Resveratrol Analog ResA1 Targeting MoYpk1 Exhibits Broad-Spectrum Antifungal Activity against Rice Blast

Area of Science:

• Plant Pathology
• Molecular Biology
• Biochemistry

Background:

• Rice blast, caused by *Magnaporthe oryzae*, poses a significant threat to global rice production.
• Fungicide resistance and environmental concerns necessitate novel antifungal strategies and molecular targets.

Purpose of the Study:

• Identify novel molecular targets for controlling *Magnaporthe oryzae*.
• Discover effective and sustainable antifungal agents against plant pathogenic fungi.

Main Methods:

• Identified MoYpk1, an AGC kinase, as a key regulator of *M. oryzae* pathogenesis.
• Utilized structure-based virtual screening of natural metabolites against MoYpk1.
• Developed and tested a resveratrol derivative (ResA1) for antifungal activity.

Main Results:

• MoYpk1 was validated as a novel fungicide target.
• Resveratrol was identified as an inhibitor, and its derivative ResA1 showed enhanced activity.
• ResA1 specifically targets E381 in MoYpk1, demonstrating broad-spectrum antifungal efficacy and safety for rice and humans.

Conclusions:

• MoYpk1 plays a crucial role in *M. oryzae* virulence and is a promising target for new fungicides.
• ResA1 represents a potential sustainable solution for plant disease management with broad-spectrum activity and favorable safety profile.