Trichoderma-Mediated Iron Oxide Nanoparticles for Non-GM Drought Resistance

The patent uses Trichoderma harzianum fungus as an intermediary organism to mediate between the desired drought resistance effect and consumer acceptance concerns. The fungus naturally produces iron oxide nanoparticles that are taken up by plants, providing drought resistance without direct genetic modification of the crop plants themselves. This intermediary approach allows the beneficial effects while avoiding the labeling and consumer aversion associated with genetically engineered crops.

The patent replaces the mechanical/genetic engineering system with a biochemical system. Instead of using genetic engineering tools to directly modify plant DNA, the invention uses fungal metabolites (iron oxide nanoparticles) to achieve the same physiological effect of drought resistance through natural biochemical pathways in the plant, thereby avoiding genetic modification while achieving similar results.

The patent changes the physical parameter of the iron compound from bulk material to nanoparticle scale (1-100 nm). This size reduction dramatically increases the surface area to volume ratio, enhancing bioavailability and uptake efficiency by plants. The nanoparticles can be more effectively absorbed through roots and leaves, promoting plant growth at lower application rates and reducing chemical residue in the environment compared to conventional fertilizers.

The patent creates a composite system combining biological components (Trichoderma harzianum fungus) with inorganic nanoparticles (iron oxide). This bio-nano composite approach leverages the natural metabolite production capability of the fungus to generate biocompatible iron oxide nanoparticles that are both effective for plant growth promotion and environmentally friendly, avoiding the pollution issues associated with synthetic chemical fertilizers.