Effects of Cr6+on Physiological Characteristics of Three Species of Corns
To study the toxicity effect of Cr and the long-term chromic slag dumps' impact on the surrounding ecological environment and the present status for chromic slag pollution. Three different kinds of maize seeds (Zhengdan 958, Qiangsheng 31, Nongda 108) were divided into the controls, 1×10-4, 5×10-4, 1×10-3 mol·L-1, 5×10-3, 1×10-2 mol·L-1 Cr6+ to determine the toxicity effect to the maize. The seeds were routine cultured in the laboratory, then the plant height, root height, plant dry weight, wet weight, the chlorophyll content and the changes of the activity of superoxide dismutase (SOD), peroxidase (POD) and malondialdehyde (MDA) were measured. The results shown that compared with the controls, the plant height, root height, plant dry weight and wet weight decreased respectively in dose-effect manner following the rising Cr6+. The change tendency showed significant differences (P<0.05) with 1×10-4 mol·L-1 Cr6+. As the content of Cr6+ increased, the chlorophyll content was decerased and the activities of dismutase (SOD), peroxidase (POD) and malondialdehyde (MDA) were gradually increased. The statistically significant differences (P<0.05) were observed at each dose of experimental group. The Cr6+could cause toxicity effect of maize seeds and do harm for the growth of the maize.
国家科技期刊平台
NSTL
万方数据
维普
