Department of Agricultural Chemistry, College of Agriculture, Life & Environment Sciences, Chungbuk National University, Cheongju, 28644, South Korea.
Department of Agricultural Chemistry, College of Agriculture, Life & Environment Sciences, Chungbuk National University, Cheongju, 28644, South Korea.
Chemosphere. 2023 Jul;329:138679. doi: 10.1016/j.chemosphere.2023.138679. Epub 2023 Apr 12.
Although microplastic (MP) pollution in farmland increased, the effect of MPs on plant growth was not clearly explained. Therefore, the object of the study was to evaluate the effect of polypropylene microplastics (PP-MPs) on plant germination, growth, and nutrient uptake under hydroponic conditions. The effect of PP-MPs on seed germination, shoot and root length, and nutrient uptake were assessed using tomato (Solanum lycopersicum L.) and cherry tomato (Solanum lycopersicum var. cerasiforme) seeds grown in half-strength Hoagland solution. The results showed that PP-MPs did not significantly affect seed germination, but positively affected the shoot and root elongation. In cherry tomato, the root elongation was significantly increased by 34%. Microplastics also affected nutrient uptake by plants, however, the effect varied depending on elements and plant species. The Cu concentration was substantially increased in tomato shoot while it decreased in cherry tomato root. Nitrogen uptake decreased in MP treated plants compared to the control and phosphorus uptake was significantly decreased in the shoot of cherry tomato. However, the root-to-shoot translocation rate of most macro nutrients decreased following exposure to PP-MPs indicating that long-term exposure to MPs may lead to a nutritional imbalance in plants.
尽管农田中的微塑料（MP）污染有所增加，但 MPs 对植物生长的影响尚不清楚。因此，本研究的目的是评估在水培条件下，聚丙烯微塑料（PP-MPs）对植物发芽、生长和养分吸收的影响。使用番茄（Solanum lycopersicum L.）和樱桃番茄（Solanum lycopersicum var. cerasiforme）种子在半强度 Hoagland 溶液中生长，评估 PP-MPs 对种子发芽、茎和根长以及养分吸收的影响。结果表明，PP-MPs 对种子发芽没有显著影响，但对茎和根伸长有积极影响。在樱桃番茄中，根伸长显著增加了 34%。微塑料还影响植物对养分的吸收，但影响因元素和植物种类而异。Cu 浓度在番茄茎中显著增加，而在樱桃番茄根中降低。与对照相比，MP 处理的植物氮吸收减少，而磷吸收在樱桃番茄的地上部显著减少。然而，暴露于 PP-MPs 后，大多数宏量营养素的根到茎的转运率下降，表明长期暴露于 MPs 可能导致植物营养失衡。
