期刊
NATURE PLANTS
卷 5, 期 2, 页码 225-+出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41477-018-0350-3
关键词
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资金
- National Commission for Scientific and Technological Research (Chile)
- SBO-FISH through the ARBOREF project
- Institute for the Promotion of Innovation through Science and Technology in Flanders (IWT-Vlaanderen)
- Science Without Borders program from CNPq [206329/2014-8]
- Research Foundation-Flanders (FWO) [G0C1914N]
- Stanford University's Global Climate and Energy Program (GCEP)
- PDM KULeuven
- BIOWOOD (FWO-SBO)
- DOE Great Lakes Bioenergy Research Center (DOE BER Office of Science) [DE-FC02-07ER64494, DE-SC0018409]
- FWO
- CLEM
Lignin is the main cause of lignocellulosic biomass recalcitrance to industrial enzymatic hydrolysis. By partially replacing the traditional lignin monomers by alternative ones, lignin extractability can be enhanced. To design a lignin that is easier to degrade under alkaline conditions, curcumin (diferuloylmethane) was produced in the model plant Arabidopsis thaliana via simultaneous expression of the turmeric (Curcuma longa) genes DIKETIDE-CoA SYNTHASE (DCS) and CURCUMIN SYNTHASE 2 (CURS2). The transgenic plants produced a plethora of curcumin-and phenylpentanoid-derived compounds with no negative impact on growth. Catalytic hydrogenolysis gave evidence that both curcumin and phenylpentanoids were incorporated into the lignifying cell wall, thereby significantly increasing saccharification efficiency after alkaline pretreatment of the transgenic lines by 14-24% as compared with the wild type. These results demonstrate that non-native monomers can be synthesized and incorporated into the lignin polymer in plants to enhance their biomass processing efficiency.
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