Uptake, growth, and oxidative stress responses of Rhizophora mucronata (Poir. in Lam.) propagules exposed to high-density polyethylene microplastics

IF 5.3 3区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Marine pollution bulletin Pub Date : 2025-01-16 DOI:10.1016/j.marpolbul.2025.117569
Pauleanne B. Nacario , Philippe Anthony M. Alfafara , Nelle Andrian M. Ceniza , Eugene T. Bacolod , Maria Kristina O. Paler , Maria Ligaya S. Suico , Noel Peter B. Tan , Lorenz Inri C. Banabatac
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Abstract

The plastic revolution's contribution to global pollution gives rise to microplastics (MPs), bearing a toll on the marine environment. Knowledge of mangrove exposure to MPs causing adverse effects has yet to be elucidated. Hence, the physiological responses of R. mucronata propagules exposed to ubiquitous High-Density Polyethylene Microplastics (HDPE-MPs) were investigated. The set-up consists of a control (0 mg/L) and an environmentally relevant treatment group (32.65 mg/L), acclimatized and exposed for three months. Scanning Electron Microscopy (SEM) shows agglomeration of HDPE-MPs on root surfaces and translocation to the shoot system of smaller MPs (< 50 μm). Attenuated Total Reflectance Fourier Transform-Infrared Spectroscopy (ATR FT-IR) confirmed uptake in the roots. Root length, count, plant height, foliar area, and oxidative stress biomarkers (carbonyl protein and total chlorophyll) all show significant differences (p < 0.05). Indeed, plastic pollution has detrimental effects on mangroves that may consequently affect mangrove forest diversity and productivity.

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根霉(Rhizophora mucronata)的吸收、生长和氧化应激反应。)繁殖体暴露于高密度聚乙烯微塑料
塑料革命对全球污染的贡献导致了微塑料(MPs)的产生,对海洋环境造成了损害。红树林暴露于MPs造成不良影响的知识尚未阐明。因此,本文研究了高密度聚乙烯微塑料(HDPE-MPs)对红毛鼠繁殖体的生理反应。设置包括对照组(0 mg/L)和环境相关处理组(32.65 mg/L),适应并暴露三个月。扫描电镜(SEM)显示HDPE-MPs在根表面聚集,并向较小MPs的茎系统转移(<;50μm)。衰减全反射傅里叶变换红外光谱(ATR FT-IR)证实了根部的吸收。根长、根数、株高、叶面积和氧化胁迫生物标志物(羰基蛋白和总叶绿素)均存在显著差异(p <;0.05)。事实上,塑料污染对红树林有不利影响,可能因此影响红树林的多样性和生产力。
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来源期刊
Marine pollution bulletin
Marine pollution bulletin 环境科学-海洋与淡水生物学
CiteScore
10.20
自引率
15.50%
发文量
1077
审稿时长
68 days
期刊介绍: Marine Pollution Bulletin is concerned with the rational use of maritime and marine resources in estuaries, the seas and oceans, as well as with documenting marine pollution and introducing new forms of measurement and analysis. A wide range of topics are discussed as news, comment, reviews and research reports, not only on effluent disposal and pollution control, but also on the management, economic aspects and protection of the marine environment in general.
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