Scientists working with researchers from Virginia Tech have identified unusual fungi that can trigger water to freeze more easily than normal. The discovery sheds light on how living organisms may influence ice formation in nature—and even the weather itself.
A Natural Ice-Making Protein
The research team discovered that certain fungi produce special proteins that act as ice nucleators. These molecules help water molecules organize themselves into ice crystals even at relatively mild sub-zero temperatures. Normally, pure water can remain liquid far below freezing unless particles help initiate ice formation.
By identifying the exact fungal gene responsible for producing this protein, scientists were able to better understand how the process works at the molecular level. Interestingly, the researchers believe the gene originally came from bacteria long ago through a process known as horizontal gene transfer, after which fungi modified it over time.
Why This Discovery Matters
The finding could have practical applications in several fields. One promising use is cloud seeding, a technique that encourages clouds to form ice crystals that later fall as rain. Traditional cloud-seeding materials such as silver iodide can be harmful, but fungal proteins might offer a safer biological alternative.
The proteins may also help improve technologies that rely on controlled freezing. For example, they could assist in producing frozen foods more efficiently or preserving sensitive biological materials like cells, eggs, or tissues by triggering ice formation at safer conditions.
Implications for Climate Science
Understanding how fungi influence ice formation could also improve climate research. Ice particles in clouds affect how sunlight interacts with the atmosphere, which in turn influences weather patterns and climate models. Learning how much these biological particles contribute to cloud processes could help scientists refine predictions about Earth’s climate system.
Overall, the study highlights an unexpected way in which microscopic organisms can shape natural processes—from rainfall to climate dynamics.
