聚乙烯微塑料(PE-MPs)对番茄的梯度依赖性慢性毒性

IF 2.6 4区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES
Periyasamy Dhevagi, Raveendra Gnana Keerthi Sahasa, Ramesh Poornima, Sundarajayanthan Ramakrishnan, Ambikapathi Ramya, Sengottaiyan Priyatharshini
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引用次数: 0

摘要

尽管人们越来越关注陆地生态系统中的微塑料污染问题,但有关各种微塑料对陆生植物可能造成的后果的研究却很少。在这项研究中,研究了不同浓度(0、0.25、0.50、0.75 和 1.00%)的聚乙烯微塑料(PE-MPs)对番茄(Solanum lycopersicum)的毒性。结果表明,浓度对番茄的生理、生化、生长、产量属性和果实质量都有负面影响。在各种浓度中,0.75% 和 1.00% 的 PE-MPs 产生的影响最大,而在研究的各个生长阶段(营养期、开花期、结果期和收获期)中,结果期的影响最大。除了对生理特性产生有害影响外,研究还证实 PE-MPs 还会对植物产生氧化压力,从而推迟植物的初花期。此外,接触 1.00% 的 PE-MPs 会导致每簇花朵数(17.67%)、每株花簇数(18.27%)、每簇果实数(32.76%)、每株果实数(56.33%)和单果重量(47.57%)的最大降幅。此外,还观察到 1.00% 的 PE-MPs 会显著降低果实质量,如滴定酸度、抗坏血酸和番茄红素含量,降幅分别为 22.32%、21.09% 和 23.96%。此外,施用 1.00% 的聚乙烯-MPs 会降低土壤容重、可利用的磷和钾,而导电率、有机碳、微生物生物量碳(8%)、NO3-N(22%)和 NH4-N(23%)则会明显增加。此外,土壤中 PE-MPs 的存在对土壤酶活性也有重大影响。元基因组分析(16 秒)显示,与含有 1.00% PE-MPs 的根瘤土壤相比,对照组具有更高的多样性、丰富度和均匀度。这些结果可为进一步研究微塑料对番茄的毒性提供理论依据和数据支持,并有助于了解微塑料对植物毒性作用的类型特异性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Gradient Dependent Chronic Toxicity of Polyethylene Microplastics (PE-MPs) on Tomato

Gradient Dependent Chronic Toxicity of Polyethylene Microplastics (PE-MPs) on Tomato

Despite growing concern about microplastic contamination in terrestrial ecosystems, there have been few researches on the possible consequences of various microplastics on terrestrial plants. In this study, the toxicity of Polyethylene microplastics (PE-MPs) with different concentrations (0, 0.25, 0.50, 0.75 and 1.00%) to tomato (Solanum lycopersicum) were studied. Results showed a concentration-dependent negative impacts on the physiological, biochemical, growth, yield attributes and fruit quality of tomatoes. Amongst various concentrations, the maximum effect was observed with 0.75 and 1.00% PE-MPs and among the various growth stages studied (vegetative, flowering, fruiting and harvest), the highest impact was observed during the fruiting stage. Besides exhibiting a deleterious effect on physiological traits, it was also confirmed that PE-MPs could exert oxidative stress in plants thereby delaying the days to first flowering. Moreover, exposure to PE-MPs at 1.00% recorded the maximum reduction in the number of flowers per cluster (17.67%), number of flower clusters per plant (18.27%), number of fruits per cluster (32.76%), number of fruits per plant (56.33%) and single fruit weight (47.57%). Furthermore, 1.00% PE-MPs exposure was also observed to significantly reduce the fruit quality like titrable acidity, ascorbic acid and lycopene content by 22.32, 21.09 and 23.96% respectively. Additionally, the application of 1.00% PE –MPs decreased the soil bulk density, available phosphorus and potassium; whereas, the EC, organic carbon, microbial biomass carbon (8%), NO3–N (22%), NH4–N (23%) significantly increased. Moreover, the presence of PE-MPs in soil also had a significant influence on the soil enzyme activities. Metagenomic analysis (16 s) reveals that control had higher diversity, richness and evenness, compared to rhizosphere soil with 1.00% PE-MPs. These results can provide a theoretical basis and data support for further investigation on the toxicity of microplastics to tomatoes, and contribute to understanding the type specificity of microplastics’ toxic effects on plants.

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来源期刊
CiteScore
5.40
自引率
0.00%
发文量
104
审稿时长
1.7 months
期刊介绍: International Journal of Environmental Research is a multidisciplinary journal concerned with all aspects of environment. In pursuit of these, environmentalist disciplines are invited to contribute their knowledge and experience. International Journal of Environmental Research publishes original research papers, research notes and reviews across the broad field of environment. These include but are not limited to environmental science, environmental engineering, environmental management and planning and environmental design, urban and regional landscape design and natural disaster management. Thus high quality research papers or reviews dealing with any aspect of environment are welcomed. Papers may be theoretical, interpretative or experimental.
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