Bayer and Biotech Get Down to the Roots

Imagine a crop getting nitrogen delivered to its doorstep instead of waiting for another fertilizer pass. Bayer and a biotechnology startup are trying to make that less science fiction and more soil science.

Root awakening: Bayer Crop Science and Switch Bioworks announced a collaboration focused initially on microbes engineered to produce nitrogen on plant roots. Switch’s approach uses a genetic switch intended to let microbes establish themselves before turning on nitrogen production.

The catch: Producing nitrogen costs microbes energy. Strains that make plenty of it can struggle to colonize roots, while excellent root colonizers may deliver too little nitrogen to help crops. The companies want to solve the biological version of being great at the interview but forgetting to show up for work.

Lab results: Switch reported five times more nitrogen from its programmed microbes than from control strains that produced nitrogen continuously in grow-room studies. That is encouraging, but a controlled-room result is not the same as a field-proven replacement for synthetic fertilizer.

Field trip: Switch says USDA and EPA have authorized Midwest field trials. Bayer brings experience with formulation, testing and commercialization, but the companies have not announced financial terms or a launch date. Farmers can keep the wish list handy, not the purchase order.

Why it matters: If engineered microbes eventually provide dependable nitrogen, they could give growers another tool for managing input needs. Until field performance and economics are established, the technology has promising roots, not guaranteed harvest results.