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纳米塑料和砷对斑马鱼的联合毒性

中国环境科学 2024年第4期44卷 2345-2356页

作者：吕敏李国新李青松邱陈陈张丹丹厦门理工学院环境科学与工程学院厦门市水资源利用与保护重点实验室福建厦门361024 中国科学院城市环境研究所福建厦门361021

以斑马鱼为供试生物,采用半静态实验法,将其分别暴露于5mg/L聚苯乙烯纳米塑料(PS-NPs),1、10和100μg/L砷(As)单一及其复合污染中7d,探讨PS-NPs影响下As在斑马鱼肝脏、肠道、鳃和肌肉组织中的积累,肝脏和鳃中PS-NPs的荧光强度和应激响应... 详细信息

以斑马鱼为供试生物,采用半静态实验法,将其分别暴露于5mg/L聚苯乙烯纳米塑料(PS-NPs),1、10和100μg/L砷(As)单一及其复合污染中7d,探讨PS-NPs影响下As在斑马鱼肝脏、肠道、鳃和肌肉组织中的积累,肝脏和鳃中PS-NPs的荧光强度和应激响应.结果表明:PS-NPs能在斑马鱼的肝脏和鳃中富集,且促进As在斑马鱼各组织中的积累.在5mg/L PS-NPs和100μg/L As复合污染下,肝脏、鳃、肠道和肌肉组织的As含量较As单一暴露时分别上升了35.18%、147.33%、163.12%和66.96%.PS-NPs和As的共同暴露导致肝脏的GST和GPx活性增加,MDA含量减少,氧化胁迫减弱.而鳃的GSH含量和GST活性减少,MDA含量增加,氧化胁迫增强.高浓度(100μg/L)As叠加PS-NPs后,鳃中AChE活性显著降低.相比单一As胁迫,混合暴露导致肝脏和鳃中gpx,Mn-sod,Cu/Zn-sod和ache表达量下降,PS-NPs的存在能降低As对斑马鱼氧化应激和神经毒性相关基因的诱导表达量.

关键词：斑马鱼纳米塑料砷氧化胁迫复合污染

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Double-stranded RNAs associated with the hypovirulence of Sclerotinia sclerotiorum strain Ep-1PN

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Progress in Natural Science:Materials International 1999年第11期 37-42页

作者：李国庆,姜道宏,王道本,易先宏,朱斌,RIMMER samuel Roger department of Plant Protection Huazhong Agricultural University Wuhan430070 China department of Plant Protection Huazhong Agricultural University Wuhan430070 China department of Plant Protection Huazhong Agricultural University Wuhan430070 China department of Plant Protection Huazhong Agricultural University Wuhan430070 China department of Plant Protection Huazhong Agricultural University Wuhan430070 China department of Plant Science University of Manitoba Winnipeg MB R3T2N2 Canada

Double-stranded RNAs (dsRNAs) associated with the hypovirulence in strain Ep-1PN of Sclerotinia sclerotiorum were identified and characterized. Three dsRNA molecules with the sizes of about 7400, 6420 and 1090 bp were detected in Ep-1PN, but not in Ep-1PNA5, a single-ascospore progeny of Ep-1PN. All of the three dsRNAs, especially the 6420 bp-sized fragment, were closely associated with the hypovirulence of Ep-1PN and they were significantly different from the dsRNAs identified in a virulent strain clone 38.

关键词： Sclerotinia sclerotiorum Ep-1PN hypovirulence dsRNAs.

Regional scientific research benefits threatened-species conservation

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National Science Review 2019年第6期6卷 1076-1079页

作者： Yisi Hu Zhenhua Luo Colin A.Chapman Stuart L.Pimm samuel T.Turvey Michael j.Lawes Carlos A.Peres Tien Ming Lee Pengfei Fan School of Life Sciences Sun Yat-Sen University School of Life Sciences Central China Normal University department of Anthropology and School of Environment Mc Gill University School of Life Sciences University of Kwa Zulu-Natal The College of Life Sciences Northwest University Nicholas School of the Environment Duke University

Although conventional wisdom considers k.owledge of threatened species’ ecology and status essential for conservation, few studies demonstrate this in a quantitative way across many species and within the same political entity. Here,we evaluated the impacts of scientific research against conservation interventions(including funding) and specieslevel correlates, accounting for phylogenetic relatedness, on the conservation

关键词： China Regional scientific research benefits threatened-species conservation

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微塑料联合镉对菲律宾蛤仔抗氧化生理的影响

环境与发展 2020年第12期32卷 100-102页

作者：李国新李斌黄鹤蒋清富厦门理工学院环境科学与工程学院福建厦门361024

微塑料(100nm^5mm)作为一种新型环境污染物,具有潜在的生态风险,受到广泛的关注,但尚缺乏微塑料与重金属协同作用下水生生物的生理应激响应研究。本文研究了在5μm聚苯乙烯微塑料和Cd的单一及组合胁迫下,菲律宾蛤仔(Ruditapes philippin... 详细信息

微塑料(100nm^5mm)作为一种新型环境污染物,具有潜在的生态风险,受到广泛的关注,但尚缺乏微塑料与重金属协同作用下水生生物的生理应激响应研究。本文研究了在5μm聚苯乙烯微塑料和Cd的单一及组合胁迫下,菲律宾蛤仔(Ruditapes philippinarum)消化腺和鳃部的生理响应。结果表明:在微塑料浓度50和500μg/L条件下,菲律宾蛤仔消化腺和鳃部的MDA含量上升,表明微塑料能对生物体产生氧化胁迫,同时组合暴露实验表明二种污染物存在协同效应。单一微塑料处理提高了鳃部SOD、CAT活力。消化腺CAT活性上升,而SOD活性受到抑制。相比单一Cd处理,微塑料协同作用下鳃和消化腺内SOD、CAT等抗氧化酶活力均提高。

关键词：微塑料镉菲律宾蛤仔抗氧化酶

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