Pinoresinol reductase 1 impacts lignin distribution during secondary cell wall biosynthesis in Arabidopsis

Loss of function of the gene encoding pinoresinol reductase 1, which is co-expressed with cell wall biosynthetic genes in Arabidopsis thaliana, not only impairs accumulation of lignans in stem tissue, but also alters lignin structure and reduces accumulation of lignin, particularly in interfascicular fibers.