The chelator EDTA (ethylenediaminetet-raacetic acid) was used by itself and in combination with CaCl2.We also used ancymidol, i.e. -cyclopropyl--(methoxyphenyl)-5-pyrimidine methanol (by itself or in Reducymol; Elanco, Brussels,Belgium), which is an inhibitor of gibberellin biosynthesis.The range of concentrations used is given in the text and/or