铜镉污染对海州香薷种子萌发的影响

Effects of Copper and Cadmium Pollution on Elsholtzia Splendens Seed Germination

摘要: 以海州香薷种子为试材,研究了铜镉污染对种子萌发的影响.结果表明,在实验所选的胁迫浓度范围内,单一铜污染时,海州香薷种子发芽率随着Cu2+浓度的升高,先升后降,在20mg/LCu2+处理时出现了毒性兴奋效应现象.铜镉污染对海州香薷幼苗苗长和根长的抑制作用极显著.根据综合效应指标,铜镉复合污染对海州香薷种子萌发的影响表现形式为铜、镉的协同作用.

Abstract: The effects of the copper and cadmium contamination on Elsholtzia Splendens was studied in this paper.The results showed that seed germination rate first rose and then dropped with the concentration of Cu²⁺ increasing,and the maximum germination rate appeared in the 20mg/L Cu²⁺ concentration.However,the prolongation of root and the seedling heights were restrained obviously under the copper and cadmium stress.According to the combined effect of indicators,there was synergy between copper and cadmium under compound condition.