New research could simplify genetic transfer of nitrogen fixation to food crops

In a study published in Proceedings of the National Academy of Sciences, researchers from Utah State University and their international colleagues have unveiled new findings that could significantly advance the genetic engineering of nitrogen fixation in food crops. The team, led by biochemists Lance Seefeldt and Zhi-Yong Yang, discovered a streamlined method involving just seven key genes that enable cereal crops like corn and rice to convert atmospheric nitrogen into usable nutrients.

Historically, nitrogen, essential for plant growth, has been supplied through synthetic fertilizers, a method heavily reliant on the Haber-Bosch process developed over a century ago. While effective in boosting global food production, this process requires substantial fossil fuel inputs and has a considerable environmental footprint. In contrast, the ability of crops to fix nitrogen from the air using only sunlight could dramatically reduce the need for chemical fertilizers and mitigate associated carbon emissions.

Seefeldt and Yang, working with scientists from the Polytechnic University of Madrid and Carnegie Mellon University, focused on integrating nitrogen-fixing genes into plant mitochondria and chloroplasts. This approach would allow plants to produce fertilizers independently, potentially transforming agricultural practices, especially in regions like Sub-Saharan Africa, where access to synthetic fertilizers is limited.

The breakthrough also extends to space agriculture, supporting long-duration missions and potential colonization efforts by providing a sustainable method to grow crops in extraterrestrial environments.

As the world grapples with the dual challenges of climate change and growing food demand, this research offers a promising avenue toward more sustainable and resilient agricultural systems. The team’s ongoing work seeks to further refine the genetic combinations necessary for effective nitrogen fixation in plants, aiming to orchestrate a full symphony of genetic activity for optimal nutrient synthesis.