Influence of Compound Heavy Metal Pollution on Three Kinds of Vegetables Growth Status and Physiological and Biochemical Characteristics

Abstract

Through pot experiment to research the influence of different concentrations of compound heavy metals pollution on Pakchoi, Brassica chinensis and Celery growth status and several physiological and biochemical indexes. The test results showed that: with the increasing of pollution concentration, the maximum leaf area, plant height, fresh weight of the overground part, catalase activity, vitamin C content and free proline content were not uniform in three kinds of vegetables. The Pakchoi plant height and leaf area were increased at first, then decreased in the trend, biomass declined; the maximum leaf area, plant height and overground parts of the fresh weight of celery are tending to decline; the Brassica chinensis except plant height erratic, maximum leaf area and fresh weight of the overground parts showed a gradual downward trend; the Proline content increased compared with the control group, and celery’s proline content increased when compound heavy metals concentration increased, but the proline content declined of Pakchoi and Brassica chinensis in high heavy metals concentrations. The vitamin C content were lower than the control group, and celery’s vitamin C decreased with the compound heavy metals concentration increased, there was significant difference between the treatments, but Pakchoi and Brassica chinensis did not show a strong regularity; catalase activity of Celery and Brassica chinensis is lower than the control, but it is strong in Pakchoi.