聚基酸盐 (PHB) 微塑料暴露对Litopenaeus vannamei生理学和代谢概况的影响

相关实验视频

Updated: Jul 21, 2026

Protocol for Microplastics Sampling on the Sea Surface and Sample Analysis

Protocol for Microplastics Sampling on the Sea Surface and Sample Analysis

Published on: December 16, 2016

Huirong Lv¹, Jungyeol Park¹, Han Kyu Lim²

¹Department of Aquaculture and Aquatic Science, Kunsan National University, Gunsan 54150, Republic of Korea.

The Science of the total environment

|August 18, 2024

概括

可生物降解的PHB微塑料没有对产生急性毒性. 长期暴露于更高PHB度会对生存和生长产生轻微影响,改变肠道微生物组并触发适应性代谢反应.

科学领域:

环境科学环境科学
海洋生物学海洋生物学
毒理学毒理学毒理学

背景情况:

微塑料污染是一个日益严重的环境问题.
了解可生物降解的微塑料,如聚基酸盐 (PHB),对海洋生态系统的影响至关重要.
聚基酸盐 (PHB) 微塑料被提出作为环保替代品,需要进行生态毒理学评估.

研究的目的:

评估PHB微塑料对海洋Litopenaeus vannamei的急性和慢性毒性.
研究PHB微塑料对生长,生理健康和代谢反应的影响.
分析PHB微塑料对肠道微生物组合和多样性的影响.

主要方法:

通过在各种PHB度下进行96小时暴露实验来评估急性毒性.
慢性毒性和生理影响通过60天的养试验,以不同的PHB度来评估.
分析了抗氧化剂/免疫酶活性,马隆迪阿尔海德,溶酶活性,微生物群体结构以及转录基因/代谢基因资料.

主要成果:

高达100毫克/升的PHB微塑料没有显示急性毒性.
在食试验中,PHB度较高导致生存和生长率略有下降,这表明了剂量依赖的效应.
暴露于PHB改变了肠道微生物群,增加了物种丰富性和多样性,带来了细菌种群的转变,并诱导了适应性代谢反应,特别是在脂质代谢中.

结论:

在Litopenaeus vannamei中,PHB微塑料不会引起急性毒性.
长期暴露于更高PHB度会引起应激反应和适应性代谢调整,以及肠道微生物群落的显著改变.
需要进一步的研究才能充分了解可生物降解的微塑料在海洋环境中的长期生态影响.

关键词:

利托佩内亚斯 (Litopenaeus vannamei) 是一个水族群.代谢学代谢学代谢学微生物组是一个微生物组.PHB PHB PHB PHB PHB PHB PHB PHB PHB PHB PHB PHB PHB PHB PHB PHB PHB PHB 文字转录学 (Transcriptomics) 是一个学科.

更多相关视频

Ecotoxicological Effects of Microplastics on Bird Embryo Development by Hatching without Eggshell

Ecotoxicological Effects of Microplastics on Bird Embryo Development by Hatching without Eggshell

Published on: August 14, 2021

Accumulation and Distribution of Fluorescent Microplastics in the Early Life Stages of Zebrafish

Accumulation and Distribution of Fluorescent Microplastics in the Early Life Stages of Zebrafish

Published on: July 4, 2021

相关概念视频

Bioplastics

Bioplastics

Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...

Microbial Bioremediation of Plastics

Microbial Bioremediation of Plastics

Polyethylene terephthalate (PET) is a synthetic polymer widely utilized in the packaging industry, particularly for bottles and containers. Due to its chemical stability and durability, PET accumulates in the environment, contributing significantly to plastic pollution. It comprises repeating units of terephthalic acid and ethylene glycol, resulting in a semi-crystalline structure that is resistant to natural degradation processes.A notable breakthrough in plastic biodegradation came with the...