CORVALLIS, Ore. Scientists have confirmed the function of a gene that controls the awakening of trees from winter dormancy, a critical factor in their ability to adjust to environmental changes associated with climate change.
While other researchers have identified genes involved in producing the first green leaves of spring, the discovery of a master regulator in poplar trees (Populus species) could eventually lead to breeding plants that are better adapted for warmer climates.
The results of the study that began more than a decade ago at Oregon State University were published today in the Proceedings of the National Academy of Sciences, by scientists from Michigan Technological University and Oregon State.
"No one has ever isolated a controlling gene for this timing in a wild plant, outside of Arabidopsis, a small flowering plant related to mustard and cabbage," said Steve Strauss, co-author and distinguished professor of forest biotechnology at OSU. "This is the first time a gene that controls the timing of bud break in trees has been identified."
The timings of annual cycles when trees open their leaves, when they produce flowers, when they go dormant help trees adapt to changes in environmental signals like those associated with climate, but the genetics have to keep up, Strauss said.
While trees possess the genetic diversity to adjust to current conditions, climate models suggest that temperature and precipitation patterns in many parts of the world may expose trees to more stressful conditions in the future. Experts have suggested that some tree species may not be able to cope with these changes fast enough, whether by adaptation or migration. As a result, forest health may decline, trees may disappear from places they are currently found, and some species may even go extinct.
"For example, are there going to be healthy and widespread populations of Douglas fir
|Contact: Steven Strauss|
Oregon State University