Protist-facilitated transport platform for seed-applied agrochemical delivery

Overview

This patented platform technology leverages naturally occurring soil protists—single-cell eukaryotic microorganisms—to actively transport agrochemical agents through soil and concentrate them at the tips of growing roots. Many promising agrochemicals suffer from poor soil mobility, high specific cost, and the need for excessive application rates, which limits viable delivery methods and creates health, safety, and environmental concerns. By harnessing protists as living delivery vehicles, the technology enables targeted rhizosphere delivery, potentially reducing application rates while expanding the range of agrochemicals that can be applied via seed treatment or other low-volume methods.

Technical specifications

Core mechanism:

• Protists, abundant but often overlooked members of the soil microbiome, uptake agrochemical particles and transport them through the soil matrix
• Active biological transport supplements passive diffusion, pushing payloads further into the rhizosphere than chemical mobility alone would allow
• Payload concentration at root tips enhances local efficacy where it matters most

Validation evidence to date:

• Fluorescent polystyrene bead tracers were transported further through synthetic soil micromodels in the presence of protists compared to controls without protists
• In soil-containing microcosms, nitrogen-fixing symbiotic bacteria were detected on average 52 mm further into the rhizosphere with the technology than without it within two weeks of inoculation
• A patent has been awarded covering the transport and targeting method

Planned next steps:

• Screening of candidate agrochemicals (poor soil mobility, low effective dose, high specific cost) across multiple protist species to identify optimal combinations
• Limited soil column testing with HPLC characterization to quantify agrochemical distribution
• Full greenhouse trials against known pests to measure performance enhancement

Technology readiness level

The platform has been demonstrated at the laboratory scale with model particles (beads) and living microbes (nitrogen-fixing bacteria), and intellectual property protection has been secured through an issued patent. The next logical step—validation with actual agrochemical particles—has been defined but not yet executed. The technology is positioned for collaborative development with agrochemical companies and seed-treatment formulators interested in expanding the applicability of high-value but mobility-limited crop protection products.