Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session Y03: Plant Physics
8:00 AM–11:00 AM,
Friday, March 18, 2022
Room: McCormick Place W-176A
Sponsoring Units: DBIO GSNP
Chair: Yasmine Meroz, Tel Aviv University
Abstract: Y03.00014 : Root growth response to rigid obstacles.
10:36 AM–10:48 AM
(Université Paris Diderot)
To mimic such a system, maize seedlings were grown inside a soft gel (agarose gel 2% w/w) placed above a force sensor acting as an obstacle. The root was guided through a vertical cylindrical hole pre-formed inside the gel. The whole setup was illuminated with Infra-Red lighting, to perform time-lapse imaging of the root growth as well as detailed kinematic studies of the root growth zone through a PIV technique. Growth observation was coupled with force measurements when the root tip emerged from the gel and pushed against the force sensor.
Force-velocity relationships and strain rate profiles along the root axis were established to test the validity of Lockhart-type growth models under mechanical stress.
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