Effect of microplastics exposure on the photosynthesis system of freshwater algae

Wu, Yanmei; Guo, Ping; Zhang, Xiaoyan; Zhang, Yuxuan; Xie, Shuting; Deng, Jun

doi:10.1016/j.jhazmat.2019.04.039

Cited by 303 publications

(73 citation statements)

References 51 publications

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“…The effect concentrations reported in the experimental studies are very variable and often biphasic. Dose-response relationships using growth as the endpoint (Besseling et al, 2014;Sjollema et al, 2016;Gambardella et al, 2018;Wu et al, 2019;Zhao et al, 2019) indicate that the lowest concentrations which induced inhibition (LOEC) varied 0.001-50 mg/L, i.e., within the range of our Low concentration model. Also, similar concentrations of 1-µm PVC (≤50 mg/L) caused significant growth inhibition (Zhang et al, 2017).…”

Section: Discussionmentioning

confidence: 75%

“…• The test parameters should be carefully presented to allow for intercomparisons and meta-analysis growth alone might be insufficient to provide insights into the ecological impacts of MP (Gambardella et al, 2019). Therefore, more sensitive endpoints, such photosynthetic efficiency (e.g., Wu et al, 2019), electron transport (e.g., Mao et al, 2018), and biochemical changes (e.g., Bhattacharya et al, 2010), together with reliable test protocols, are needed to evaluate how microalgae might be affected by polymer particles. At present, it was not possible to include these subcellular responses in the meta-analysis, because of the low number of such studies and considerable variation in the methods employed.…”

Section: Recommendationsmentioning

confidence: 99%

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Micro- and Nanoplastic Exposure Effects in Microalgae: A Meta-Analysis of Standard Growth Inhibition Tests

Reichelt

Gorokhova

2020

Front. Environ. Sci.

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Background: Ecological impacts of micro-and nanoplastics particles (MNP) are among the most discussed environmental concerns. In algae, MNP are commonly hypothesized to reduce growth, which is a standard ecotoxicological endpoint. However, the reported test outcomes vary, with both growth inhibition and stimulation being observed. Due to this conflict of information, a data synthesis for MNP potential to cause growth inhibition in toxicity testing is needed. Methods: We performed a meta-analysis study to assess the effect of MNP exposure on algal growth. Twenty studies published between 2010 and 2020 and representing 16 algal species and five polymer materials administered as particles in size range 0.04-3,000 µm were included in this meta-analysis. A random-effect model was used to estimate the effect size in three datasets: (1) Low concentration range (<100 mg/L), (2) High concentration range (≥100 mg/L), and (3) Full range model (0.004-1,100 mg/L), which encompassed all studies using the combination of experimental settings (test species, MNP concentration, polymer material, and particle size) yielding the highest effect size within a study. Reichelt and Gorokhova Nano/Microplastic Effects on Algal Growth particulates in the test system, and, hence, does not allow to attribute observed effects to the test polymers.

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Section: Discussionmentioning

confidence: 75%

Section: Recommendationsmentioning

confidence: 99%

Micro- and Nanoplastic Exposure Effects in Microalgae: A Meta-Analysis of Standard Growth Inhibition Tests

Reichelt

Gorokhova

2020

Front. Environ. Sci.

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“…Smaller particles may be more easily adsorbed on the surface of microalgal cells to inhibit their growth, such as embedding in microalgal cells, blocking microalgal pores or gas exchanges [13,33]. In addition, different chemical components of MP have different effects on the growth of microalgae [12,20,34,35]. It has been shown that polypropylene MP significantly inhibited the growth of Chlamydomonas reinhardtii, but high-density polyethylene MP had no effect on its growth [20].…”

Section: Microalgal Growthmentioning

confidence: 99%

“…An indicator of PS II activity, F v /F m , is the largest photochemical quantum yield of PS II reaction centrals when all PS II reaction centers are in an open state [45]. The ratio value of F v /F m was relatively stable under normal conditions and was not vulnerable to growth conditions, however this value would decrease if the plant was inhibited by light [35,46]. Previous studies have revealed that MP had influences on microalgal photosynthesis [12,15,19].…”

Section: F V /F Mmentioning

confidence: 99%

Effects of Polystyrene Microplastics on Growth and Toxin Production of Alexandrium pacificum

