A new protein, trigalactosyldiacylglycerol 4, or TGD4, necessary for chloroplast development has been identified by scientists at Michigan State University. The discovery, they say, could ultimately lead to plant varieties tailored specifically for biofuel production. "This protein directly affects photosynthesis and how plants create biomass (stems, leaves and stalks) and oils", explained Christoph Benning, MSU professor of biochemistry and molecular biology.

Understanding how TGD4 works may allow scientists to create plants that would be used exclusively to produce biofuels, possibly making the process more cost-effective. Most plants that are used to produce oils – corn, soybeans and canola, for example – accumulate the oil in their seeds.

"We've found that if the TGD4 protein is malfunctioning, the plant then accumulates oil in its leaves," Benning said. "If the plant is storing oil in its leaves, there could be more oil per plant, which could make production of biofuels such as biodiesel more efficient. More research is needed so we can completely understand the mechanism of operation."

Other members of the MSU research team are: Changcheng Xu, research assistant professor of biochemistry and molecular biology; Jilian Fan, research technician; and Adam Cornish, biochemistry undergraduate student at the time of the research and current graduate student.

The research was funded by the Energy Department and the National Science Foundation. Benning's research also is supported by the Michigan Agricultural Experiment Station.