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A hack to the photosynthesis of tobacco increased its growth by 40 percent, researchers reported today in Science. The team now hopes to make similar changes to soybeans, potatoes, and other food crops.
The researchers from US Department of Agriculture and the University of Illinois at Urbana-Champaign introduced genetic constructs that tweaked a process called photorespiration in tobacco plants. Photorespiration occurs when an enzyme named Rubisco accidentally grabs an oxygen molecule instead of the carbon dioxide that plants need for growth. This snafu, which occurs roughly 20 percent of the time, results in a plant making a toxic chemical called glycolate.
To get rid of the glycolate, plants transform it into useful compounds through a series of chemical reactions that happen in multiple parts of the cell and reduce the photosynthetic efficiency by up to 50 percent. To recover efficiency, researchers gave their tobacco plants genetic instructions ...