Liu

Qiu

Tang

et al. 2021

Toxins

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Microplastics (MP) widely distributed in aquatic environments have adverse effects on aquatic organisms. Currently, the impact of MP on toxigenic red tide microalgae is poorly understood. In this study, the strain of Alexandriumpacificum ATHK, typically producing paralytic shellfish toxins (PST), was selected as the target. Effects of 1 and 0.1 μm polystyrene MP with three concentration gradients (5 mg L−1, 25 mg L−1 and 100 mg L−1) on the growth, chlorophyll a (Chl a), photosynthetic activity (Fv/Fm) and PST production of ATHK were explored. Results showed that the high concentration (100 mg L−1) of 1 μm and 0.1 μm MP significantly inhibited the growth of ATHK, and the inhibition depended on the size and concentration of MP. Contents of Chl a showed an increase with various degrees after MP exposure in all cases. The photosynthesis indicator Fv/Fm of ATHK was significantly inhibited in the first 11 days, then gradually returned to the level of control group at day 13, and finally was gradually inhibited in the 1 μm MP treatments, and promotion or inhibition to some degree also occurred at different periods after exposure to 0.1 μm MP. Overall, both particle sizes of MP at 5 and 25 mg L−1 had no significant effect on cell toxin quota, and the high concentration 100 mg L−1 significantly promoted the PST biosynthesis on the day 7, 11 and 15. No significant difference occurred in the cell toxin quota and the total toxin content in all treatments at the end of the experiment (day 21). All MP treatments did not change the toxin profiles of ATHK, nor did the relative molar percentage of main PST components. The growth of ATHK, Chl a content, Fv/Fm and toxin production were not affected by MP shading. This is the first report on the effects of MP on the PST-producing microalgae, which will improve the understanding of the adverse impact of MP on the growth and toxin production of A. pacificum.

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“…Only a few aquatic plants have been examined, including Lemna minor , Myriophyllum spicatum (e.g., earthworms), Chlorella pyrenoidosa and Microcystis. Some researchers have found that MPs inhibit root growth (Kalcikova, Gotvajn, Kladnik, & Jemec, 2017) and shoot length (van Weert, Redondo‐Hasselerharm, Diepens, & Koelmans, 2019), affect plant growth (Wu et al, 2019), reduce photosynthetic activity (Mao et al, 2018) and inhibit photosynthesis (Zhang, Chen, Wang, & Tan, 2017). However, the toxicity of MPs is significantly affected by the level of exposure.…”

Section: In Vivo Toxicology Studies On Microplasticsmentioning

confidence: 99%

Environmental distribution, transport and ecotoxicity of microplastics: A review

Zhou

et al. 2020

J of Applied Toxicology

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Microplastics (MPs) have become a global environmental pollutant because of their unique properties. The extensive MP toxicity reports have focused on the aquatic environment, while the pervasive MP contamination in the soil and air has largely been overlooked. This review summarizes the abundance, sources and transport of MPs in different environments. It analyzes the toxicity of MPs based on various environmentally relevant bacterial, cellular, plant, aquatic animal and mammalian test groups, using both in vitro and in vivo experiments. The combined toxicity effects of MPs and various other environmental pollutants on ecosystems are also discussed. Currently, data on the adverse effects on combined MP toxicity are very limited. Thus, a systematic assessment of the environmental risk in different environments and in various species from MPs is challenging. Thus, this review proposes the possible risks and identifies the knowledge gaps posed by MPs to food safety and human health. K E Y W O R D S combined toxicity, distribution, in vitro toxicity, in vivo toxicity, microplastics 1 | INTRODUCTION Plastics are widely used in several industries and in all aspects of human life due to their low production cost, light weight, versatility and durability (Wang, Tan, Peng, Qiu, & Li, 2016). Plastic consists of natural and synthetic polymers. Synthetic materials are made up of many types of plastic such as polyethylene (PE), polypropylene (PP),

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Effect of microplastics exposure on the photosynthesis system of freshwater algae

Cited by 303 publications

References 51 publications

Micro- and Nanoplastic Exposure Effects in Microalgae: A Meta-Analysis of Standard Growth Inhibition Tests

Micro- and Nanoplastic Exposure Effects in Microalgae: A Meta-Analysis of Standard Growth Inhibition Tests

Effects of Polystyrene Microplastics on Growth and Toxin Production of Alexandrium pacificum

Environmental distribution, transport and ecotoxicity of microplastics: A review

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