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作为抗生素引起的应激反应,微藻中挥发性环氧碳的增强释放:基于实验室和船舶实地实验

Xiao-Yu Zhang¹, Li-Jing Yin¹, Xiao-Ping Lang¹

¹Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, and College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China.

Marine environmental research

|September 24, 2024

概括

抗生素如硫甲和氧环素会伤害海洋微藻,增加氧化应激,刺激臭氧破坏性挥发性碳化合物 (VHCs) 的释放. 这凸显了制药污染与气候变化之间存在着令人担忧的联系.

科学领域:

海洋生物学海洋生物学
环境化学环境化学
微藻的生态毒理学

背景情况:

海洋微藻是重要的初级生产者,并在大气化学中发挥作用.
抗生素污染是一个新兴的环境问题,可能对海洋生态系统产生影响.
海洋生物释放的挥发性环氧碳 (VHCs) 有助于臭氧层的消耗和气候变化.

研究的目的:

为了研究硫甲 (SMZ) 和氧环素 (OTC) 对海洋微藻Nitzschia closterium的影响.
确定这些抗生素对VHCs释放的影响.
了解抗生素诱导的VHC生产的潜在机制.

主要方法:

控制的实验室实验暴露Nitzschia closterium不同度的SMZ和OTC.
测量藻类生长参数 (细胞密度,叶绿素a,Fv/Fm).
评估氧化应激标志物 (ROS,可溶性蛋白质,催化酶活性) 和量化VHCs (CHBrCl2,CHBr2Cl,CHBr3).

主要成果:

高度的抗生素抑制了N. closterium的生长,并降低了叶绿素含量.
抗生素暴露增加了活性氧物种 (ROS) 和催化酶 (CAT) 活性,表明氧化应激.
在接受抗生素治疗的组中,HCV的产生和释放 (CHBrCl2,CHBr2Cl,CHBr3) 显著增加,特别是在更高度下.

结论:

抗生素SMZ和OTC对海洋微藻N.closterium产生负面影响.
微藻中抗生素诱导的氧化应激刺激了VHCs的产生和释放.
这项研究揭示了一条新的途径,将制药污染与臭氧层损耗和气候变化联系起来.

关键词:

添加抗生素是一种补充.N. 关闭的空间.氧化应激是一种氧化应激.有反应性氧物种的反应性氧物种.有毒性有毒性挥发性环氧碳化合物挥发性环氧碳化合物

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