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首页> 外文期刊>Aquatic Sciences >Effects of microcystin-LR and nitrite on the lifespan, reproduction, and heat shock responses of rotifer Brachionus calyciflorus at different temperatures
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Effects of microcystin-LR and nitrite on the lifespan, reproduction, and heat shock responses of rotifer Brachionus calyciflorus at different temperatures

机译：微囊糖-1R和亚硝酸盐对不同温度的肉肉藻寿命，再现和热冲击反应的影响

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摘要

Cyanobacterial blooms aggravate with increasing temperature, and the increased concentrations of toxicants such as cyanotoxins and nitrite during bloom decay adversely affect the growth of aquatic animals. Heat-shock proteins (Hsps) are induced by a wide range of environmental stressors, including temperature and toxicants. In this study,Brachionus calyciflorusPallas was exposed to different combined solutions of microcystin-LR (0, 10, 30, and 100 mu g L-1) and nitrite (0, 1, 3, and 5 mg L-1) to evaluate their effects on the rotifer lifespan, the reproductive rate (R), and the responses of four Hsp genes at 20 degrees C, 25 degrees C, and 30 degrees C. Results revealed that single high doses of microcystin-LR (100 mu g L-1) and nitrite (5 mg L-1) were harmful to the lifespan and reproduction of rotifers. Hormesis was induced by low doses of microcystin-LR (10-30 mu g L-1) and nitrite (1-3 mg L-1). At different toxicant concentrations, the expression levels ofHsp40,Hsp60,Hsp70, andHsp90fluctuated, whereas reactive oxygen species (ROS) levels increased regardless of temperature. The two toxicants induced high levels of ROS production, which negatively affected the lifespan,R, and Hsp gene expression at 30 degrees C (p 0.05). Microcystin-LR and nitrite exerted synergistic effects on the lifespan,R, ROS levels, and Hsp gene expression levels at 20 degrees C and 25 degrees C (p 0.05) but had antagonistic effects onHsp40andHsp60expression levels at 30 degrees C (p 0.05). Temperature, microcystin-LR, and nitrite had interactive effects on the lifespan,R, ROS levels, and Hsp gene expression levels (p 0.05). The expression levels of Hsp genes are useful biomarkers of high-temperature exposure, andHsp-mediated heat shock responses are important in microcystin-LR and nitrite stress tolerance ofB. calyciflorus.
机译：Cyanobacterial Blooms加剧了温度的增加，并且在绽放衰变期间含有氰毒素和亚硝酸盐等毒物浓度的增加对水生动物的生长产生了不利影响。热冲击蛋白（HSP）由各种环境压力源引起，包括温度和毒物。在该研究中，将Broachionus Calycifloruspallas暴露于微囊藻（0,10,130和100μg1-1）和亚硝酸盐（0,1,3和5mg L-1）的不同组合溶液，以评估它们的对旋转器寿命的影响，生殖率（R）和四个HSP基因的响应在20摄氏度，25℃和30℃下。结果显示单一高剂量的微囊糖-LR（100μgl- 1）和亚硝酸盐（5mg l-1）对寿命的寿命和再生产有害。通过低剂量的微囊糖-LR（10-30μg1-1）和亚硝酸盐（1-3mg L-1）诱导血液化。在不同的毒物浓度下，HSP40，HSP60，HSP70，ANDSP90透明的表达水平，而无需氧（ROS）水平，无论温度如何都会增加。这两种毒物诱导高水平的ROS生产，这对寿命，R和HSP基因表达产生了负面影响30摄氏度（P <0.05）。微囊杆菌和亚硝酸盐对20摄氏度和25摄氏度的寿命，R，ROS水平和HSP基因表达水平施加协同作用（P <0.05），但在30摄氏度下对拮抗作用进行拮抗作用ONHSP40和HSP60表达水平（P> 0.05） 。温度，微囊杆菌和亚硝酸盐对寿命，R，ROS水平和HSP基因表达水平具有相互作用的影响（P <0.05）。 HSP基因的表达水平是高温暴露的有用生物标志物，ANDSP介导的热冲击反应在微胱氨酸-1R和亚硝酸盐应力耐受性中是重要的。 Calyciflorus。

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  • 来源
    《Aquatic Sciences》 |2020年第4期|74.1-74.14|共14页
  • 作者

    Liang Ye; Gao Tianheng; Shao Li; Min Yuanqi; Yang Jiaxin;

  • 作者单位

    Nanjing Univ Informat Sci & Technol Sch Marine Sci 219 Ningliu Rd Nanjing 210044 Peoples R China|Nanjing Normal Univ Sch Marine Sci & Engn 1 Wenyuan Rd Nanjing 210023 Peoples R China;

    Hohai Univ Coll Oceanog Inst Marine Biol 1 XiKang Rd Nanjing 210098 Peoples R China;

    Nanjing Normal Univ Sch Marine Sci & Engn 1 Wenyuan Rd Nanjing 210023 Peoples R China;

    Nanjing Normal Univ Sch Marine Sci & Engn 1 Wenyuan Rd Nanjing 210023 Peoples R China;

    Nanjing Normal Univ Sch Marine Sci & Engn 1 Wenyuan Rd Nanjing 210023 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Rotifer; Temperature; Life expectancy; Reproductive rate; Heat shock proteins;

    机译：Rotifer;温度;寿命;生殖率;热休克蛋白;

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