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首页> 外文期刊>Marine biology >Response of the calcifying coccolithophore Emiliania huxleyi to low pH/high pCO2: from physiology to molecular level
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Response of the calcifying coccolithophore Emiliania huxleyi to low pH/high pCO2: from physiology to molecular level

机译：钙化石墨巨噬菌对低pH /高pCO2的响应：从生理学到分子水平

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摘要

The emergence of ocean acidification as a significant threat to calcifying organisms in marine ecosystems creates a pressing need to understand the physiological and molecular mechanisms by which calcification is affected by environmental parameters. We report here, for the first time, changes in gene expression induced by variations in pH/pCO_2 in the widespread and abundant coccolithophore Emiliania huxleyi. Batch cultures were subjected to increased partial pressure of CO_2 (pCO_2; i.e. decreased pH), and the changes in expression of four functional gene classes directly or indirectly related to calcification were investigated. Increased pCO2 did not affect the calcification rate and only carbonic anhydrase transcripts exhibited a significant down-regulation. Our observation that elevated pCO_2 induces only limited changes in the transcription of several transporters of calcium and bicarbonate gives new significant elements to understand cellular mechanisms underlying the early response of E. huxleyi to CO_2-driven ocean acidification.
机译：海洋酸化作为对海洋生态系统中钙化生物的重大威胁的出现，迫切需要了解钙化受环境参数影响的生理和分子机制。我们在这里首次报道了在广泛而丰富的球石藻Emiliania huxleyi中pH / pCO_2的变化引起的基因表达变化。使分批培养物经受增加的CO_2分压（pCO_2；即pH降低），并研究与钙化直接或间接相关的四种功能基因类别的表达变化。增加的pCO2不会影响钙化速率，只有碳酸酐酶转录物表现出明显的下调。我们的观察到，升高的pCO_2只能诱导几种钙和碳酸氢根转运蛋白的转录产生有限的变化，这为理解huxleyi对CO_2驱动的海洋酸化早期反应的细胞机制提供了新的重要意义。

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    《Marine biology》 |2011年第3期|p.551-560|共10页
  • 作者

    Sophie Richier; Sarah Fiorini; Marie-Emmanuelle Kerros; Peter von Dassow; Jean-Pierre Gattuso;

  • 作者单位

    INSU-CNRS, Laboratoire d'Oceanographie de Villefranche,B.P. 28, 06234 Villefranche-sur-mer Cedex, France,UPMC University of Paris 06, Observatoire Oceanologique de Villefranche, 06230 Villefranche-sur-mer, France,National Oceanography Centre, Southampton,University of Southampton Waterfront Campus,European Way, Southampton SO 14 3ZH, UK;

    INSU-CNRS, Laboratoire d'Oceanographie de Villefranche,B.P. 28, 06234 Villefranche-sur-mer Cedex, France,UPMC University of Paris 06, Observatoire Oceanologique de Villefranche, 06230 Villefranche-sur-mer, France,Netherlands Institute of Ecology (NIOO-KNAW), P.O. Box 140,4400 AC Yerseke, The Netherlands;

    INSU-CNRS, Laboratoire d'Oceanographie de Villefranche,B.P. 28, 06234 Villefranche-sur-mer Cedex, France,UPMC University of Paris 06, Observatoire Oceanologique de Villefranche, 06230 Villefranche-sur-mer, France;

    Departamento de Ecologfa, Facultad de Ciencias Biologicas,Pontificia Universidad Catolica de Chile, Alameda #340,Santiago, Chile;

    INSU-CNRS, Laboratoire d'Oceanographie de Villefranche,B.P. 28, 06234 Villefranche-sur-mer Cedex, France,UPMC University of Paris 06, Observatoire Oceanologique de Villefranche, 06230 Villefranche-sur-mer, France;

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