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Effects of the oxylipin-producing diatom Skeletonema marinoi on gene expression levels of the calanoid copepod Calanus sinicus

机译:产生产脂蛋白的硅藻Markeleonema marinoi对the足类pe足类Calanus sinicus基因表达水平的影响

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Diatoms are eukaryotic unicellular plants that constitute one of the major components of marine phytoplankton, comprising up to 40% of annual productivity at sea and representing 25% of global carbon-fixation. Diatoms have traditionally been considered a preferential food for zooplankton grazers such as copepods, but, in the last two decades, this beneficial role has been challenged after the discovery that many species of diatoms produce toxic metabolites, collectively termed oxylipins, that induce reproductive failure in zooplankton grazers. Diatoms are the dominant natural diet of Calanus sinicus, a cold-temperate calanoid copepod that supports secondary production of important fisheries in the shelf ecosystems of the Northwest Pacific Ocean, Yellow Sea, Sea of Japan and South China Sea. In this study, the effect of the oxylipin-producing diatom Skeletonema marinoi on C. sinicus has been evaluated by analyzing expression level changes of genes involved in defense and detoxification systems. Results show that C sinicus is more resistant to a diet of this diatom species in terms of gene expression patterns, compared to the congeneric species Calanus helgolandicus which is an important constituent of the temperate waters of the Atlantic Ocean and northern Mediterranean Sea. These findings contribute to the better understanding of genetic and/or phenotypic flexibility of copepod species and their capabilities to cope with stress by identifying molecular markers (such as stress and detoxification genes) as biosensors for environmental perturbations (e.g. toxins and contaminants) affecting marine copepods. (C) 2015 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
机译:硅藻是真核单细胞植物,构成海洋浮游植物的主要组成部分之一,占海上年生产力的40%,占全球固碳的25%。硅藻传统上被认为是浮游生物放牧者(如co足类)的优先食物,但是,在过去的二十年中,发现许多硅藻产生有毒代谢产物(统称为羟脂)后,这种有益作用受到挑战。浮游动物放牧者。硅藻是Calanus sinicus的主要自然饮食,Calanus sinicus是一种冷温的类an足类足类动物,支持西北太平洋,黄海,日本海和南海的陆架生态系统中重要渔业的二次生产。在这项研究中,已通过分析参与防御和排毒系统的基因的表达水平变化,评估了产生含脂蛋白的硅藻Skeletonema marinoi对中华绒螯蟹的作用。结果表明,与同类动物Calanus helgolandicus相比,中华绒螯蟹对这种硅藻物种的饮食具有更强的抵抗力,而后者是大西洋和地中海北部温带水域的重要组成部分。这些发现有助于通过识别分子标记物(例如压力和解毒基因)作为影响海洋by足类动物的环境扰动(例如毒素和污染物)的生物传感器,从而更好地了解co足类物种的遗传和/或表型灵活性及其应对压力的能力。 。 (C)2015作者。由Elsevier B.V.发布。这是CC BY-NC-ND许可(http://creativecommons.org/licenses/by-nc-nd/4.0/)下的开放获取文章。

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