Coupled ultradian growth and curvature oscillations during gravitropic movement in disturbed wheat coleoptiles.

ABSTRACT: To grow straight and upright, plants need to regulate actively their posture. Gravitropic movement, which occurs when plants modify their growth and curvature to orient their aerial organ against the force of gravity, is a major feature of this postural control. A recent model has shown that graviception and proprioception are sufficient to account for the gravitropic movement and subsequent organ posture demonstrated by a range of species. However, some plants, including wheat coleoptiles, exhibit a stronger regulation of posture than predicted by the model. Here, we performed an extensive kinematics study on wheat coleoptiles during a gravitropic perturbation (tilting) experiment in order to better understand this unexpectedly strong regulation. Close temporal observations of the data re

SUBMITTER: Bastien R 

PROVIDER: S-EPMC5875799 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature