接触微塑料降低了地鳖虫(Blaps polychresta)的排便率,改变了消化酶活性,并导致中肠组织发生组织学和超细胞变化。

IF 2.3 2区 农林科学 Q1 ENTOMOLOGY Journal of insect physiology Pub Date : 2024-08-17 DOI:10.1016/j.jinsphys.2024.104697
Samar El kholy , Taiwo Ayorinde , Christie M. Sayes , Yahya Al Naggar
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引用次数: 0

摘要

人们对陆地系统中微塑料(MP)污染的关注与日俱增。据信,陆地系统中的微塑料总量可能是海洋中的 4-23 倍。农业生态系统是受到微塑料污染最严重的地区之一。由于地鳖虫等陆生生物常见于花园和农业区,因此它们更容易受到各种农业土壤中 MPs 的影响。因此,这项工作旨在首次评估地鳖虫在长期接触 2%(重量/湿重)浓度的三种不同不规则形状的 MPs 聚合物 30 天后可能产生的不良影响:聚苯乙烯(PS)、聚对苯二甲酸乙二酯(PET)和聚酰胺 6(PA,即尼龙 6)对甲虫健康的潜在不利影响。结果表明,聚苯乙烯(PS)和聚对苯二甲酸乙二酯(PET)以及聚酰胺 6(PA,即尼龙 6)对甲虫的存活率没有影响;不过,甲虫的排便率有所下降,尤其是接触聚苯乙烯-MPs 的甲虫,中肠消化酶的活性也发生了变化。对消化酶(淀粉酶、蛋白酶、脂肪酶和 α-葡萄糖苷酶)的影响具有聚合物和酶的特异性。此外,组织学和细胞学研究表明,中肠周围膜分解,中肠细胞核形状异常、空泡化、微绒毛紊乱、鹅口疮细胞和柱状细胞坏死以及线粒体坏死。鉴于地鳖虫在大多数农业和园林环境中作为天敌的重要性,报告的 MPs 对其健康的不利影响可能会影响其生存和生态功能。
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Microplastic exposure reduced the defecation rate, altered digestive enzyme activities, and caused histological and ultracellular changes in the midgut tissues of the ground beetle (Blaps polychresta)

Concerns about microplastic (MP) pollution in terrestrial systems are increasing. It is believed that the overall amount of MPs in the terrestrial system could be 4–23 times higher than that in the ocean. Agricultural ecosystems are among the most polluted areas with MPs. Terrestrial organisms such as ground beetles, will be more vulnerable to MPs in various agricultural soil types because they are common in garden and agricultural areas. Therefore, this work aims to assess for the first time the potential adverse effects of chronic exposure for 30 days of ground beetles to a field-realistic concentration of 2 % (w/w) of three different irregularly shaped MPs polymers: Polystyrene (PS), polyethylene terephthalate (PET), and polyamide 6 (PA; i.e., nylon 6) on their health. The results showed no effect on beetle survival; nevertheless, there was a decrease in beetle defecation rate, particularly in beetles exposed to PS-MPs, and a change in the activity of midgut digestive enzymes. The effects on digestive enzymes (amylase, protease, lipase, and α-glucosidase) were polymer and enzyme specific. Furthermore, histological and cytological studies demonstrated the decomposition of the midgut peritrophic membrane, as well as abnormally shaped nuclei, vacuolation, disordered microvilli, necrosis of goblet and columnar cells, and necrosis of mitochondria in midgut cells. Given the importance of ground beetles as predators in most agricultural and garden settings, the reported adverse impacts of MPs on their health may impact their existence and ecological functions.

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来源期刊
Journal of insect physiology
Journal of insect physiology 生物-昆虫学
CiteScore
4.50
自引率
4.50%
发文量
77
审稿时长
57 days
期刊介绍: All aspects of insect physiology are published in this journal which will also accept papers on the physiology of other arthropods, if the referees consider the work to be of general interest. The coverage includes endocrinology (in relation to moulting, reproduction and metabolism), pheromones, neurobiology (cellular, integrative and developmental), physiological pharmacology, nutrition (food selection, digestion and absorption), homeostasis, excretion, reproduction and behaviour. Papers covering functional genomics and molecular approaches to physiological problems will also be included. Communications on structure and applied entomology can be published if the subject matter has an explicit bearing on the physiology of arthropods. Review articles and novel method papers are also welcomed.
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