Sustainable and Biosafe Approach to Control Potato Late Blight Using Mesoporous Silica Nanoparticles

Area of Science:

• Agricultural Science
• Materials Science
• Plant Pathology

Background:

• Potato late blight, caused by Phytophthora infestans, is a major threat to potato crops.
• Existing fungicides face challenges with resistance and environmental impact.

Purpose of the Study:

• To synthesize and evaluate mesoporous silica nanoparticles (MSNs) as a novel fungicide against Phytophthora infestans.
• To elucidate the mechanism of MSNs in inhibiting P. infestans growth and reproduction.

Main Methods:

• Synthesis of MSNs with high specific surface area (786.28 m²/g).
• In vitro inhibition assays against P. infestans germination, sporangia infection, and zoospore release.
• Analysis of reactive oxygen species (ROS) production and structural damage.
• Pot experiments on potato plants to assess translocation, plant physiological responses, and soil interactions.

Main Results:

• MSNs demonstrated significant inhibition of P. infestans, outperforming some commercial fungicides.
• MSNs disrupted key reproductive processes including germination and zoospore release.
• MSNs induced ROS production and structural damage in P. infestans sporangia.
• MSNs were translocated within potato plants, enhanced physiological processes, alleviated drought stress, and were soil microbe-friendly.

Conclusions:

• MSNs offer a green and sustainable alternative for managing potato late blight.
• The study confirms the safety and feasibility of MSNs as an eco-friendly fungicide.
• MSNs provide a novel mechanism to control P. infestans by targeting its reproductive cycle and inducing stress responses.