Water Science and Environmental Engineering Research Center, College of Chemical and Environmental Engineering, Shenzhen University, Shenzhen 518060, China; Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Water Science and Environmental Engineering Research Center, College of Chemical and Environmental Engineering, Shenzhen University, Shenzhen 518060, China.
Sci Total Environ. 2023 Dec 15;904:166677. doi: 10.1016/j.scitotenv.2023.166677. Epub 2023 Sep 1.
The environmental issue of lead (Pb), cadmium (Cd), and tetracycline (TC) contamination in cereal crops has become a growing concern worldwide. An in-depth understanding of this issue would be of importance to promote effective management strategies for heavy metals and antibiotics worldwide. The present study was conducted to assess the toxic effects of heavy metals (Cd, Pb) and antibiotics (TC) on Triticum aestivum (T. aestivum, common wheat) based on studies conducted in the past 22 years. Data pertaining to the growth and development of T. aestivum were extracted and analyzed from 89 publications spanning from 2000 to 2022. Our results showed that Pb, Cd and TC significantly reduced growth and development by 11 %, 9 %, and 5 %, respectively. Additionally, significant accumulation of Cd (42 %) and Pb (17 %) was observed in T. aestivum samples, although there was little change in TC accumulation, which showed limited absorption, accumulation, and translocation of TC in wheat plants. Pb had the greatest impact on the yield of T. aestivum, followed by Cd, while TC had no apparent effect. Furthermore, exposure to Cd, Pb and TC reduced the photosynthetic rate due to chlorophyll reduction, with Cd having the most pronounced effect (58 %), followed by Pb (37 %) and TC (8 %). Cd exposure also significantly enhanced gaseous exchange (37 %) compared to TC and Pb, which reduced gaseous exchange by 4 % and 10 %, respectively. However, the treatments with TC (>50-100 mgL), Pb (>1000-2000 mg L) and Cd (>500-1000 mg L) increased the defense system of T. aestivum samples by 38 %, 15 %, and 11 %, respectively. The obtained findings have significant implications for risk assessment, pollution prevention, and remediation strategies to address soil contamination from Pb, Cd and TC in farmland.
粮食作物中铅（Pb）、镉（Cd）和四环素（TC）污染的环境问题已成为全球关注的焦点。深入了解这一问题对于在全球范围内推行有效的重金属和抗生素管理策略至关重要。本研究基于过去 22 年的研究，评估了重金属（Cd、Pb）和抗生素（TC）对冬小麦（Triticum aestivum，普通小麦）的毒性影响。从 2000 年至 2022 年期间的 89 篇文献中提取并分析了与 T. aestivum 生长和发育相关的数据。结果表明，Pb、Cd 和 TC 分别显著降低了 11%、9%和 5%的生长和发育。此外，在 T. aestivum 样本中观察到 Cd（42%）和 Pb（17%）的显著积累，而 TC 积累变化不大，表明 TC 在小麦植株中吸收、积累和转运有限。Pb 对 T. aestivum 产量的影响最大，其次是 Cd，而 TC 则没有明显影响。此外，由于叶绿素减少，Cd、Pb 和 TC 暴露会降低光合作用速率，其中 Cd 的影响最为显著（58%），其次是 Pb（37%）和 TC（8%）。Cd 暴露还显著增强了气态交换（37%），而 TC 和 Pb 则分别降低了 4%和 10%的气态交换。然而，TC（>50-100mgL）、Pb（>1000-2000mgL）和 Cd（>500-1000mgL）处理分别使 T. aestivum 样本的防御系统增加了 38%、15%和 11%。这些发现对于风险评估、污染预防和修复策略具有重要意义，可用于解决农田中 Pb、Cd 和 TC 污染对土壤的影响。
