Effects of Tire Wear Particle on growth, extracellular polymeric substance production and oxidation stress of algae Chlorella vulgaris: performance and mechanism

IF 4.1 2区环境科学与生态学 Q1 MARINE & FRESHWATER BIOLOGY

Aquatic Toxicology Pub Date : 2024-10-10 DOI:10.1016/j.aquatox.2024.107118

Yangyang Yang , Jiaqiang Liu , Haoran Lu , Jun Hou , Xiulei Fan , Qiang Liu , Minglei Zhao , Lingxiao Ren , Guoxiang You

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Abstract

Tire wear particles (TWP) represent a distinctive form of microplastics (MPs) that are widely distributed in aquatic ecosystems. However, the toxicity of various types of TWP on phytoplankton remain to be further explored. Thus, three different TWPs originating from replaced bicycle, car, and electro-mobile tire (marked as BTWP, CTWP, and ETWP) were selected and their long-term biological influences on Chlorella vulgaris were investigated. Results demonstrated TWPs showed a concentration-dependent growth promotion of Chlorella vulgaris, with a maximum promotion rate reached to 40.51% (10 mg/L, 10 d), 23.5% (80 mg/L, 12 d), and 28.7% (20 mg/L, 12 d) in the presence of BTWP, CTWP and ETWP, respectively. Meanwhile, TWPs could stimulate the secretion of EPS and induce oxidative stress. EPS analysis revealed the increase of polysaccharides could protect the cell from the direct contact with TWP particles. Moreover, the increased concentration of EPS also helps to induce the settlement of TWP and reduce the leachate release. The release of TWP into the environment could act as an accelerator for the growth of Chlorella vulgaris, which might further change the normal physicochemical behaviors of algae colony in aquatic system. Our findings provide new insights into the toxicity mechanism of TWPs on freshwater algae and valuable data on environmental risk assessment of TWPs.

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轮胎磨损颗粒对藻类小球藻的生长、胞外聚合物质生成和氧化应激的影响：性能和机理

轮胎磨损颗粒（TWP）是微塑料（MPs）的一种独特形式，广泛分布于水生生态系统中。然而，各类 TWP 对浮游植物的毒性仍有待进一步研究。因此，研究人员选择了三种不同的 TWPs（标记为 BTWP、CTWP 和 ETWP），它们分别来自被替换的自行车轮胎、汽车轮胎和电动车轮胎，并研究了它们对绿藻的长期生物影响。结果表明 TWPs 对小球藻的生长具有浓度依赖性的促进作用，在 BTWP、CTWP 和 ETWP 的存在下，最大促进率分别达到 40.51%（10 mg/L，10 d）、23.5%（80 mg/L，12 d）和 28.7%（20 mg/L，12 d）。同时，TWPs 能刺激 EPS 的分泌并诱导氧化应激。EPS 分析表明，多糖的增加可以保护细胞免受 TWP 粒子的直接接触。此外，EPS 浓度的增加还有助于促使 TWP 沉降，减少沥滤液的排放。TWP 释放到环境中可能会加速小球藻的生长，从而进一步改变水生系统中藻类群落的正常理化行为。我们的研究结果为了解 TWPs 对淡水藻类的毒性机制提供了新的视角，也为 TWPs 的环境风险评估提供了宝贵的数据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Aquatic Toxicology 环境科学-毒理学

CiteScore

7.10

自引率

4.40%

发文量

250

审稿时长

56 days

期刊介绍： Aquatic Toxicology publishes significant contributions that increase the understanding of the impact of harmful substances (including natural and synthetic chemicals) on aquatic organisms and ecosystems. Aquatic Toxicology considers both laboratory and field studies with a focus on marine/ freshwater environments. We strive to attract high quality original scientific papers, critical reviews and expert opinion papers in the following areas: Effects of harmful substances on molecular, cellular, sub-organismal, organismal, population, community, and ecosystem level; Toxic Mechanisms; Genetic disturbances, transgenerational effects, behavioral and adaptive responses; Impacts of harmful substances on structure, function of and services provided by aquatic ecosystems; Mixture toxicity assessment; Statistical approaches to predict exposure to and hazards of contaminants The journal also considers manuscripts in other areas, such as the development of innovative concepts, approaches, and methodologies, which promote the wider application of toxicological datasets to the protection of aquatic environments and inform ecological risk assessments and decision making by relevant authorities.