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通过植物修复和生理响应来平衡受大理石污染生态系统中元素的有害水平,以实现自然植被的政治平衡。

Politics of the natural vegetation to balance the hazardous level of elements in marble polluted ecosystem through phytoremediation and physiological responses.

机构信息

Department of Plant Sciences, Quaid-i-Azam University Islamabad, 45320, Pakistan.

School of Geography, Geology & the Environment, University of Leicester, UK.

出版信息

J Hazard Mater. 2021 Jul 15;414:125451. doi: 10.1016/j.jhazmat.2021.125451. Epub 2021 Feb 20.

Abstract

The current paper evaluates the phytoremediation ability and physiological responses of selected resistant plant species to the hazardous levels of elements in the marble waste polluted ecosystem. Preliminary results demonstrate that all the indicator/resistant plant species i.e., Ailanthus altissima, Arundo donax, Cynodon dactylon, Erigeron canadensis, Cannabis sativa, Ficus carica, Lathyrus aphaca, Morus alba, Populus alba, Robinia pseudoacacia and Vitex negundo were the best Phyto-extractors and Phyto-stabilizers for most of the heavy metals in general and Mg, Ca, Fe, Cu and Na in particular (at p < 0.05). Structural Equation Modeling confirmed that marble waste pollution has a direct and significant (R =0.80) impact on proline synthesis and hence a role in combating the pollution. Chlorophyll content decreased by 4% in studied plant species when the concentration of pollutants increased. It is concluded that the studied bio-indicators - the abundant plant species of the Marble Waste Polluted Systems (MWPS) have a significant role in its remediation. Increasing proline accumulation and decreasing chlorophyll contents with an increase in pollution in the studied plants show resilience of the ecosystem in response to the external lithospheric toxicities. It is recommended that the recognized plant species could be planted abundantly to remediate the MWPS around the marble processing and other such industries and their catchments.

摘要

本研究评估了选定抗性植物物种对大理石废料污染生态系统中有害元素的植物修复能力和生理响应。初步结果表明,所有指示/抗性植物物种,即臭椿、芦竹、狗牙根、加拿大飞蓬、大麻、桑树、野豌豆、白桑、白杨、刺槐和荆条,是大多数重金属的最佳植物提取剂和植物稳定剂,特别是 Mg、Ca、Fe、Cu 和 Na(p<0.05)。结构方程模型证实,大理石废料污染对脯氨酸合成有直接而显著的影响(R=0.80),因此在抵御污染方面发挥作用。当污染物浓度增加时,研究植物物种的叶绿素含量下降了 4%。研究得出结论,研究中的生物指示剂——大理石废料污染系统(MWPS)中丰富的植物物种在其修复中具有重要作用。研究植物中随着污染的增加脯氨酸积累的增加和叶绿素含量的降低表明生态系统对外部岩石圈毒性的弹性。建议在大理石加工和其他此类工业及其集水区周围大量种植这些公认的植物物种来修复 MWPS。

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