title: Springback and diagravitropism in Merit corn roots.
abstract: Dark-treated Merit corn (Zea mays L.) roots are diagravitropic and lose curvature upon withdrawal of the gravity stimulus (springback).  Springback was not detected in a variety of corn that is orthogravitropic in the dark, nor in Merit roots in which tropistic response was enhanced either with red light or with abscisic acid.  A possible interpretation is that springback may be associated with a weak growth response of diagravitropic roots.
authors.affiliation: Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, New York 14853.
authors.forename: M O
authors.initials: MO
authors.lastname: Kelly
authors.forename: A C
authors.initials: AC
authors.lastname: Leopold
mesh_terms: D000040:Abscisic Acid / Q000494:pharmacology; D003624:Darkness; D006112:Gravitation; D018522:Gravitropism / Q000187:drug effects / Q000502:physiology* / Q000528:radiation effects; D008027:Light; D018517:Plant Roots / Q000187:drug effects / Q000254:growth & development* / Q000502:physiology; D012399:Rotation; D013997:Time Factors; D003313:Zea mays / Q000187:drug effects / Q000254:growth & development* / Q000502:physiology
chemical_list: D000040:Abscisic Acid