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Research Project: Health-Promoting Bioactives and Biobased Pesticides from Medicinal and Herbal Crops Location:
                                Natural Products Utilization Research Title:   Author  item
                                            JOYCE, BLAKE - University Of Tennesseeitem
                                            ZHELJAZKOV, VALTCHO - Oregon State Universityitem
                                            SYKES, ROBERT - National Renewable Energy Laboatoryitem
                                            Cantrell, Charlesitem
                                            HAMILTON, CHOO - Oak Ridge National Laboratoryitem
                                            MANN, DAVID - Oak Ridge National Laboratoryitem
                                            RODRIQUEZ, MIGUEL - Oak Ridge National Laboratoryitem
                                            MIELENZ, JONATHAN - Oak Ridge National Laboratoryitem
                                            ASTATKIE, TESSEMA - Dalhousie Universityitem
                                            STEWART, JR., C. NEAL - Dalhousie University
  Submitted to: PLOS ONE
                                    Publication Type: Peer Reviewed Journal
                                    Publication Acceptance Date: 9/10/2015
                                    Publication  Date: 10/5/2015
                                    Publication URL: http://handle.nal.usda.gov/10113/62576Citation: Joyce, B.L., Zheljazkov, V.D., Sykes, R., Cantrell, C.L., Hamilton, C., Mann, D.G., Rodriquez, M., Mielenz, J., Astatkie, T., Stewart, Jr., C. 2015. Ethanol and high-value terpene co-production from lignocellulosic biomass of Cymbopogon flexuosus and Cymbopogon martinii. PLoS One. 10(10):1-17. doi:10.1371/journal.pone.0139195Interpretive Summary: Replacing petroleum as a natural resource extends beyond producing renewable liquid fuels. Petroleum products shape modern life: plastics, lubricants, asphalt, and petrochemicals for reagents in chemical synthesis, synthetic fibers for textiles, cosmetics, flavoring and food additives, surfactants and cleaning chemicals. Liquid fuels are currently necessary to maintain modern transportation and industrial infrastructure. Coproduction of high-value commodities from lignocellulosic sources has recently become a major focus of research.  Lemongrass and palmarosa are perennial grasses grown to produce essential oils for the fragrance industry. The objectives of this study were (1) to evaluate biomass and oil yields as a function of nitrogen and sulfur fertilization, and (2) to characterize their utility for lignocellulosic ethanol compared to switchgrass. These data suggest that dual use crops such as lemongrass and palmarosa may increase the economic viability of lignocellulosic biofuels.
                                Technical Abstract: Cymbopogon flexuosus and C. martinii are perennial grasses grown to produce essential oils for the fragrance industry. The objectives of this study were (1) to evaluate biomass and oil yields as a function of nitrogen and sulfur fertilization, and (2) to characterize their utility for lignocellulosic ethanol compared to Panicum virgatum (switchgrass). Mean biomass yields were 12.83 Mg lemongrass ha-1 and 15.11 Mg palmarosa ha-1 during the second harvest year resulting in theoretical biofuel yields of 2541 and 2569 L ethanol ha-1 respectively compared to reported 1749-3691 L ethanol ha-1 for switchgrass. Pretreated lemongrass yielded 198 mL ethanol (g biomass)-1 and pretreated palmarosa yielded 170 mL. Additionally, lemongrass yielded 85.7 kg essential oil ha-1 and palmarosa yielded 67.0 kg ha-1 with an estimated value of (USD) 857 and 1005 ha-1. These data suggest that dual use crops such as lemongrass and palmarosa may increase the economic viability of lignocellulosic biofuels.


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