DETOXICATION OF ASCORBIC ACID AND MOLYSITE ON THE ROOT GROWTH OF GARLIC UNDER CADMIUM POLLUTION

The effects of cadmium solutions of different concentration (100-400 mg/L) on root of garlic were studied.After 24, 48 h of treatment,obvious morphological and cytological changes were observed.With the increase of cadmium concentration or treatment time, the rate of root growth decreased successively or stopped, the mitosis index of root tip cells reduced, the number of anomalous dividing cells rose.The main type of chromosomal aberrations were C-mitosis, chromosome bridge in lower toxicity; fragment, stickiness, fluidization of chromosomes, micronuclei and disintegration of nuclei in higher toxicity.After the roots were toxicated in cadmium solution for 48 h,recovery culture with ascorbic acid, molysite and tap water alleviated the above symptom of toxcity significantly.The rate of root growth and mitosis index were increased.The number of anomalous dividing cells were decreased.The results showed the ascorbic acid and molysite possessed definite detoxication.