title: Induction of hydrotropism in clinorotated seedling roots of Alaska pea, Pisum sativum L.
abstract: Roots of the agravitropic pea (Pisum sativum L.) mutant ageotropum show positive hydrotopism, whereas roots of Alaska peas are hydrotropically almost non-responsive.  When the gravitropic response was nullified by rotation on clinostats, however, roots of Alaska peas showed unequivocal positive hydrotropism in response to a water potential gradient.  These results suggest that roots of Alaska peas possess normal ability to respond hydrotropicallly and their weak hydrotropic response results from a counteracting effect of gravitropism.
authors.affiliation: Institute of Genetic Ecology, Tohoku University, Sendai, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Takahashi
authors.forename: M
authors.initials: M
authors.lastname: Takano
authors.forename: N
authors.initials: N
authors.lastname: Fujii
authors.forename: M
authors.initials: M
authors.lastname: Yamashita
authors.forename: H
authors.initials: H
authors.lastname: Suge
mesh_terms: D006112:Gravitation; D018522:Gravitropism / Q000502:physiology*; D009154:Mutation; D018532:Pisum sativum / Q000235:genetics / Q000254:growth & development / Q000502:physiology*; D018517:Plant Roots / Q000254:growth & development* / Q000502:physiology; D012399:Rotation; D018523:Tropism / Q000502:physiology*; D014867:Water; D018474:Weightlessness Simulation
chemical_list: D014867:Water