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Transcriptome-wide responses of aggregates of the diatom Odontella aurita to oil

机译：转录的Diatom Odontella Aurita对油的聚集体反应

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摘要

Diatom aggregates can play an important role in the formation of marine oil snow and the transport of oil from the sea surface to the benthos, yet their molecular response to oil has not been characterized. Here we use RNA-seq to analyze the transcriptome-wide responses of aggregates of the common Gulf of Mexico diatom Odontella aurita exposed to the water accommodated fraction of 2 different types of oil, Macondo surrogate and Refugio Beach oil. We identify a common set of 353 genes that are differentially expressed in response to both Macondo and Refugio oil exposure, relative to controls. Genes related to photosynthesis, and nuclear and ribosomal processes were all down-regulated in oil treatments, while genes related to repairing membrane damage, cellular stress, and the production of exopolymeric substances were up-regulated. Differential expression of genes was often greater in magnitude in the Refugio than the Macondo oil treatment, which may be due to differences in oil concentration in the treatments or to the physiochemical characteristics of the oils. Exposure to Refugio oil induced more severe nucleolar stress and more damage to chloroplasts than the lighter Macondo oil, which triggered an up-regulation of a more diverse suite of stress-response genes.
机译：硅藻聚集体可以在海洋油雪的形成中发挥重要作用，并从海面到Benthos的石油运输，但它们对油的分子反应尚未表征。在这里，我们使用RNA-SEQ分析墨西哥岛常见海湾欧洲州普通湾聚集的转录物组响应暴露于2种不同类型的油，Macondo代理和Refugio海滩油的水分分数。我们鉴定了相对于对照组的常见表达的常见表达的常见353个基因。与光合作用相关的基因和核和核糖体过程在油处理中都是下调的，而与修复膜损伤，细胞胁迫和产量产生的基因有关的基因均上调。避免的基因的差异表达常剧比Macondo油处理在内，这可能是由于治疗中的油浓度或油脂的生理化学特性的差异。暴露于refugio油诱导更严重的核仁胁迫并比叶绿体损伤更多，而不是较轻的macondo油，这引发了更多样化的应激反应基因的上调。

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