At the annual meeting of the American Society of Plant Biologists in Chicago (July 7-11, 2007), scientists will present findings on how to economically and efficiently produce plant crops suitable for sustainable bioenergy. Improving the production of such biomass is important because it should significantly ease and eventually replace dependence on petroleum-based fuels. Biomass is plant material, vegetation or agricultural waste used as fuel.
Converting biomass into biofuels can be costly and slow. Two crops, both classified as C4 perennial grasses, have been studied extensively to determine how best to improve costs and production rates. Switchgrass (Panicum virgatum) has been trialed across the United States. Miscanthus (Miscanthus x giganteus) has been studied throughout the European Union. Both show great promise, but until now, nobody has been sure which crop is more efficacious. The study completed by Frank Dohleman of the Plant Biology Department at University of Illinois at Urbana-Champaign and his colleagues, is the first to compare the productivity of the two grasses in side-by-side field trials. Results from trials throughout Illinois show that Miscanthus is more than twice as productive as switchgrass.
Dohleman’s team, which included Dafu Wang, Andrew D.B. Leakey & Stephen P. Long also of University of Illinois, along with Emily A. Heaton of Ceres Inc., theorized that Miscanthus produces more usable biomass than switchgrass because of these three key attributes:1. Miscanthus can gain greater amounts of photosynthetic carbon per unit of leaf area
Unraveling the mystery of why Miscanthus is the more productive crop will enable researchers to engineer this and other potential bioenergy crops. These developments will increase production options as well as support efforts within biofuel research and industry to work with non-food based biomass resources.
Brian Hyps | EurekAlert!
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