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Title: Gene stacking of multiple traits for high yield of fermentable sugars in plant biomass

Journal Article · · Biotechnology for Biofuels
 [1];  [2];  [1];  [3];  [4];  [1];  [5]; ORCiD logo [6]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Joint BioEnergy Inst., Feedstocks Division
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Joint BioEnergy Inst., Feedstocks Division; Ecole Normale Superieure de Cachan, Cachan (France)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Joint BioEnergy Inst., Feedstocks Division; Technical Univ. of Denmark, Lyngby (Denmark)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Joint BioEnergy Inst., Feedstocks Division; Univ. of Copenhagen (Denmark). Dept. of Plant and Environmental Sciences; Univ. of Melbourne (Australia). School of BioSciences
  5. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Joint BioEnergy Inst., Feedstocks Division; Univ. Claude Bernard Lyon 1, Villeurbanne (France); Univ. of California, Berkeley, CA (United States). Dept. of Plant and Microbial Biology
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Joint BioEnergy Inst., Feedstocks Division; Univ. of California, Berkeley, CA (United States). Dept. of Plant and Microbial Biology

Second-generation biofuels produced from biomass can help to decrease dependency on fossil fuels, bringing about many economic and environmental benefits. To make biomass more suitable for biorefinery use, we need a better understanding of plant cell wall biosynthesis. Increasing the ratio of C6 to C5 sugars in the cell wall and decreasing the lignin content are two important targets in engineering of plants that are more suitable for downstream processing for second-generation biofuel production. Here, we have studied the basic mechanisms of cell wall biosynthesis and identified genes involved in biosynthesis of pectic galactan, including the GALS1 galactan synthase and the UDP-galactose/UDP-rhamnose transporter URGT1. We have engineered plants with a more suitable biomass composition by applying these findings, in conjunction with synthetic biology and gene stacking tools. Plants were engineered to have up to fourfold more pectic galactan in stems by overexpressing GALS1, URGT1, and UGE2, a UDP-glucose epimerase. Furthermore, the increased galactan trait was engineered into plants that were already engineered to have low xylan content by restricting xylan biosynthesis to vessels where this polysaccharide is essential. Finally, the high galactan and low xylan traits were stacked with the low lignin trait obtained by expressing the QsuB gene encoding dehydroshikimate dehydratase in lignifying cells. In conclusion, the results show that approaches to increasing C6 sugar content, decreasing xylan, and reducing lignin content can be combined in an additive manner. Thus, the engineered lines obtained by this trait-stacking approach have substantially improved properties from the perspective of biofuel production, and they do not show any obvious negative growth effects. The approach used in this study can be readily transferred to bioenergy crop plants.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1425435
Journal Information:
Biotechnology for Biofuels, Vol. 11, Issue 1; ISSN 1754-6834
Publisher:
BioMed CentralCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 25 works
Citation information provided by
Web of Science

References (44)

