A new study has shown that putting the water-use-efficient and turbo-charged photosynthesis from plants such as agave into woody biomass plants can hedge against high temperatures and low moisture. It can also enable growers to plant dedicated energy crops on marginal land.
A team of researchers including John Cushman, a biochemistry professor at the University of Nevada, Reno; Xiaohan Yang at the Oak Ridge National Laboratory (ORNL); James Hartwell at the University of Liverpool, UK; and Anne Borland at Newcastle University, UK and ORNL are exploring the genetic mechanisms of crassulacean acid metabolism (CAM) and drought tolerance in desert-adapted plants as a way to improve drought resistance for biofuel crops.
The study is part of a five-year, multi-institutional $14.3 million U.D. Department of Energy (DOE) grant, “Engineering CAM Photosynthetic Machinery into Bioenergy Crops for Biofuels Production in Marginal Environments.” The funds are through the DOE’s Office of Biological and Environmental Research, Genomic Science: Biosystems Design to Enable Next-Generation Biofuels.
The team will develop novel technologies to redesign bioenergy crops to grow on economically marginal agricultural lands and produce yields of biomass that can readily be converted to biofuels. The development of water-use efficient, fast-growing trees such as poplar for such sites will also help reduce competition with food crops for usable farmland according to the research team.
“With climate change predictions for a 7 degree Fahrenheit (3.8 degree C) increase in temperature and a decrease in reliable precipitation patterns by 2080 for much of America’s breadbasket, and with a greater need for sources of biofuels for transportation, these biodesign approaches to enhancing biomass production become very important,” Cushman, director of the project, said.