title: Ethylene perception generates gravicompetence in gravi-incompetent leaves of rye seedlings.
abstract: The elongating leaves of young rye seedlings do not show a gravitropic response when placed horizontally. However, after treatment with ethylene, either supplied exogenously via ethephon or by application of its precursor 1-aminocyclopropane-1-carboxylic acid (ACC), gravicompetence is seen. The inhibition of ethylene perception by 1-methylcyclopropene (MCP) prevents gravicompetence. Young rye leaves provide a useful model system in which to identify the components of the gravity sensing or response systems, the presence of which govern gravicompetence.
authors.affiliation: Botanisches Institut der Universität Bonn, Abteilung Molekularbiologie, Kirschallee 1, D-53115 Bonn, Germany. edelmann@uni-bonn.de
authors.forename: Hans G
authors.initials: HG
authors.lastname: Edelmann
mesh_terms: D000598:Amino Acids, Cyclic / Q000494:pharmacology; D018548:Cotyledon / Q000187:drug effects / Q000254:growth & development*; D003521:Cyclopropanes / Q000494:pharmacology; D005030:Ethylenes / Q000037:antagonists & inhibitors / Q000494:pharmacology*; D018522:Gravitropism / Q000187:drug effects / Q000502:physiology*; D009943:Organophosphorus Compounds / Q000494:pharmacology; D010937:Plant Growth Regulators / Q000494:pharmacology; D018515:Plant Leaves / Q000187:drug effects / Q000254:growth & development*; D012434:Secale / Q000187:drug effects / Q000254:growth & development*; D015398:Signal Transduction / Q000187:drug effects / Q000502:physiology
chemical_list: D000598:Amino Acids, Cyclic; D003521:Cyclopropanes; D005030:Ethylenes; D009943:Organophosphorus Compounds; D010937:Plant Growth Regulators; C023863:1-aminocyclopropane-1-carboxylic acid; C036216:ethylene; C412563:1-methylcyclopropene; C005073:ethephon