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首页> 外文期刊>Cellular Physiology and Biochemistry >Sea Water Acidification Affects Osmotic Swelling, Regulatory Volume Decrease and Discharge in Nematocytes of the Jellyfish Pelagia noctiluca
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Sea Water Acidification Affects Osmotic Swelling, Regulatory Volume Decrease and Discharge in Nematocytes of the Jellyfish Pelagia noctiluca

机译：海水酸化影响水母夜蛾的神经细胞的渗透性膨胀，调节体积的减少和释放

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Background: Increased acidification/PCO2 of sea water is a threat to the environment and affects the homeostasis of marine animals. In this study, the effect of sea water pH changes on the osmotic phase (OP), regulatory volume decrease (RVD) and discharge of the jellyfish Pelagia noctiluca (Cnidaria, Scyphozoa) nematocytes, collected from the Strait of Messina (Italy), was assessed. Methods: Isolated nematocytes, suspended in artificial sea water (ASW) with pH 7.65, 6.5 and 4.5, were exposed to hyposmotic ASW of the same pH values and their osmotic response and RVD measured optically in a special flow through chamber. Nematocyte discharge was analyzed in situ in ASW at all three pH values. Results: At normal pH (7.65), nematocytes subjected to hyposmotic shock first expanded osmotically and then regulated their cell volume within 15 min. Exposure to hyposmotic ASW pH 6.5 and 4.5 compromised the OP and reduced or totally abrogated the ensuing RVD, respectively. Acidic pH also significantly reduced the nematocyte discharge response. Conclusion: Data indicate that the homeostasis and function of Cnidarians may be altered by environmental changes such as sea water acidification, thereby validating their use as novel bioindicators for the quality of the marine environment.
机译：背景：海水酸化/ P CO2 的增加对环境构成威胁，并影响海洋动物的体内平衡。在这项研究中，海水pH值变化对从墨西拿海峡（意大利）收集的水母夜蛾念珠菌（Cnidaria，Scyphozoa）线虫的渗透相（OP），调节量减少（RVD）和排放的影响是评估。方法：将悬浮在pH 7.65、6.5和4.5的人工海水（ASW）中的分离的神经细胞暴露于相同pH值的低渗ASW，并在特殊的流通室中光学测量其渗透反应和RVD。在所有三个pH值下，在ASW中就地分析了神经细胞放电。结果：在正常pH（7.65）下，遭受低渗性休克的神经细胞首先渗透性扩张，然后在15分钟内调节其细胞体积。暴露于低渗透性的ASW pH 6.5和4.5分别损害了OP，并降低了或完全消除了随之而来的RVD。酸性pH也显着降低了神经细胞放电反应。结论：数据表明，由于海水酸化等环境变化，可能会改变人的稳态和功能，从而验证了其作为海洋环境质量的新型生物指标的用途。

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