Air Date: Week of August 13, 2004

Living on Earth’s Jennifer Chu reports on research that may eventually lead to customized tree stands.

Transcript

CURWOOD: It’s Living on Earth, I’m Steve Curwood. Coming up…the use of mercury in cultural rituals. First, this Note on Emerging Science from Jennifer Chu.

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CHU: Picture row upon row of hardwood trees planted for the sole purpose of becoming furniture. Or trees perfect for paper production. These genetically-engineered “trees of the future” may not be that far off. Scientists have now figured out a way to quickly identify the genes that control specific traits in poplar trees.

To get the perfect flower color or the meatiest apple, growers mate parent plants that hold desirable traits. But there’s no guarantee the pairing will pay off. And because of the long life-span of trees, it could take decades to complete a test cycle.

But with the new approach scientists can see results in about a year. Researchers randomly inserted foreign pieces of DNA into the poplar genome. This infiltrator exactly mimics the expression pattern of a poplar gene which, in turn, provides clues about that gene’s function.

For example, one scientist hopes to grow trees the way we grow houseplants – by taking a cutting, putting it in water, and having it take root. He’s identified 35 out of the poplar’s 36,000 genes that likely play a role in root formation. Next, he’ll try to transfer a houseplant’s genes into the poplar genome to see if he can get an entire poplar tree to take root in water.

That’s this week’s Note on Emerging Science, I’m Jennifer Chu.

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