| Authors | Lina Gallego-Giraldo, Chang Liu, Sara Pose-Albacete, Sivakumar Pattathil, Angelo Gabriel Peralta, Jenna Young, Jan Westpheling, Michael G Hahn, Xiaolan Rao, J Paul Knox, Barbara De Meester, Wout Boerjan, Richard A Dixon |
| Publication Date | 2020-02-11 |
| Journal | Proceedings of the National Academy of Sciences |
| Volume | 117 |
| Issue | 6 |
| Pages | 3281-3290 |
| Publisher | National Academy of Sciences |
| Description | There is considerable interest in engineering plant cell wall components, particularly lignin, to improve forage quality and biomass properties for processing to fuels and bioproducts. However, modifying lignin content and/or composition in transgenic plants through down-regulation of lignin biosynthetic enzymes can induce expression of defense response genes in the absence of biotic or abiotic stress. Arabidopsis thaliana lines with altered lignin through down-regulation of hydroxycinnamoyl CoA:shikimate/quinate hydroxycinnamoyl transferase (HCT) or loss of function of cinnamoyl CoA reductase 1 (CCR1) express a suite of pathogenesis-related (PR) protein genes. The plants also exhibit extensive cell wall remodeling associated with induction of multiple cell wall-degrading enzymes, a process which renders the corresponding biomass a substrate for growth of the cellulolytic thermophile Caldicellulosiruptor … |
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