Multidisciplinary Institute of Plant Biology, Pollution and Bioindicator Section, Faculty of Physical and Natural Sciences, National University of Córdoba, Córdoba, Argentina.
J Hazard Mater. 2012 Sep 30;233-234:244-53. doi: 10.1016/j.jhazmat.2012.07.026. Epub 2012 Jul 20.
Argentina is one of the major producers of soybean in the world, this generates a high global demand for this crop leading to find it everywhere, even close to human activities involving pollutant emissions. This study evaluated heavy metal content, the transfer of metals and its relation to crop quality, and the toxicological risk of seed consumption, through soil and soybean sampling. The results show that concentrations of Pb and Cd in soils and soybeans at several sites were above the maximum permissible levels. The heavy metal bioaccumulation depending on the rhizosphere soil compartment showed significant and high regression coefficients. In addition, the similar behavior of Cd and Zn accumulation by plants reinforces the theory of other studies indicating that these metals are incorporated into the plant for a common system of transport. On the other hand, the seed quality parameters did not show a clear pattern of response to metal bioacumulation. Taken together, our results show that soybeans grown nearby to anthropic emission sources might represent a toxicological hazard for human consumption in a potential Chinese consumer. Hence, further studies should be carried out taking into account the potential negative health effects from the consumption of soybeans (direct or indirect through consumption of meat from cattle) in these conditions.
阿根廷是世界上主要的大豆生产国之一，这导致全球对这种作物的需求很高，以至于在任何地方都能找到它，甚至在靠近涉及污染物排放的人类活动的地方。本研究通过土壤和大豆采样，评估了重金属含量、金属的迁移及其与作物质量的关系，以及种子食用的毒理学风险。结果表明，在多个地点，土壤和大豆中的 Pb 和 Cd 浓度均高于最大允许水平。重金属的生物积累取决于根际土壤隔室，表现出显著且高的回归系数。此外，植物对 Cd 和 Zn 积累的相似行为强化了其他研究的理论，表明这些金属被植物吸收到一个共同的运输系统中。另一方面，种子质量参数对金属生物积累没有表现出明显的响应模式。总之，我们的研究结果表明，在人为排放源附近种植的大豆可能对中国潜在消费者的食用构成毒理学危害。因此，在这些情况下，应该进一步开展研究，以考虑到食用大豆（直接或间接通过食用来自牛的肉）可能产生的潜在负面健康影响。
