(2-乙烯基) 甲酸盐对摩伊纳巨 (甲类:Cladocera) 的生长,发育和繁殖的影响
Amornrat Chaikritsadakarn1, Banchong Witthayawirasak1,2, Dudsadee Muenhor1,3,2
1Faculty of Environmental Management, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand.
Heliyon
|April 10, 2024
概括
(2-乙烯基) 甲酸盐 (DEHP) 没有影响水的生长或繁殖. 然而,高DEHP度改变了黄体形态,表明细胞应激,尽管Moina macrocopa的抗氧化反应.
科学领域:
- 环境毒理学环境毒理学
- 水生生态学 水生生态学
- 生态毒理学 生态毒理学
背景情况:
- 二甲基甲酸盐 (DEHP) 是一种广泛使用的增塑剂,对水生生态系统的影响尚不清楚.
- 水体是DEHP释放的主要途径,需要对其对水生影响进行调查.
- 水 (Moina macrocopa) 是水生生态系统健康的敏感指标.
研究的目的:
- 评估DEHP暴露对Moina macrocopa的生长和繁殖的影响.
- 研究DEHP对Moina macrocopa卵巢细胞病理的影响,特别是黄体.
- 了解水生无脊椎动物中DEHP诱导的氧化应激的潜力.
主要方法:
- 莫伊纳麦克罗科帕被暴露在不同度的DEHP (1,10,100,1000μg/L) 中.
- 监测了生长和生殖的参数.
- 对卵巢黄体进行了大小,数量和形态分析.
主要成果:
- 暴露于DEHP并没有显著影响整体生长或生殖产出.
- 高度的DEHP (1000μg/L) 导致黄体数量增加和形态异常,包括杆状体.
- 细胞病理表明潜在的抗氧化压力,尽管整体功能没有受到影响.
结论:
- 在生长和繁殖方面,Moina macrocopa对DEHP表现出弹性,这可能是由于有效的抗氧化剂反应.
- 在水生无脊椎动物中,DEHP可以诱导细胞水平的压力,黄体的变化证明了这一点.
- 这些发现有助于理解水生生态系统中的DEHP风险,并支持以前的风险评估数据.
相关概念视频
01:17Factors Affecting Activity Coefficient
The extended Debye-Hückel equation indicates that the activity coefficient of an ion in an aqueous solution at 25°C depends on three partially interdependent properties: the ionic strength of the solution, the charge of the ion, and the ion size.
The activity coefficient value for an ion is close to one when the solution has almost zero ionic strength, i.e., when the solution shows close to ideal behavior. As the ionic strength of the solution increases from 0 to 0.1 mol/L, a decrease in the...
The activity coefficient value for an ion is close to one when the solution has almost zero ionic strength, i.e., when the solution shows close to ideal behavior. As the ionic strength of the solution increases from 0 to 0.1 mol/L, a decrease in the...
01:29Biosynthesis of Lipids
Microbial membranes exhibit remarkable diversity in lipid composition, reflecting evolutionary adaptations to various environmental conditions. The three domains of life—Bacteria, Archaea, and Eukarya—synthesize membrane lipids through distinct biosynthetic pathways, leading to fundamental structural differences that impact membrane stability, function, and adaptability.Fatty Acid-Based Lipids in Bacteria and EukaryaBacteria and eukaryotes share a common fatty acid biosynthesis pathway, which...
01:29Factors Influencing Microbial Growth: pH
Microorganisms are classified as acidophiles, neutrophiles, or alkaliphiles based on their pH growth preferences, reflecting their adaptations to specific environments. Maintaining a stable intracellular pH is critical for macromolecular stability and enzymatic activity, which can be challenged by external pH variations.Neutrophiles, such as Escherichia coli, grow optimally between pH 5.5 and 8.0. These microorganisms inhabit neutral or slightly acidic environments and employ mechanisms like...
01:28Factors Influencing Microbial Growth: Osmolarity
Osmolarity is the measure of solute concentration in a solution. It plays a critical role in determining water availability for organisms. Water moves across semipermeable membranes through osmosis, flowing from regions of lower solute concentration (more dilute) to regions of higher solute concentration (more concentrated).In high-solute environments, microbial cells lose water, leading to dehydration and inhibited growth. The extent to which water is available to microbes in such environments...
01:23Stringent Response in E. coli
Bacterial growth is closely tied to nutrient availability, with cells proliferating exponentially under favorable conditions and entering a stationary phase when resources become scarce. This transition is mediated by a regulatory mechanism known as the stringent response, which allows bacteria to adapt to nutrient deprivation by modulating gene expression and metabolic activity.During nutrient scarcity, intracellular amino acid levels decline. It results in the accumulation of uncharged tRNAs...
01:30Marine Microbial Ecology
Marine microbial ecosystems are shaped by distinct physicochemical limits, including high salinity, low nutrient availability, and fluctuating oxygen levels. These conditions favor smaller microbial cell sizes, which maximize their surface-to-volume ratio for efficient nutrient uptake.Microbial activity and community composition are closely linked to biogeochemical cycles, particularly in dynamic environments like estuaries, where halotolerant microbes thrive in response to variable salinity...