Effects of polyester microplastics and naproxen on lettuce growth and development and soil abiotic factors

IF 1.3 Q3 AGRONOMY Agrosystems, Geosciences & Environment Pub Date : 2024-09-25 DOI:10.1002/agg2.20561
Andy Chen, Pamela Jane Victoria A. Barroso, Jennifer Tran, Ashley K. Gance, Miranda A. Kearney
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Abstract

Microplastics (MPs), formed from the physical breakdown of larger plastics, have been found across a variety of ecosystems. Much research has been done on the effects of MPs in aquatic ecosystems, but fewer studies have explored their effects in terrestrial environments, particularly in agroecosystems where modern practices contribute strongly to MP soil pollution (e.g., plasticulture, fertilization with contaminated biosolids, and composts). Aquatic pharmaceutical contamination is also considered an emerging pollutant threat. Naproxen, a commonly used drug, has been found in wastewater and natural freshwater bodies globally. Thus, crops may be exposed to multiple pollutants simultaneously through soil and water inputs. Our research provides insight into the individual and interactive effects of soil MP pollution intensity and exposure to naproxen-contaminated water on growth and development of Lactuca sativa (lettuce). Soil abiotic factors (pH, electrical conductivity, and rates of soil moisture loss) are also reported. We found that 7% polyester MP-contaminated soil significantly reduced total aboveground biomass and coarse root biomass, while both 0.03% and 7% polyester MP-contaminated soil significantly reduced leaf count and average leaf size. However, 1 mg/L naproxen had no effect on plant growth or development, and there were no interactive effects of naproxen with MPs. MPs also significantly increased rates of soil moisture loss, but we found no effects of MPs or naproxen on soil pH or electrical conductivity. Predicted global increases in soil MP contamination levels will potentially have negative consequences for food systems.

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聚酯微塑料和萘普生对莴苣生长发育和土壤非生物因素的影响
微塑料(MPs)是大型塑料物理分解后形成的,在各种生态系统中都有发现。有关 MPs 对水生生态系统影响的研究很多,但探讨其对陆地环境影响的研究较少,尤其是在农业生态系统中,因为在农业生态系统中,现代做法(如塑料栽培、用受污染的生物固体和堆肥施肥)对 MPs 造成了严重的土壤污染。水生药物污染也被认为是一种新出现的污染物威胁。萘普生是一种常用药物,已在全球废水和天然淡水水体中发现。因此,农作物可能会通过土壤和水的输入同时接触到多种污染物。我们的研究深入探讨了土壤 MP 污染强度和接触萘普生污染水对莴苣(Lactuca sativa)生长发育的单独和交互影响。同时还报告了土壤非生物因素(pH 值、导电率和土壤水分流失率)。我们发现,7% 的聚酯 MP 污染土壤会显著降低地上生物总量和粗根生物量,而 0.03% 和 7% 的聚酯 MP 污染土壤会显著降低叶片数量和平均叶片大小。不过,1 毫克/升的萘普生对植物的生长和发育没有影响,而且萘普生与 MPs 之间也没有交互作用。多溴联苯醚还会明显增加土壤水分流失率,但我们没有发现多溴联苯醚或萘普生对土壤 pH 值或导电率有任何影响。预计全球土壤中 MP 污染水平的增加将对粮食系统产生潜在的负面影响。
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来源期刊
Agrosystems, Geosciences & Environment
Agrosystems, Geosciences & Environment Agricultural and Biological Sciences-Agricultural and Biological Sciences (miscellaneous)
CiteScore
2.60
自引率
0.00%
发文量
80
审稿时长
24 weeks
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