Compensatory Guaiacyl Lignin Biosynthesis at the Expense of Syringyl Lignin in <i>4CL1</i> -Knockout Poplar
Chung‐Jui Tsai, Peng Xu, Liang‐Jiao Xue, Hao Hu, Batbayar Nyamdari, Radnaa Naran, Xiaohong Zhou, Geert Goeminne, Ruili Gao, Erica Gjersing, Joseph Dahlen, Sivakumar Pattathil, Michael G. Hahn, Mark F. Davis, John Ralph, Wout Boerjan, Scott A. Harding
Abstract
-knockout appear to have enabled 4CL5 catalysis at a level sufficient to sustain lignification. Finally, genes involved in sulfur assimilation, the glutathione-ascorbate cycle, and various antioxidant systems were upregulated in the mutants, suggesting cascading responses to perturbed thioesterification in lignin biosynthesis.
Topics & Concepts
LigninXylemDownregulation and upregulationBiochemistryChemistryMonolignolBiosynthesisMutantBiologyBotanyGeneOrganic chemistryPlant Gene Expression AnalysisLignin and Wood ChemistryBiochemical and biochemical processes