Dirigent domain-containing protein is part of the machinery required for formation of the lignin-based Casparian strip in the root.

ABSTRACT: The endodermis acts as a "second skin" in plant roots by providing the cellular control necessary for the selective entry of water and solutes into the vascular system. To enable such control, Casparian strips span the cell wall of adjacent endodermal cells to form a tight junction that blocks extracellular diffusion across the endodermis. This junction is composed of lignin that is polymerized by oxidative coupling of monolignols through the action of a NADPH oxidase and peroxidases. Casparian strip domain proteins (CASPs) correctly position this biosynthetic machinery by forming a protein scaffold in the plasma membrane at the site where the Casparian strip forms. Here, we show that the dirigent-domain containing protein, enhanced suberin1 (ESB1), is part of this machinery, playing an es

SUBMITTER: Hosmani PS 

PROVIDER: S-EPMC3761638 | biostudies-literature | 2013 Aug

REPOSITORIES: biostudies-literature