Optimizing pentose utilization in yeast: the need for novel tools and approaches journal January 2010
Expression of a bacterial 3-dehydroshikimate dehydratase reduces lignin content and improves biomass saccharification efficiency journal January 2015
Leaf biomechanical properties in Arabidopsis thaliana polysaccharide mutants affect drought survival journal November 2015
The Cooperative Activities of CSLD2, CSLD3, and CSLD5 Are Required for Normal Arabidopsis Development journal November 2011
Pectin Biosynthesis: GALS1 in Arabidopsis thaliana Is a β-1,4-Galactan β-1,4-Galactosyltransferase journal December 2012
Rhamnogalacturonan I in Solanum tuberosum tubers contains complex arabinogalactan structures journal May 2004
Hemicelluloses journal June 2010
Fasciclin-like arabinogalactan proteins: specialization for stem biomechanics and cell wall architecture in Arabidopsis and Eucalyptus: FLAs specialized for stem biomechanics and cell walls journal February 2010
The Arabidopsis REF8 gene encodes the 3-hydroxylase of phenylpropanoid metabolism journal April 2002
Genome-Wide Identification and Testing of Superior Reference Genes for Transcript Normalization in Arabidopsis journal September 2005
Analyzing real-time PCR data by the comparative CT method journal June 2008
Antisense Down-Regulation of 4CL Expression Alters Lignification, Tree Growth, and Saccharification Potential of Field-Grown Poplar journal August 2010
Use of Dinitrosalicylic Acid Reagent for Determination of Reducing Sugar journal March 1959
Unlocking the potential of lignocellulosic biomass through plant science journal October 2015
Interactions among three distinct CesA proteins essential for cellulose synthesis journal January 2003
Xylem development - from the cradle to the grave journal March 2015
Exploiting the Substrate Promiscuity of Hydroxycinnamoyl-CoA:Shikimate Hydroxycinnamoyl Transferase to Reduce Lignin journal February 2016
Down-regulation of hydroxycinnamoyl CoA: Shikimate hydroxycinnamoyl transferase in transgenic alfalfa affects lignification, development and forage quality journal June 2007
Engineering secondary cell wall deposition in plants journal November 2012
Engineering of plants with improved properties as biofuels feedstocks by vessel-specific complementation of xylan biosynthesis mutants journal January 2012
Accurate normalization of real-time quantitative RT-PCR data by geometric averaging of multiple internal control genes journal June 2002
Engineering of plant cell walls for enhanced biofuel production journal June 2015
Floral dip: a simplified method for Agrobacterium-mediated transformation of Arabidopsis thaliana journal December 1998
UDP-Glucose 4-Epimerase Isoforms UGE2 and UGE4 Cooperate in Providing UDP-Galactose for Cell Wall Biosynthesis and Growth of Arabidopsis thaliana journal May 2007
Regulation of Expression of Genes Involved in Quinate and Shikimate Utilization in Corynebacterium glutamicum journal April 2009
The NAC Transcription Factors NST1 and NST2 of Arabidopsis Regulate Secondary Wall Thickenings and Are Required for Anther Dehiscence journal October 2005
Localization of Pectic Galactan in Tomato Cell Walls Using a Monoclonal Antibody Specific to (1[->]4)-[beta]-D-Galactan journal April 1997
Genetic evidence for three unique components in primary cell-wall cellulose synthase complexes in Arabidopsis journal September 2007
Design, implementation and practice of JBEI-ICE: an open source biological part registry platform and tools journal June 2012
ARABINAN DEFICIENT 1 Is a Putative Arabinosyltransferase Involved in Biosynthesis of Pectic Arabinan in Arabidopsis journal December 2005
Self-processing 2A-polyproteins - a system for co-ordinate expression of multiple proteins in transgenic plants journal February 1999
The Golgi localized bifunctional UDP-rhamnose/UDP-galactose transporter family of Arabidopsis journal July 2014
Distinct and conserved transcriptomic changes during nematode-induced giant cell development in tomato compared with Arabidopsis: a functional role for gene repression journal February 2013
A robust gene-stacking method utilizing yeast assembly for plant synthetic biology journal October 2016
Efficient transformation of Agrobacterium spp. by high voltage electroporation journal January 1989
Characterization of the LM5 pectic galactan epitope with synthetic analogues of β-1,4-d-galactotetraose journal December 2016
Biosynthesis of Pectin journal April 2010
Comparison of five xylan synthesis mutants reveals new insight into the mechanisms of xylan synthesis journal December 2007
NIH Image to ImageJ: 25 years of image analysis journal June 2012
Yeast metabolic engineering for hemicellulosic ethanol production journal June 2009
A gene stacking approach leads to engineered plants with highly increased galactan levels in Arabidopsis journal December 2014
Drilling accurate nanopores for biosensors by energetic multi-wall carbon nanotubes: a molecular dynamics investigation journal September 2022
Influence of cluster thinning and girdling on aroma composition in ‘Jumeigui’ table grape journal April 2020
Inhibition of acetyl-CoA carboxylase by spirotetramat causes growth arrest and lipid depletion in nematodes journal July 2020

Cited By (6)

Transcriptome analysis highlights key differentially expressed genes involved in cellulose and lignin biosynthesis of sugarcane genotypes varying in fiber content journal August 2018
The Three Members of the Arabidopsis Glycosyltransferase Family 92 are Functional β-1,4-Galactan Synthases journal September 2018
Plant synthetic biology could drive a revolution in biofuels and medicine journal September 2018
Increased drought tolerance in plants engineered for low lignin and low xylan content journal July 2018
A screening method to identify efficient sgRNAs in Arabidopsis, used in conjunction with cell-specific lignin reduction journal May 2019
Engineering of Bioenergy Crops: Dominant Genetic Approaches to Improve Polysaccharide Properties and Composition in Biomass journal March 2020