Root gravitropism in response to a signal originating outside of the cap.
We have developed image analysis software linked to a rotating stage, allowing constraint of any user-selected region of a root at a prescribed angle during root gravitropism. This device allows the cap of a graviresponding root to reach vertical while maintaining a selected region within the elongation zone at a gravistimulated angle. Under these conditions gravitropic curvature of roots of Zea mays L. continues long after the root cap reaches vertical, indicating that a signal from outside of the cap can contribute to the curvature response.
Wolverton
Chris
C
Department of Plant Biology, The Ohio State University, 1735 Neil Ave., Columbus, OH 43210, USA. wolverton.7@osu.edu
Mullen
Jack L
JL
Ishikawa
Hideo
H
Evans
Michael L
ML
D018522:Gravitropism / Q000502:physiology*; D018466:Gravity Sensing / Q000502:physiology; D007091:Image Processing, Computer-Assisted / Q000379:methods; D018518:Plant Root Cap / Q000502:physiology; D018517:Plant Roots / Q000502:physiology*; D015398:Signal Transduction; D003313:Zea mays / Q000502:physiology*