Diffusible repression of cytokinin signalling produces endodermal symmetry and passage cells.

ABSTRACT: In vascular plants, the root endodermis surrounds the central vasculature as a protective sheath that is analogous to the polarized epithelium in animals, and contains ring-shaped Casparian strips that restrict diffusion. After an initial lag phase, individual endodermal cells suberize in an apparently random fashion to produce 'patchy' suberization that eventually generates a zone of continuous suberin deposition. Casparian strips and suberin lamellae affect paracellular and transcellular transport, respectively. Most angiosperms maintain some isolated cells in an unsuberized state as so-called 'passage cells', which have previously been suggested to enable uptake across an otherwise-impermeable endodermal barrier. Here we demonstrate that these passage cells are late emanations of a meri

SUBMITTER: Andersen TG 

PROVIDER: S-EPMC6054302 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature