Deconstructed viral vector complementation system for agile crop protection

Overview

This technology platform enables agile crop protection by using highly deconstructed viral vectors complemented with stress-inducible viral functions in transgenic plants. The approach allows protective genes to be introduced into crops after they are already in the field, providing a responsive defense strategy against emerging threats such as insect pests and fungal pathogens. By combining improved gene expression control through plant promoters with advances in understanding plant virus gene function, this episomal crop protection strategy offers a flexible alternative to traditional transgenic approaches.

Technical specifications

• Deconstructed viral vectors designed for complementation with stress-inducible viral functions
• Transgenic complementation plants containing complementary viral gene functions under controlled plant promoters
• Multi-scale proliferation model providing a framework for guiding experimental predictions on viral vector behavior
• Quantitative tracking system using viral-transactivated luciferase in transgenic plants to monitor systemic virus movement kinetics
• Reporter gene validation completed demonstrating proof-of-principle for the gene delivery approach
• Critical path viral complementation construct with design and genetic elements ready for assembly
• Chitinase-based protective gene candidate with demonstrated insecticidal and anti-fungal activity in transgenic systems

Technology readiness level

The technology has progressed through initial proof-of-principle validation using reporter genes in model systems. Extensive transformation vectors, transgenic plants, and deconstructed viral vectors have been developed. Current efforts focus on expanding from the original crop plant to Nicotiana benthamiana for accelerated proof-of-concept demonstration, with transformations currently ongoing. Plant regeneration and rooting assessments are underway to evaluate systemic virus movement. The construct design and genetic elements for the critical path complementation system are in hand, with assembly as the next milestone. Stress testing for crop protection efficacy is anticipated to require collaborative resources beyond a seed grant scope.