Abstract An increase in the atmospheric concentration of methane greenhouse gas results in an increase in global warming, surface water evaporation, and amount of the solutes in relevant areas besides, it also causes climate change. In these situations, methanotrophs that are resistant to climate change and deserted conditions could be applied. Methylococcus, as one of the most extensively studied methanotrophs is highly resistant to salinity, a strain of which was isolated in this study from Hoz-e Soltan Salt Lake in Iran as an example influenced by climate change. Isolated strain was identified. To determine the ability of the bacteria for decrease of methane gas, the culture medium was analyzed by gas chromatography. Results showed that isolated strain is able to grow in salt proportion of 3.3% and acidic pH of 3.5 in vitro, reducing more than 75% of total methane gas within 10 days. In addition to nitrogen fixation ability of the strain, positive results obtained regarding drought tolerance and heat shock in this study confirmed that Methylococcus strains may be able to withstand environmental conditions of foreseeable future. Thus, to prevent methane emission in regions such as Hoz-e Soltan Salt Lake in Iran, more compatible methanotroph strains need to be identified and used.

中文翻译：

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分离耐异常气候变化的甲基球菌菌株以减少伊朗盐湖的甲烷排放

摘要 大气中甲烷温室气体浓度的增加导致全球变暖、地表水蒸发和相关地区溶质量增加，同时也引起气候变化。在这些情况下，可以应用对气候变化和荒凉条件具有抵抗力的甲烷氧化菌。甲基球菌作为研究最广泛的甲烷氧化菌之一，对盐分具有高度抗性，本研究中从伊朗的 Hoz-e Soltan 盐湖中分离出一种菌株，作为受气候变化影响的一个例子。鉴定了分离的菌株。为了确定细菌减少甲烷气体的能力，通过气相色谱分析培养基。结果表明，分离菌株能够在3.3%的盐分比例和3.5的酸性pH值条件下体外生长，在 10 天内减少甲烷气体总量的 75% 以上。除了该菌株的固氮能力外，本研究中关于耐旱性和热休克的积极结果证实，甲基球菌菌株可能能够承受可预见的未来环境条件。因此，为了防止伊朗 Hoz-e Soltan 盐湖等地区的甲烷排放，需要识别和使用更兼容的甲烷氧化菌菌株。