Scientists Crack Code to Make Plants Absorb More Nitrogen

Right now, plants waste about half the fertilizer farmers apply to their fields, leaving excess nitrogen to poison water supplies downstream. But scientists just figured out how to make crops hungrier.

Researchers at New York University identified the exact protein that tells plants to stop eating nitrogen. When plants convert enough raw nitrogen into organic nutrients, they trigger a protein called HHO5 that signals their roots to quit absorbing more.

"By identifying gene regulators that are sensitive to different levels and types of nitrogen, we uncovered a regulatory factor controlling nitrogen use," said Gloria Coruzzi, an NYU professor who co-authored the study published in The Plant Cell. Think of it like finding the biological "I'm full" button in plants.

Here's where it gets exciting. Will Hinkley, the NYU doctoral student who led the research, explains that scientists could potentially engineer crops that bypass this signal mechanism entirely.

"This knowledge may aid the engineering of 'gluttonous' plant varieties that absorb more available nitrogen," Hinkley said. He compared it to an inverse GLP-1 drug (like Ozempic), but instead of making you feel full, it makes plants stay hungry.

The Ripple Effect

The potential impacts stretch far beyond individual farms. If crops can absorb more of the nitrogen farmers already apply, it means three major wins happening at once.

First, farmers would spend less money on fertilizer since their crops would actually use what gets applied. Second, agricultural communities could see dramatically reduced nitrate pollution leaching into rivers and groundwater. Third, the same crops could produce higher yields by taking in more nutrients.

Communities downstream of farmland have worried about excess nitrates in their water supplies for decades. This breakthrough could finally address that environmental challenge while helping farmers save money.

The timing couldn't be better either. With fertilizer costs remaining high and environmental regulations tightening, farmers need solutions that boost both their bottom line and their sustainability.

The research team is now working on the next phase: actually engineering these nitrogen-hungry plant varieties and testing them in real field conditions.