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首页> 外文期刊>BioMetals: An International Journal on the Role of Metal Ions in Biology, Biochemistry and Medicine >Preliminary study of Lead (Pb) immobilization by meat and bone meal combustion residues (MBMCR) in soil: Assessment of Pb toxicity (phytotoxicity and genotoxicity) using the tobacco model (Nicotiana tabacum var. xanthi Dulieu)
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Preliminary study of Lead (Pb) immobilization by meat and bone meal combustion residues (MBMCR) in soil: Assessment of Pb toxicity (phytotoxicity and genotoxicity) using the tobacco model (Nicotiana tabacum var. xanthi Dulieu)

机译：肉和骨粉燃烧残留物（MBMCR）在土壤中固定铅（Pb）的初步研究：使用烟草模型（Nicotiana tabacum var。xanthi Dulieu）评估Pb毒性（植物毒性和遗传毒性）

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摘要

Lead (Pb) is a major chemical pollutant in the environment. The present investigation evaluates the possible use of Meat and Bone Meal Combustion Residues (MBMCR), to sequester Pb from the soil compartment using the heterozygous tobacco model (Nicotiana tabacum var. xanthi Dulieu) characterized by the a(1)(+)/a(1) a(2)(+)/a(2) system. The toxic potential of Pb-contaminations (50, 100, 1,000, 2,000 and 10,000 mg Pb kg(-1)) as Pb(NO3) in standard soil was investigated in lab conditions according to three endpoints: (i) acute toxicity of plants (mortality, height and surface area parameters), (ii) Pb-accumulation in roots, stems and leaves, and (iii) genetic effects as the expression of reversion in the leaf of plants. Moreover, chemical investigations of Pb interactions with soil were realized to complete the toxicity evaluation. The results demonstrated that: (i) MBMCR were not acutely toxic or genotoxic to tobacco plants, (ii) Pb is acutely toxic to tobacco plants at 10,000 mg Pb kg(-1) of soil, (ii) but is not genotoxic, and (iii) Pb-bioaccumulation is significant in leaves, stems and roots (from 1,000, 2,000, and 50 mg Pb kg(-1) of soil, respectively). In contrast, in the presence of MBMCR, the toxic impacts of Pb were inhibited and Pb-accumulation in tobacco plants was reduced. In complement, chemical analyses highlighted the high capacity of the standard soil to immobilize Pb. The results suggest that even if Pb is bioavailable from soils to plants, complex mechanisms could occur in plants protecting them from the toxic impact of Pb.
机译：铅（Pb）是环境中的主要化学污染物。本研究评估了使用杂合烟草模型（Nicotiana tabacum var。xanthi Dulieu）以a（1）（+）/ a为特征的肉骨粉燃烧残留物（MBMCR）从土壤隔室中隔离铅的可能性。 （1）a（2）（+）/ a（2）系统。在实验室条件下，根据以下三个方面对标准土壤中Pb污染（50、100、1,000、2,000和10,000 mg Pb kg（-1））作为Pb（NO3）的潜在毒性进行了研究：（i）植物的急性毒性（死亡率，高度和表面积参数），（ii）根，茎和叶中的Pb积累，以及（iii）遗传效应，即植物叶片中回复的表达。此外，对铅与土壤的相互作用进行了化学研究，以完成毒性评估。结果表明：（i）MBMCR对烟草植物无急性毒性或遗传毒性;（ii）在10,000 mg Pb kg（-1）的土壤中，Pb对烟草植物具有急性毒性;（ii）但无遗传毒性;以及（iii）铅在叶片，茎和根中的生物蓄积能力显着（分别来自1,000、2,000和50 mg Pb kg（-1）的土壤）。相反，在存在MBMCR的情况下，抑制了Pb的毒性作用，并减少了烟草植物中Pb的积累。作为补充，化学分析突出了标准土壤固定铅的高能力。结果表明，即使从土壤到植物都可利用铅，植物中仍可能出现复杂的机制，保护铅免受铅的毒性影响。

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