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Systematic approaches to C-lignin engineering in Medicago truncatula | Biotechnology for Biofuels and Bioproducts

C-lignin is a homopolymer of caffeyl alcohol present in the seed coats of a variety of plant species including vanilla orchid, various cacti, and the ornamental plant Cleome hassleriana. Because of its unique chemical and physical properties, there is considerable interest in engineering C-lignin into the cell walls of bioenergy crops as a high-value co-product of bioprocessing. We have used information from a transcriptomic analysis of developing C. hassleriana seed coats to suggest strategies for engineering C-lignin in a heterologous system, using hairy roots of the model legume Medicago truncatula. We systematically tested strategies for C-lignin engineering using a combination of gene overexpression and RNAi-mediated knockdown in the caffeic acid/5-hydroxy coniferaldehyde 3/5-O-methyltransferase (comt) mutant background, monitoring the outcomes by analysis of lignin composition and profiling of monolignol pathway metabolites. In all cases, C-lignin accumulation required strong dow ....

United States , Bioanalytical Facility Of The Biodiscovery Institute , University Of North Texas , Gene Universal , Jing Ke Weng , Minelute Cleanup Kit , Life Technologies , Bioanalytical Facility , Biodiscovery Institute , North Texas , Triple Quadrupole ,