广西师范大学学报（自然科学版）2025，Vol.43Issue(1)：65-74,10.DOI:10.16088/j.issn.1001-6600.2024040801
微塑料和镉复合胁迫对禾花鲤标准代谢的影响
Combined Effects of Microplastics and Cadmium on Standard Metabolism of Cyprinus carpio var.Quanzhounensis
摘要
Abstract
In recent years,microplastics(MPs)and cadmium(Cd)have attracted significant attention due to their combined toxic effects on aquatic organisms.Rice flower carp(Cyprinus carpio var.Quanzhounensis)is a characteristic local species in Quanzhou County,Guangxi,China.The effects of combined exposure to MPs and Cd on C.carpio remain unclear.The present study was performed to determine the individual(0.25,0.5,1.0,and 2.0 mg/L Cd or 0.25,0.5,1.0,and 2.0 mg/L MPs)and combined effects of MPs and Cd on the oxygen consumption rate(ηOC),ammonia excretion rate(ηAE),and O/N ratio(ηO/N)of C.carpio var.Quanzhounensis.The results showed that,under single Cd stress,the ηOC initially increased and then decreased with increasing Cd concentration,while ηAE increased,and the ηO/N continuously decreased with increasing Cd concentration.More importantly,the ηO/N was dropped below 7 when the Cd concentration exceeded 1.0 mg/L.Under single MPs stress,the ηOC and ηO/N showed a decreasing trend,which leveled off when the MPs concentration exceeded 0.5 mg/L;Similarly,the ηO/N was also dropped below 7 when the MPs concentration exceeded 1.0 mg/L;In addition,ηAE initially increased and then also exhibited a leveling-off trend when the MPs concentration exceeded 0.5 mg/L.Interestingly,compared with the single exposure groups,the change patterns of oxygen consumption rate,ammonia excretion rate and ηO/N in the co-exposure groups were similar,but with a significantly greater magnitude,indicating a synergistic effect of MPs and Cd on the standard metabolism of C.carpio.Two-way ANOVA showed that the interaction between Cd and MPs significantly affectedηOC,ηAE,and ηO/N(P＞0.05).Moreover,binary logistic regression analysis revealed that Cd had a greater impact on C.carpio than that of MPs.Taken together,both single and combined MPs and Cd affect the standard metabolism of C.carpio;Synergistic toxic effects of MPs and Cd were observed in this study,and the toxicity of Cd was stronger than that of MPs on C.carpio;With increasing exposure concentration,the ηO/N less than 7,indicating that C.carpio may rely exclusively on proteins as an energy source,leading to diminished protein synthesis,which in turn hampers the increase in body weight and harmful to the health of C.carpio.关键词
禾花鲤/微塑料/镉/耗氧率/排氨率Key words
Cyprinus carpio var.Quanzhounensis/microplastics/cadmium/oxygen consumption rate/ammonia excretion rate分类
资源环境引用本文复制引用
程春醒,潘清,吴扬扬,韦金友,韦雨薇,田文斐,蒋骄云..微塑料和镉复合胁迫对禾花鲤标准代谢的影响[J].广西师范大学学报（自然科学版）,2025,43(1):65-74,10.基金项目
广西重点研发计划项目(RZ2200004564) （RZ2200004564）
广西高校中青年教师基础能力提升项目(广西壮族自治区教育厅科学研究项目) （广西壮族自治区教育厅科学研究项目）
