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Title: Knockdown of a laccase in Populus deltoides confers altered cell wall chemistry and increased sugar release

Journal Article · · Plant Biotechnology Journal
DOI:https://doi.org/10.1111/pbi.12560· OSTI ID:1247616

Plant laccases are thought to function in the oxidation of monolignols which leads to higher order lignin formation. Only a hand-full of laccases in plants have been functionally evaluated and as such little is known about the breadth of their impact on cell wall chemistry or structure. Here we describe a previously uncharacterized laccase from Populus, encoded by locus Potri.008G06400, whose reduced expression resulted in transgenic Populus trees with changes in syringyl/guaiacyl (S/G) ratios as well as altered sugar release phenotypes. These phenotypes are consistent with plant biomass exhibiting reduced recalcitrance. Interestingly, the transgene effect on recalcitrance is dependent on a mild pretreatment prior to chemical extraction of sugars. Metabolite profiling suggests the transgene modulates phenolics that are associated with the cell wall structure. Finally, we propose a model in which this particular laccase has a range of functions related to oxidation of phenolics that interact with lignin in the cell wall.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). BioEnergy Science Center (BESC); National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
DE‐AC05‐00OR22725; DE‐FG02‐93ER20097; AC05-00OR22725; FG02-93ER20097; AC36-08GO28308
OSTI ID:
1247616
Alternate ID(s):
OSTI ID: 1247617; OSTI ID: 1311231; OSTI ID: 1325508
Report Number(s):
NREL/JA-5100-66207
Journal Information:
Plant Biotechnology Journal, Journal Name: Plant Biotechnology Journal Vol. 14 Journal Issue: 10; ISSN 1467-7644
Publisher:
Wiley-BlackwellCopyright Statement
Country of Publication:
United Kingdom
Language:
English
Citation Metrics:
Cited by: 51 works
Citation information provided by
Web of Science

References (47)

The laccase multigene family in Arabidopsis thaliana: towards addressing the mystery of their gene function(s) journal November 2010
Normal-12 and Brown Midrib-12 Sorghum. II. Chemical Variations and Digestibility1 journal January 1986
Fungal laccases – occurrence and properties journal March 2006
Tricin, a Flavonoid Monomer in Monocot Lignification journal February 2015
High-level hemicellulosic arabinose predominately affects lignocellulose crystallinity for genetically enhancing both plant lodging resistance and biomass enzymatic digestibility in rice mutants journal November 2014
Biomass digestibility is predominantly affected by three factors of wall polymer features distinctive in wheat accessions and rice mutants journal January 2013
The dual effects of lignin content on enzymatic hydrolysis using film composed of cellulose and lignin as a structure model journal January 2016
Lignin content in natural Populus variants affects sugar release journal March 2011
A Laccase Associated with Lignification in Loblolly Pine Xylem journal April 1993
Lignin modification improves fermentable sugar yields for biofuel production journal June 2007
Characterization and localization of laccase forms in stem and cell cultures of sycamore journal January 1992
The origin and evolution of lignin biosynthesis: Tansley review journal June 2010
Disruption of LACCASE4 and 17 Results in Tissue-Specific Alterations to Lignification of Arabidopsis thaliana Stems journal March 2011
Priming in Systemic Plant Immunity journal April 2009
High-Throughput Screening of Plant Cell-Wall Composition Using Pyrolysis Molecular Beam Mass Spectroscopy book January 2009
Insect multicopper oxidases: Diversity, properties, and physiological roles journal March 2010
Ptr-miR397a is a negative regulator of laccase genes affecting lignin content in Populus trichocarpa journal June 2013
MEGA5: Molecular Evolutionary Genetics Analysis Using Maximum Likelihood, Evolutionary Distance, and Maximum Parsimony Methods journal May 2011
Biochemical characterization, molecular cloning and expression of laccases - a divergent gene family - in poplar journal January 1999
Biomass equations for sixty-five North American tree species journal September 1997
SignalP 4.0: discriminating signal peptides from transmembrane regions journal September 2011
Structural characterization of alkaline hydrogen peroxide pretreated grasses exhibiting diverse lignin phenotypes journal January 2012
Engineering of plant cell walls for enhanced biofuel production journal June 2015
Progress in the biological synthesis of the plant cell wall: new ideas for improving biomass for bioenergy journal June 2012
Galacturonosyltransferase 4 silencing alters pectin composition and carbon partitioning in tomato journal April 2013
Gene structure and molecular analysis of the laccase-like multicopper oxidase (LMCO) gene family in Arabidopsis thaliana journal June 2005
Mutant identification and characterization of the laccase gene family in Arabidopsis journal June 2006
Lignin extraction distinctively enhances biomass enzymatic saccharification in hemicelluloses-rich Miscanthus species under various alkali and acid pretreatments journal May 2015
The Arabidopsis Information Resource (TAIR): a comprehensive database and web-based information retrieval, analysis, and visualization system for a model plant journal January 2001
Mechanisms of intrinsic resistance to antimicrobial peptides of Edwardsiella ictaluri and its influence on fish gut inflammation and virulence journal July 2013
Hemicelluloses negatively affect lignocellulose crystallinity for high biomass digestibility under NaOH and H2SO4 pretreatments in Miscanthus journal January 2012
LACCASE Is Necessary and Nonredundant with PEROXIDASE for Lignin Polymerization during Vascular Development in Arabidopsis journal October 2013
Phytozome: a comparative platform for green plant genomics journal November 2011
Laccase from Sycamore Maple ( Acer pseudoplatanus ) Polymerizes Monolignols journal July 1992
Characterization of cDNAs encoding putative laccase-like multicopper oxidases and developmental expression in the tobacco hornworm, Manduca sexta, and the malaria mosquito, Anopheles gambiae journal January 2004
Clonal differences in biomass characteristics, coppice ability, and biomass prediction equations among four Populus clones grown in eastern North Dakota journal March 1992
Downregulation of GAUT12 in Populus deltoides by RNA silencing results in reduced recalcitrance, increased growth and reduced xylan and pectin in a woody biofuel feedstock journal January 2015
Monolignol Ferulate Transferase Introduces Chemically Labile Linkages into the Lignin Backbone journal April 2014
Molecular docking and dynamics simulation analyses unraveling the differential enzymatic catalysis by plant and fungal laccases with respect to lignin biosynthesis and degradation journal November 2014
Deconstruction of Lignocellulosic Biomass to Fuels and Chemicals journal July 2011
The Minor Wall-Networks between Monolignols and Interlinked-Phenolics Predominantly Affect Biomass Enzymatic Digestibility in Miscanthus journal August 2014
Analysis of Relative Gene Expression Data Using Real-Time Quantitative PCR and the 2−ΔΔCT Method journal December 2001
Generation and characterization of transgenic poplar plants overexpressing a cotton laccase gene journal April 2008
Bioprocessing for biofuels journal June 2012
Laccases and their occurrence in prokaryotes journal February 2003
Laccase Down-Regulation Causes Alterations in Phenolic Metabolism and Cell Wall Structure in Poplar journal April 2002
Laccase: enzyme revisited and function redefined journal June 2008