Balancing growth and immunity of potato by humidity-dependent expression of a late blight resistance gene.

Humidity-activated cis-regulatory elements enable potato plants to resist late blight without growth penalties, demonstrating a novel environmental-responsive gene regulation strategy.

• Why it matters: Balancing disease resistance with crop growth remains a challenge, as traditional resistance strategies often impair yield. Understanding environmental cues like humidity can improve resistance deployment.
• What they did: Researchers identified humidity-activated cis-regulatory elements in tomato and potato, then engineered transgenic potato lines with a resistance gene driven by an artificial humidity-inducible promoter containing these elements.
• The result: The transgenic potatoes showed resistance comparable to overexpression lines but maintained normal growth and tuber yield, illustrating a promising approach to develop resilient crops that respond to environmental conditions.