Cyanobacterin resistance gene for engineering herbicide-tolerant crops
A cyanobacterin–orf10 pair that enables engineering of cyanobacterin-resistant crops analogous to Roundup Ready® systems. Cyanobacterin is a natural herbicide active against plants, algae, and cyanobacteria at concentrations 100–1,000× lower than those toxic to mammalian cells, offering a potentially safer alternative herbicide platform.
Overview
This solution pairs the natural herbicide cyanobacterin with its cognate resistance gene, orf10, to enable engineering of cyanobacterin-tolerant crops. The concept mirrors established herbicide-tolerant cropping systems such as Roundup Ready® plants, but is built on a natural product that exhibits herbicidal activity at very low concentrations and has a favorable selectivity profile relative to mammalian cells. By introducing a codon-optimized version of orf10 under plant-specific promoters, target crops such as Arabidopsis, corn, and soybean could be made resistant to cyanobacterin while non-transgenic weeds and susceptible plants remain controlled.
Technical specifications
- Natural herbicide: Cyanobacterin is a potent herbicidal natural product with activity against plants, algae, and cyanobacteria at concentrations 100–1,000× lower than those toxic to mammalian cells.
- Resistance gene: orf10 was identified in the cyanobacterin-producing organism and confers resistance when expressed in a cyanobacterin-sensitive cyanobacterial strain.
- Self-resistance validation: The native producing organism is resistant to cyanobacterin despite harboring the conserved pathway that the compound inhibits, supporting the biological basis for resistance.
- Transgenic design plan: A codon-optimized orf10 gene fused to plant variant-specific promoters will be constructed to ensure proper transcription and translation in dicot and monocot hosts.
- Transformation approach: Genes and promoters will be introduced into Arabidopsis, corn, and soybean using Agrobacterium-mediated leaf infiltration.
- Resistance assay: Transgenic plants will be exposed to cyanobacterin purified from the producing cyanobacteria and dissolved in dimethylsulfoxide to quantify resistance levels.
- Target crops: Arabidopsis (dicot model), soybean (dicot), and corn (monocot), demonstrating applicability across both major crop classes.
Technology readiness level
The resistance gene has been functionally validated in a cyanobacterin-sensitive cyanobacterial strain, and self-resistance has been confirmed in the native producing organism. The next stage of validation will test codon-optimized, plant-promoter-driven orf10 constructs in Arabidopsis, corn, and soybean using Agrobacterium-mediated transformation, followed by cyanobacterin exposure assays to measure resistance. This positions the technology at an early stage of development, with proof-of-concept demonstrated in cyanobacteria and plant-level validation as the immediate next step.
About Oregon State University
Oregon State University is a comprehensive public research university and Oregon’s land‑grant institution, with a main campus in Corvallis and a statewide footprint. Industry partners tap a statewide Extension network and county offices to pilot and scale solutions with communities and companies across Oregon. A coastal marine science campus in Newport anchors ocean research and provides access to open‑ocean wave‑energy test ranges and grid‑connected infrastructure under development nearby, enabling sea‑to‑shore prototyping. Field stations and university‑managed research forests support long‑term trials and product validation in real‑world environments. A dedicated technology transfer office and the OSU Advantage programs—including the Advantage Accelerator—streamline IP, licensing, startup formation, and industry agreements.
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