Mosses, like other plants, are exposed to a wide range of environmental conditions, including cold temperatures. To survive in these conditions, they have evolved various mechanisms to protect themselves from freezing damage. One of these mechanisms is the production of antifreeze proteins (AFPs).

AFPs are proteins that bind to ice crystals and prevent them from growing larger. This prevents the formation of large ice crystals that can damage cell membranes and other cellular structures. AFPs have been found in a variety of plants, including mosses, and are thought to play an important role in their cold tolerance.

However, the mechanism by which AFPs are produced in mosses has not been well understood. In a new study, biologists from the University of Helsinki have shown for the first time that mosses have a specific gene that encodes an AFP. This gene is expressed in response to cold temperatures, and the AFP produced by this gene is able to bind to ice crystals and prevent them from growing larger.

This study provides new insights into the molecular mechanisms of cold tolerance in mosses. It also suggests that AFPs may be a potential target for genetic engineering to improve the cold tolerance of other plants, such as crops.

The study was published in the journal Plant Physiology.