期刊
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
卷 100, 期 24, 页码 10237-10249出版社
SPRINGER
DOI: 10.1007/s00253-016-7955-0
关键词
Ionic liquid tolerance; Microbial community enrichment; Ionic liquid pretreatment; Engineering ionic liquid tolerance
资金
- National Institute of Food and Agriculture [CA-D-BAE-2228-RR]
- UC Lab Fees Research Program [237496]
- Joint BioEnergy Institute
- US Department of Energy, Office of Science, Office of Biological and Environmental Research [DE-AC02-05CH11231]
Chemical and physical pretreatment of biomass is a critical step in the conversion of lignocellulose to biofuels and bioproducts. Ionic liquid (IL) pretreatment has attracted significant attention due to the unique ability of certain ILs to solubilize some or all components of the plant cell wall. However, these ILs inhibit not only the enzyme activities but also the growth and productivity of microorganisms used in downstream hydrolysis and fermentation processes. While pretreated biomass can be washed to remove residual IL and reduce inhibition, extensive washing is costly and not feasible in large-scale processes. IL-tolerant microorganisms and microbial communities have been discovered from environmental samples and studies begun to elucidate mechanisms of IL tolerance. The discovery of IL tolerance in environmental microbial communities and individual microbes has lead to the proposal of molecular mechanisms of resistance. In this article, we review recent progress on discovering IL-tolerant microorganisms, identifying metabolic pathways and mechanisms of tolerance, and engineering microorganisms for IL tolerance. Research in these areas will yield new approaches to overcome inhibition in lignocellulosic biomass bioconversion processes and increase opportunities for the use of ILs in biomass pretreatment.
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