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首页> 外文期刊>Philosophical Transactions of the Royal Society of London, Series B. Biological Sciences >Fatty acid bioconversion in harpacticoid copepods in a changing environment: a transcriptomic approach
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Fatty acid bioconversion in harpacticoid copepods in a changing environment: a transcriptomic approach

机译：在变化环境中的胡椒蛋白桡足类脂肪酸生物转化：转录组方法

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By 2100, global warming is predicted to significantly reduce the capacity of marine primary producers for long-chain polyunsaturated fatty acid (LC-PUFA) synthesis. Primary consumers such as harpacticoid copepods (Crustacea) might mitigate the resulting adverse effects on the food web by increased LC-PUFA bioconversion. Here, we present a high-quality de novo transcriptome assembly of the copepodPlatychelipus littoralis, exposed to changes in both temperature (+3 degrees C) and dietary LC-PUFA availability. Using this transcriptome, we detected multiple transcripts putatively coding for LC-PUFA-bioconverting front-end fatty acid (FA) desaturases and elongases, and performed phylogenetic analyses to identify their relationship with sequences of other (crustacean) taxa. While temperature affected the absolute FA concentrations in copepods, LC-PUFA levels remained unaltered even when copepods were fed an LC-PUFA-deficient diet. While this suggests plasticity of LC-PUFA bioconversion withinP. littoralis, none of the putative front-end desaturase or elongase transcripts was differentially expressed under the applied treatments. Nevertheless, the transcriptome presented here provides a sound basis for future ecophysiological research on harpacticoid copepods. This article is part of the theme issue 'The next horizons for lipids as 'trophic biomarkers': evidence and significance of consumer modification of dietary fatty acids'.
机译：到2100时，预计全球变暖将显着降低海洋初级生产者对长链多不饱和脂肪酸（LC-PUFA）合成的能力。诸如Harpacticoid Copepods（甲壳包裹）的主要消费者可能通过增加的LC-PUFA生物转化来减轻对食物网的不利影响。在这里，我们介绍了CopepodplatyChelipus Littoralis的高质量De Novo转录组合组件，暴露于温度（+ 3℃）和膳食LC-PUFA可用性的变化。使用该转录组，我们检测到对LC-PUFA-生物耦合前端脂肪酸（FA）去饱和酶和延伸酶的多个转录物，并进行系统发育分析以鉴定其与其他（甲壳类）分类序列的关系。虽然温度影响了CopePods中的绝对FA浓度，但即使桡足类药物喂养LC-PUFA缺乏饮食，LC-PUFA水平也仍未变化。虽然这表明LC-PUFA生物转换内的可塑性。在施加的处理下，Littoralis，没有推定的前端去饱和酶或延长酶转录物差异表达。然而，这里介绍的转录体为未来的胡椒蛋白桡足类药研究提供了一种合理的生态学研究。本文是主题问题的一部分，是脂质的下一个视野作为“营养生物标志物”：消费者修饰膳食脂肪酸的证据和意义。

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