Wood Formation in Trees Is Increased by Manipulating PXY-Regulated Cell Division

• DOI: 10.1016/j.cub.2015.02.023
• Publication Date: 2015-04-11T07:23:32Z
• Authors: J. Peter Etchells; Laxmi S. Mishra; Manoj Kumar; Liam Campbell; Simon R. Turner
• Keywords: 0301 basic medicine; 571; Agricultural and Biological Sciences(all); kinase; Biochemistry, Genetics and Molecular Biology(all); Arabidopsis Proteins; proliferation; Molecular Sequence Data; Arabidopsis; 15. Life on land; downstream; Wood; Trees; Up-Regulation; 03 medical and health sciences; wox4; Gene Expression Regulation, Plant; Report; stem; Oligopeptides; Protein Kinases; Cell Division; Signal Transduction

The woody tissue of trees is composed xylem cells that arise from divisions stem within the cambial meristem. rate cell formation dependent upon division cambium and controlled by both genetic environmental factors. In annual plant Arabidopsis, signaling between a peptide ligand CLE41 receptor kinase PXY controls divisions; however, pathway regulating secondary growth in has not been identified. Here, we show an aspen PttPXY its PttCLE41 are functional orthologs act to control multifunctional regulates organization. Ectopic overexpression genes hybrid resulted vascular abnormalities poor growth. contrast, precise tissue-specific generated exhibited 2-fold increase wood formation, were taller, possessed larger leaves compared controls. Our results demonstrate PXY-CLE evolved regulate manipulating this can result dramatically increased tree productivity.