title: Root gravitropism in response to a signal originating outside of the cap.
abstract: 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.
authors.affiliation: Department of Plant Biology, The Ohio State University, 1735 Neil Ave., Columbus, OH 43210, USA. wolverton.7@osu.edu
authors.forename: Chris
authors.initials: C
authors.lastname: Wolverton
authors.forename: Jack L
authors.initials: JL
authors.lastname: Mullen
authors.forename: Hideo
authors.initials: H
authors.lastname: Ishikawa
authors.forename: Michael L
authors.initials: ML
authors.lastname: Evans
mesh_terms: 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*