CALCIUM AND CALMODULIN INHIBITOR EFFECTS ON THE GROWTH OF CARROT (DAUCUS CAROTA L) AND RADISH (RAPHANUS SATIVUS L) IN NUTRIENT CULTURE

摘要

Growth of carrot and radish seedlings in nutrient culture was inhibited by pretreatment with three calmodulin inhibitors. There was little selective effect on specific organs, shoots, tap root and fibrous roots over a range of concentrations. Although pretreatment with CaCl2 (0.5 mM) did not affect growth of untreated seedlings, it partially reduced the inhibitory effects of trifluoperazine over the concentration range 0.01-0.05 mM. Trifluoperazine reduced the growth of GA(3)-treated seedlings but did not overcome the modifying effect of GA(3) in favouring shoot/root ratio; ABA exacerbated its inhibitory effect on overall seedling growth and particularly on tap root development. [References: 20]