基石微藻种类决定了硫甲醇的去除效率:Chlorella pyrenoidosa和微藻联盟的一个案例研究
Ruohan Huang1, Wan Liu1, Jinghua Su2
1Key laboratory of Exploration and Utilization of Aquatic Genetic Resources of the Ministry of Education, Engineering Research Center of Environmental DNA and Ecological Water Health Assessment, Shanghai Ocean University, Shanghai, China.
Frontiers in plant science
|July 21, 2023
概括
菌有效地去除硫甲醇 (SMX),一种常见的抗生素污染物. 微藻联盟显示SMX去除率较低,灵敏度更高,表明单一物种对抗生素降解更好.
科学领域:
- 环境微生物学 环境微生物学
- 水生生态毒理学 水生生态毒理学
- 生物修复是一种生物修复.
背景情况:
- 抗生素污染对水生生态系统构成重大风险.
- 基于微藻的抗生素降解是一个有希望的,但研究不足的领域.
- 微藻多样性和抗生素毒性对去除效率的影响需要进一步研究.
研究的目的:
- 评估五种淡水微藻及其对硫甲醇 (SMX) 的分体的去除效率和耐受性.
- 评估微藻多样性对SMX去除能力和相关生化反应的影响.
- 为选择有效的微藻群体进行抗生素降解提供见解.
主要方法:
- 研究了单个微藻物种 (Chlorella pyrenoidosa,Scenedesmus quadricauda,Dictyosphaerium sp.,Haematoccocus pluvialis,Botryococcus braunii) 和它们的联合体的SMX去除.
- 在SMX压力下评估了微藻耐受性,生长和光合作用活动.
- 分析的生物化学参数包括光合作用颜料,叶绿素光,氧化应激标志物 (O2-,SOD,MDA) 和细胞外酶活动.
主要成果:
- 甲菌表现出最高的SMX清除效率 (49%),明显优于其他物种 (9-16%).
- 它们包括C. pyrenoidosa,S. quadricauda,以及Dictyosphaerium sp. 在内. 显示出更好的SMX耐受性和对生长和光合作用的影响较小.
- 与单个物种相比,微藻群体通常表现出较低的SMX去除能力和更高的SMX敏感性,除了C. pyrenoidosa和S. quadricauda群体.
结论:
- 单个微藻,特别是Chlorella pyrenoidosa,在去除SMX方面比各种微藻联盟更有效.
- 协会中微藻多样性的增加并没有增强抗生素去除能力,并且经常导致更大的敏感性和生物化学破坏.
- 结果表明,在选择单个微藻物种而不是复杂的联盟中,在水生环境中进行有效的抗生素生物修复方面,存在范式转变.
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