Ethylene perception generates gravicompetence in gravi-incompetent leaves of rye seedlings |
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Authors: | Edelmann Hans G |
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Institution: | Botanisches Institut der Universit?t Bonn, Abteilung Molekularbiologie, Kirschallee 1, D-53115 Bonn, Germany. edelmann@uni-bonn.de |
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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. |
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