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以添加了不同浓度铅的1/4Hoagland营养液为介质,对观赏植物白雪姬(Tradescantia sillamontana)进行人工模拟铅胁迫实验,探讨了白雪姬的铅富集性和铅胁迫下其生长、生理的变化.结果显示,在0～1500mg.L-1铅浓度范围,白雪姬地上部铅含量持续增长(p<0.05),根部铅含量先在500mg.L-1处有较高值,在1000mg.L-1处含量反而有所下降,二者的最大值均出现在1500mg.L-1铅浓度下,含量超过了1000mg.kg-1;铅胁迫实验中,所有白雪姬植株在500～1500mg.L-1铅浓度范围未出现死亡,表现出极高的耐铅性;其叶绿素含量、细胞膜透性、MDA含量、Pro值、POD活性和NR活性变化趋势与已见报道的铅富集植物的变化趋势相似.由此得出,观赏植物白雪姬可以用于铅污染的植物修复和配植于有铅污染的区域.
The experiment was conducted on artificial simulated lead stress of Tradescantia sillamontana with 1 / 4Hoagland nutrient solution supplemented with different concentrations of lead. The Pb-richness and the physiological and biochemical changes of Baiseji The results showed that in the range of 0 ~ 1500mg.L-1 lead, the content of lead in the upper part of white snow persimmon continued to increase (p <0.05), the content of lead in root was higher at 500mg.L-1, -1 at the level of content but declined, the maximum of the two were present in the lead concentration of 1500mg.L-1, the content exceeds 1000mg.kg-1; lead stress experiments, all the white snow Kyrgyz plant in the 500 ~ 1500mg.L -1 did not appear to die in the lead concentration range, and showed extremely high tolerance to lead. The change trend of chlorophyll content, membrane permeability, MDA content, Pro value, POD activity and NR activity had no correlation with the reported changes of Pb-rich plants The trend is similar, which shows that the ornamental plant Serena can be used for the phytoremediation of lead contamination and for planting in areas contaminated with lead.