Chen Fu, Aqeel Muhammad, Khalid Noreen, Nazir Atia, Irshad Muhammad Kashif, Akbar Muhammad Usman, Alzuaibr Fahad Mohammed, Ma Jing, Noman Ali
School of Public Administration, Hohai University, Nanjing 210098, PR China.
State Key Laboratory of Grassland Agro-ecosystems, College of Ecology, Lanzhou University, Lanzhou 730000. Gansu, PR China.
J Hazard Mater. 2023 May 5;449:130966. doi: 10.1016/j.jhazmat.2023.130966. Epub 2023 Feb 8.
Interaction of different pollutants can aggravate hazards to biotic components in agroecosystems. Microplastics (MPs) are especially needed to be focused on because of their increasing use in life around the globe. We investigated the interactive impacts of polystyrene microplastics (PS-MP) and lead (Pb) on mung bean (Vigna radiata L.). Toxicity of MPs and Pb directly impeded V. radiata attributes. In combination i.e., M2P2 (40 µM Pb + 4.0 mg L-1 MPs) predominantly reduced the shoot root fresh and dry weights. \ Pb and PS-MP impaired the Rubisco activity and chlorophyll contents. The dose dependent relationship (M2P2) discomposed indole 3-acetic acid by 59.02%. Individual treatments P2 (40 µM Pb) and M2 (4.0 mg L MPs) respectively instigated a decline (44.07% and 27.12%) in IBA, while ABA was elevated. M2 significantly enhanced the contents of Alanine (Ala), Arginine (Arg), Proline (Pro), and glycine (Gly) by 64.11%, 63%, and 54% compared to control. Lysine (Lys) and Valine (Val) presented a converse relationship with other amino acids. Except for control, a gradual decline in yield parameters were observed in individual and combined applications of PS-MP. Proximate composition of carbohydrates, lipids and proteins also reflected a clear decrease in these compounds after combined application of Pb and MPs. Although, individual doses caused a decline in these compounds but effect of combined doses Pb and PS-MP was highly significant. Our results demonstrated the toxicity effect of Pb and MP in V. radiata attributes that is mainly linked with cumulative physiological and metabolic perturbations. These collective negative impacts of different doses of MPs and Pb on V. radiata would certainly pose serious implications for humans.
不同污染物之间的相互作用会加剧对农业生态系统中生物成分的危害。由于微塑料在全球生活中的使用量不断增加，尤其需要对其予以关注。我们研究了聚苯乙烯微塑料（PS-MP）和铅（Pb）对绿豆（Vigna radiata L.）的交互影响。微塑料和铅的毒性直接影响了绿豆的各项特性。两者共同作用时，即M2P2（40 μM铅 + 4.0 mg L-1微塑料）主要降低了地上部和根部的鲜重与干重。铅和聚苯乙烯微塑料损害了核酮糖-1,5-二磷酸羧化酶活性和叶绿素含量。剂量依赖关系（M2P2）使吲哚-3-乙酸分解了59.02%。单独处理时，P2（40 μM铅）和M2（4.0 mg L微塑料）分别使吲哚-3-丁酸下降了44.07%和27.12%，而脱落酸含量升高。与对照相比，M2显著提高了丙氨酸（Ala）、精氨酸（Arg）、脯氨酸（Pro）和甘氨酸（Gly）的含量，分别提高了64.11%、63%和54%。赖氨酸（Lys）和缬氨酸（Val）与其他氨基酸呈现相反的关系。除对照外，在聚苯乙烯微塑料单独及联合施用时，产量参数均呈现逐渐下降的趋势。碳水化合物、脂质和蛋白质的近似组成也表明，铅和微塑料联合施用后，这些化合物明显减少。虽然单独剂量会导致这些化合物减少，但铅和聚苯乙烯微塑料联合剂量的影响非常显著。我们的结果表明，铅和微塑料对绿豆特性具有毒性作用，这主要与累积的生理和代谢紊乱有关。不同剂量的微塑料和铅对绿豆的这些共同负面影响肯定会对人类造成严重影响。
