SPINDLY, ERECTA, and Its Ligand STOMAGEN Have a Role in Redox-Mediated Cortex Proliferation in the Arabidopsis Root

• DOI: 10.1093/mp/ssu106
• Publication Date: 2014-09-30T02:10:58Z
• Authors: Hongchang Cui; Danyu Kong; Pengcheng Wei; Yueling Hao; Keiko U. Torii; Jin Suk Lee; Jie Li
• Keywords: Endodermis

Reactive oxygen species (ROS) are harmful to all living organisms and therefore they must be removed ensure normal growth development. ROS also signaling molecules, but so far little is known about the mechanisms of perception developmental response in plants. We here report that hydrogen peroxide induces cortex proliferation Arabidopsis root SPINDLY (SPY), an O-linked glucosamine acetyltransferase, regulates by maintaining cellular redox homeostasis. found mutation leucine-rich receptor kinase ERECTA its putative peptide ligand STOMAGEN block effect on proliferation. However, expressed vascular tissue, whereas extra cells produced from endodermis, suggesting involvement intercellular signaling. SPY appears act downstream ERECTA, because spy still caused erecta mutant background. have not only gained insight into mechanism which development uncovered a novel pathway for The importance redox-mediated as protective against oxidative stress discussed.