Phytostabilization Potential of Jatropha Curcas L. in Polymetallic Acid Mine Tailings
Phytostabilization Potential of Jatropha Curcas L. in Polymetallic Acid Mine Tailings
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DOI：
10.1080/15226514.2010.525562
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发表时间：
2011-05
影响因子：
3.7
通讯作者：
Qihang Wu;Shizhong Wang;P. Thangavel;Qingfei Li;Handou Zheng;Jun Bai;R. Qiu
中科院分区：
文献类型：
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作者：
Qihang Wu;Shizhong Wang;P. Thangavel;Qingfei Li;Handou Zheng;Jun Bai;R. Qiu
通过温室盆栽试验，研究了小桐子对重金属胁迫的生长反应、耐重金属能力和植物稳定性。植物生长在不同程度的多金属污染的酸性矿山土壤（T0，控制; T1，中度和T2，高度污染的土壤）与石灰石或无修正案。小桐子对重金属的积累顺序为根>茎>叶。T1代植株的耐受指数大于90%，且无药害症状，植株生长减缓，表明该植株对多金属酸尾矿具有耐受能力。此外，各种酶和非酶抗氧化剂也积极参与了金属防御机制在麻疯树。另一方面，以减轻主要植物有效的有毒金属，如铝，铜，铅，不同的利率（0.1%，0.25%，0.50%和1%）的石灰石修正案被添加到T1和T2土壤。在石灰添加量为0.50%时，土壤pH值升高，植物有效性土壤Al（95%）、Zn（1075%）和Cu（1065%）含量降低，促进了麻疯树的生长。基于小桐子在现有不利环境条件下的内在耐受能力，其可以用作酸性尾矿的植物稳定化的合适候选者。
Greenhouse pot experiments were conducted to determine the growth response, metal tolerance, and phytostabilization potential of Jatropha curcas L. The plants were grown on different degrees of multi-metal contaminated acid mine soils (T0, control; T1, moderately and T2, highly contaminated soils) with or without limestone amendments. The order of metal accumulation in J. curcas was roots>stems>leaves. The higher tolerance index (>90%) with no phytotoxic symptoms and growth reduction in T1 showed that this plant has the ability to tolerate polymetallic acid mine tailings. Further, various enzymatic and non-enzymatic antioxidants also actively involved in metal defense mechanism in J. curcas. On the other hand, to alleviate the predominant phytoavailable toxic metals such as Al, Cu, and Pb, different rates (0.1, 0.25, 0.50, and 1%) of limestone amendments were added in both T1 and T2 soils. The growth performance of J. curcas was improved due to the increase in soil pH and decrease in phytoavailable soil Al (95%), Zn (∼75%), and Cu (∼65%) contents at 0.50% of lime addition. Based on the inherent tolerance ability of J. curcas in existing adverse environmental conditions without liming, it could be used as a suitable candidate for phytostabilization in acid mine tailings.