| To evaluate the morphological and physiological index variations between seedlings exhibiting sensitive and resistant capabilities to nicosulfuron, near-isogenic lines of waxy corns, shennuo 509R and shennuo 509S, were employed for analyses using hydroponic method with the addition of nicosulfuron. The results indicated that these two near-isogenic lines both were significantly different from the control. All responding indexes became intensified with the increase of nicosulfuron concentrations. The resistant line did not have a clear reaction to 0.02 mL·L-1 nicosulfuron, whereas the sensitive line showed a strong response, which became even dead. The sensitive and resistant lines were found to display significant variations in sensitivities and levels to nicosulfuron. In conclusion, the utilization of hydroponic method with 0.02 mL·L-1 nicosulfuron provided an accurate evaluation of inbred lines in responses to nicosulfuron on the basis of their morphological and physiological indexes. |