Rapid translocation of NGR proteins driving polarization of PIN-activating D6 protein kinase during root gravitropism.

ABSTRACT: Root gravitropic bending represents a fundamental aspect of terrestrial plant physiology. Gravity is perceived by sedimentation of starch-rich plastids (statoliths) to the bottom of the central root cap cells. Following gravity perception, intercellular auxin transport is redirected downwards leading to an asymmetric auxin accumulation at the lower root side causing inhibition of cell expansion, ultimately resulting in downwards bending. How gravity-induced statoliths repositioning is translated into asymmetric auxin distribution remains unclear despite PIN auxin efflux carriers and the Negative Gravitropic Response of roots (NGR) proteins polarize along statolith sedimentation, thus providing a plausible mechanism for auxin flow redirection. In this study, using a functional NGR1-GFP cons

SUBMITTER: Kulich I 

PROVIDER: S-EPMC10942638 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature