaining viral resistance under diverse climate conditions.

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Date: June 2, 2026

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GOAI