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Short-term starvation affects fatty acid metabolism of Daphnia magna neonates and juveniles

机译：短期饥饿影响Daphnia Magna Neonates和青少年的脂肪酸代谢

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摘要

As fatty acids are one of the most crucial biomolecules transferred across the aquatic food webs, they are claimed to be bioindicators of stressors. Among the various environmental stressors, food shortage is of prime importance. Lower food availability can affect fatty acid metabolism of organisms. We investigated the effects of short-term starvation on fatty acid metabolism of Daphnia magna neonates and juveniles. The results revealed that the total fatty acid content in neonates and juveniles of daphnids both rapidly declined within 24 h of starvation, and it remained constant after the following 24 h of starvation. In addition, the fatty acid profiles in neonates or juveniles fed for 24 h were not significantly different from that in the fasting individuals, while the feeding daphnids presented notably higher fatty acid saturation and lower unsaturation in relative to the fasting daphnids within the next 24 h. D. magna neonate increased its special need for C16:1n7 over food transformation, and its C16:1n7 content was elevated the most when fed for 48 h, much higher than the other fatty acids. Time-course changes in fatty acid content in starved D. magna showed that the dietary polyunsaturated alpha-linolenic acid, i.e. C18:3n3, could be considered as the potential biomarker in either neonates or juveniles to respond to the abiotic food shortage. This study could offer insights into the assessment of food-deprived stress in terms of fatty acid metabolism for distinct ages of cladocerans.
机译：由于脂肪酸是整个水生食品网中最重要的生物分子之一，因此它们被声称是压力源的生物indicer。在各种环境压力源中，粮食短缺是鼎盛的重要性。较低的食物可用性会影响生物体的脂肪酸代谢。我们调查了短期饥饿对Daphnia Magna新生儿和青少年脂肪酸代谢的影响。结果表明，在饥饿后24小时内，Deaphats和Deaphnids幼年中脂肪酸含量的总脂肪酸含量迅速下降，并且在饥饿后24小时后仍然是恒定的。此外，喂养24小时的新生儿或幼虫中的脂肪酸谱与空腹个体中的脂肪酸谱没有显着差异，而饲养的Daphnids呈现出较高的脂肪酸饱和度和相对于未来24小时内的空腹Daphnid的不饱和度较低。 D. MAGNA Neonate在食物转化上增加了C16：1N7的特殊需要，其C16：1N7含量在喂食48小时时升高，远高于其他脂肪酸。饥饿的D. MAGNA中脂肪酸含量的时间过程变化表明，膳食多不饱和α-亚麻酸，即C18：3N3，可被认为是新生儿或青少年中的潜在生物标志物，以应对非生物粮食短缺。本研究可以在脂肪酸代谢方面对食物匮乏的压力评估进行洞察，以便脂肪酸代谢用于明显的克拉根群。

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  • 来源
    《Aquatic Sciences》 |2021年第1期|15.1-15.11|共11页
  • 作者

    Yang Miao; Wei Jie; Wang Yuan; Shen Chenchen; Xie Xi;

  • 作者单位

    Dalian Ocean Univ Coll Fisheries & Life Sci Liaoning Prov Key Lab Hydrobiol Dalian Peoples R China|Chinese Acad Sci Dalian Inst Chem Phys Dept Biotechnol Dalian Peoples R China;

    Dalian Ocean Univ Coll Fisheries & Life Sci Liaoning Prov Key Lab Hydrobiol Dalian Peoples R China;

    Dalian Ocean Univ Coll Fisheries & Life Sci Liaoning Prov Key Lab Hydrobiol Dalian Peoples R China;

    Dalian Ocean Univ Coll Fisheries & Life Sci Liaoning Prov Key Lab Hydrobiol Dalian Peoples R China;

    Liaoning Ocean & Fisheries Sci Res Inst Dalian Key Lab Genet Resources Marine Shellfish Dalian 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

    Daphnia magna; Neonate; Juvenile; Starvation; Fatty acid; alpha-Linolenic acid;

    机译：Daphnia magna;新生儿;少年;饥饿;脂肪酸;α-亚麻酸;

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