Ethylene and auxin-induced cell growth in relation to auxin transport and metabolism and ethylene production in the semi-aquatic plant, Regnellidium diphyllum

摘要: Cell elongation in the rachis of semiaquatic fern Regnellidium diphyllum is induced by addition ethylene or indoleacetic acid (IAA). Experiments with whole plants segments have shown that ethylene-induced growth requires presence auxin. Ethylene does not cause a modification either endogenous auxin levels extent metabolism but transport reduced. Rates production are altered mechanical excitation A two-hormone control cell expansion proposed which an initial, auxin-dependent event pre-conditions cells to further subsequent (or synchronous) ethylene-dependent event.