Ethylene and auxin-induced cell growth in relation to auxin transport and metabolism and ethylene production in the semi-aquatic plant,Regnellidium diphyllum |
| |
| Authors: | John Walters Daphne J Osborne |
| |
| Institution: | (1) Agricultural Research Council, W.R.O. Developmental Botany, 181A Huntingdon Road, CB3 ODY Cambridge, U.K.;(2) Present address: Department of Insectides and Fungicides, Rothamsted Research Station, Harpenden, Herts, U.K.;(3) Present address: Developmental Botany, Weed Research Organization, Begbroke Hill, OX5, IPF Oxford, U.K. |
| |
| Abstract: | Cell elongation in the rachis of the semiaquatic fern Regnellidium diphyllum is induced by the addition of ethylene or indoleacetic acid (IAA). Experiments with whole plants or rachis segments have shown that ethylene-induced growth requires the presence of auxin. Ethylene does not cause a modification in either endogenous auxin levels or in the extent of auxin metabolism but auxin transport is reduced. Rates of ethylene production in Regnellidium are not altered by either mechanical excitation or by the addition of auxin. A two-hormone control of cell expansion is proposed in which an initial, auxin-dependent growth event pre-conditions the cells to a further subsequent (or synchronous) ethylene-dependent growth event.Abbreviation IAA
indole-3yl-acetic acid |
| |
| Keywords: | Auxin Cell elongation Ethylene Mechanical excitation Regnellidium Transport |
| 本文献已被 SpringerLink 等数据库收录！ |
|
