Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin, China.
Guangxi Key Laboratory of Landscape Resources Conservation and Sustainable Utilization in Lijiang River Basin, Guangxi Normal University, Guilin, China.
Int J Phytoremediation. 2023;25(4):524-537. doi: 10.1080/15226514.2022.2092059. Epub 2022 Jul 5.
A hydroponic method was conducted to test whether is tolerant to multiple HMs as well as to evaluate whether sodium silicate promotes plant growth and alleviates HM stress mainly by assessing biomass, HM accumulation characteristics and antioxidant enzyme activities (AEAs). Three soil extractions from an uncontaminated soil, a comparable lightly HM-contaminated soil (EnSE), and a comparable heavily HM-contaminated soil (ExSE) with or without 1 mM sodium silicate supplementation were used. showed no obvious symptoms when cultured in EnSE and ExSE, indicating that it was a multi-HM-tolerant species. The biomass and photosynthesis followed the order: UnSE > EnSE > ExSE, but the opposite order was found for HM concentration, AEAs, and malondialdehyde content. Silicate had no effects on the growth and HM bioaccumulation characteristics of cultured in UnSE but exhibited a novel role in decreasing HM uptake by 13.61-41.51% in EnSE and ExSE, respectively, corresponding upregulated AEAs, and reduced malondialdehyde contents, resulting in increased biomass and alleviating HM stress. The activities of peroxidase and superoxide dismutase were upregulated by an increase in soil extraction HM concentration and further upregulated by silicate supplementation, indicating that they were important mechanisms alleviating HM stress in .
采用水培法测试了 是否能耐受多种重金属，同时评估了硅酸钠是否主要通过评估生物量、重金属积累特性和抗氧化酶活性（AEAs）来促进植物生长和缓解重金属胁迫。使用了来自未污染土壤的三种土壤提取液、一种可比的轻度重金属污染土壤（EnSE）和一种可比的重度重金属污染土壤（ExSE），或添加或不添加 1mM 硅酸钠。当在 EnSE 和 ExSE 中培养时， 没有表现出明显的症状，表明它是一种多重金属耐受物种。生物量和光合作用的顺序为：UnSE > EnSE > ExSE，但重金属浓度、AEAs 和丙二醛含量的顺序相反。硅酸钠对在 UnSE 中培养的 的生长和重金属生物积累特性没有影响，但在 EnSE 和 ExSE 中分别表现出降低重金属吸收的新作用，分别降低了 13.61-41.51%的重金属吸收，相应地上调了 AEAs，并降低了丙二醛含量，从而增加了生物量并缓解了重金属胁迫。过氧化物酶和超氧化物歧化酶的活性随着土壤提取重金属浓度的增加而上调，并且通过硅酸钠的补充进一步上调，表明它们是缓解 中重金属胁迫的重要机制。
