The Mina and Everard Goodman Faculty of Life Sciences, Bar Ilan University, Ramat Gan, Israel.
Department of Molecular Biology, Ariel University, Ariel, Israel.
Sci Rep. 2017 Feb 9;7:42405. doi: 10.1038/srep42405.
The anthropogenic increase in atmospheric CO that drives global warming and ocean acidification raises serious concerns regarding the future of corals, the main carbonate biomineralizers. Here we used transcriptome analysis to study the effect of long-term gradual temperature increase (annual rate), combined with lowered pH values, on a sub-tropical Red Sea coral, Stylophora pistillata, and on a temperate Mediterranean symbiotic coral Balanophyllia europaea. The gene expression profiles revealed a strong effect of both temperature increase and pH decrease implying for synergism response. The temperate coral, exposed to a twice as high range of seasonal temperature fluctuations than the Red Sea species, faced stress more effectively. The compensatory strategy for coping apparently involves deviating cellular resources into a massive up-regulation of genes in general, and specifically of genes involved in the generation of metabolic energy. Our results imply that sub-lethal, prolonged exposure to stress can stimulate evolutionary increase in stress resilience.
人为引起的大气 CO 增加导致了全球变暖和海洋酸化，这使得人们对珊瑚（主要的碳酸盐生物矿化剂）的未来产生了严重的担忧。在这里，我们使用转录组分析来研究长期逐渐升温（年增长率）与降低 pH 值对亚热带红海珊瑚 Stylophora pistillata 和温带地中海共生珊瑚 Balanophyllia europaea 的影响。基因表达谱显示，温度升高和 pH 值降低都有强烈的影响，暗示存在协同反应。与红海物种相比，生活在温度季节性波动高二倍环境中的温带珊瑚能更有效地应对压力。显然，这种补偿策略涉及将细胞资源转移到基因的大规模上调，特别是与代谢能量生成相关的基因。我们的研究结果表明，亚致死、长期的应激暴露可以刺激应激适应能力的进化增加。
