Genetic Tweak Brings Big Boost In Algae Biomass

Wired.com
By Chuck Squatriglia
November 22, 2011 8:00 am

Researchers at Iowa State University have discovered how to make algae produce 50 to 80 percent more biomass, a finding that could foster the production of algal biofuel. The trick involves expressing, or activating, two genes that promote photosynthesis.

In nature, algal growth is governed by the amount of carbon dioxide available. In relatively low carbon environments, two genes — LCIA and LCIB — are expressed to capture more CO2 and direct it into the cells, promoting growth. However, when algae live in an environment with enough CO2 to promote growth, the two genes shut down. The researchers found that expressing them, even in carbon-rich environments, significantly increases growth.

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