Wheat plants engineered to pull nitrogen from air like legumes

Scientists have created wheat plants that can extract nitrogen directly from the atmosphere—a trait that's normally reserved for beans and clover. In lab conditions with low soil nitrogen, these engineered plants grew larger and produced higher grain yields than conventional wheat, suggesting a path toward crops that need far less fertilizer.

The breakthrough hinges on a single plant compound called apigenin. Researchers at the University of California used CRISPR gene editing to boost apigenin production in wheat, then watched what happened when the excess leaked into the soil around the roots.

Turns out, soil bacteria called diazotrophs "read" that chemical signal like a dinner invitation. The apigenin triggered them to form protective biofilm coatings—specialized structures that create the low-oxygen environment their nitrogen-fixing enzyme needs to work. That enzyme, nitrogenase, converts atmospheric nitrogen into a form the plant can actually use.

This isn't entirely new territory. The same team had already demonstrated the concept in rice, but wheat is a different challenge. Wheat feeds roughly 2 billion people globally, and it's grown on more land than any other crop. Most wheat farming relies heavily on synthetic nitrogen fertilizers—which account for about 2% of global energy use and contribute significantly to agricultural emissions.

To find apigenin, the researchers screened thousands of compounds in wheat. They had to be selective: the goal was to trigger beneficial bacteria without disrupting the plant's own biology. Once they identified their candidate and engineered plants to produce more of it, the results were consistent. The modified wheat showed higher nitrogen content, better photosynthesis, and increased grain yields in nitrogen-poor soil.

Previous attempts to boost wheat yields under low-nitrogen conditions have largely failed, which is why this feels different to the researchers involved. They're careful not to oversell—this is still early-stage work, conducted in controlled environments. But the mechanism is straightforward, the results are measurable, and the potential is enormous. If this approach scales to real farms, it could meaningfully reduce how much synthetic nitrogen agriculture demands.

The next steps involve field trials and working through regulatory pathways for gene-edited crops—a slower process in many countries, but one that's gradually becoming clearer. The researchers are already exploring how to optimize the system further and whether the same principle could work in other staple crops.

For a world where fertilizer costs and supply chains remain volatile, and where agriculture accounts for roughly a quarter of global greenhouse gas emissions, a self-fertilizing wheat plant wouldn't be revolutionary. It would just be practical.