EFFECT OF TREATING THE SEEDS AND SEEDLINGS WITH CHILLING AND DIETHYL SULPHATE ON THE GROWTH AND FLOWERING OF ANTIRRHINUM MA JUS

摘要

Seeds and seedlings of Antirrhinum majus cv. Snow/lake were chilled (4 and -20°C for seeds and 4X1for seedlings) or treated with different concentrations of the chemical mutagen diethyl sulphate (DES) (0.3, 0.6 and 0.9%) and then the treatments weretransplanted in the plastic house and on the open field. The effect on the vegetative growth, flowering characters and induction of variations was assessed in three generations. In general, the decrease in plant height and inflorescence length was correlated with increasing the concentrations of DES and decreasing the temperature or the period of exposure to chilling. The variations included dwarfplant and leaf andfloret changes.