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首页> 外文期刊>Journal of Hazardous Materials >Salt tolerance mechanism of a hydrocarbon-degrading strain: Salt tolerance mediated by accumulated betaine in cells
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Salt tolerance mechanism of a hydrocarbon-degrading strain: Salt tolerance mediated by accumulated betaine in cells

机译：烃降解菌株的耐盐机理：细胞中累积甜菜碱介导的耐盐性

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摘要

Rhodococcus sp. HX-2 could degrade diesel oil in the presence of 1%-10 % NaCl. The compatible solute betaine accumulated in cells with increasing NaCl concentration, and this was found to be the main mechanism of resistance of HX-2 to high salt concentration. Exogenously added betaine can be transported into cells, which improved cell growth and the percentage degradation of diesel oil in the presence of high [NaCl] in solution and in soil. Scanning electron microscopy data suggested that addition of exogenous betaine facilitated salt tolerance by stimulating exopolysaccharide production. Fourier-transform infrared analysis suggested that surface hydroxyl, amide and phosphate groups may be related to tolerance of high-salt environments. Four betaine transporter-encoding genes (H0, H1, H3, H5) and the betaine producer gene betB were induced in Rhodococcus sp. HX-2 by NaCl stress. The maximal induction of H0, H1, H3 and H5 transcription depended on high salinity plus the presence of betaine. These results demonstrate that salt tolerance is mediated by accumulated betaine in Rhodococcus sp. HX-2 cells, and the potential of this strain for application in bioremediation of hydrocarbon pollution in saline environments.
机译：rhodococcus sp。 HX-2可以在1％-10％NaCl存在下降解柴油。在细胞中累积的相容性溶质甜菜碱随着NaCl浓度的增加，并且发现其是HX-2对高盐浓度的主要机理。外源性添加的甜菜碱可以传送到细胞中，这在溶液和土壤中存在高[NaCl]存在的细胞生长和柴油的百分比降解。扫描电子显微镜数据表明，通过刺激外偶糖产生，添加外源性甜菜碱的促进耐盐性。傅里叶变换红外分析表明，表面羟基，酰胺和磷酸盐基团可能与高盐环境的耐受性有关。在Rhodococcus Sp中诱导四种甜菜碱转运蛋白编码基因（H0，H1，H3，H5）和甜菜碱生产者基因Betb。 HX-2通过NaCl应力。 H0，H1，H3和H5转录的最大诱导依赖于高盐度加上甜菜碱的存在。这些结果表明，耐溶于rhodococcus sp的累积甜菜碱介导的耐盐性。 HX-2细胞，以及该菌株的潜力用于盐水环境中烃污染生物化。

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  • 来源
    《Journal of Hazardous Materials》 |2020年第15期|122326.1-122326.13|共13页
  • 作者

    Hu Xin; Li Dahui; Qiao Yue; Song Qianqian; Guan Zhiguo; Qiu Kaixuan; Cao Jiachang; Huang Lei;

  • 作者单位

    Tianjin Univ Technol Coll Chem & Chem Engn Tianjin Key Lab Organ Solar Cells & Photochem Con Tianjin Key Lab Drug Targeting & Bioimaging Tianjin 300384 Peoples R China;

    Tianjin Univ Technol Coll Chem & Chem Engn Tianjin Key Lab Organ Solar Cells & Photochem Con Tianjin Key Lab Drug Targeting & Bioimaging Tianjin 300384 Peoples R China;

    Tianjin Univ Technol Coll Chem & Chem Engn Tianjin Key Lab Organ Solar Cells & Photochem Con Tianjin Key Lab Drug Targeting & Bioimaging Tianjin 300384 Peoples R China;

    Tianjin Univ Technol Coll Chem & Chem Engn Tianjin Key Lab Organ Solar Cells & Photochem Con Tianjin Key Lab Drug Targeting & Bioimaging Tianjin 300384 Peoples R China;

    Tianjin Univ Technol Coll Chem & Chem Engn Tianjin Key Lab Organ Solar Cells & Photochem Con Tianjin Key Lab Drug Targeting & Bioimaging Tianjin 300384 Peoples R China;

    Tianjin Univ Technol Coll Chem & Chem Engn Tianjin Key Lab Organ Solar Cells & Photochem Con Tianjin Key Lab Drug Targeting & Bioimaging Tianjin 300384 Peoples R China;

    Tianjin Univ Technol Coll Chem & Chem Engn Tianjin Key Lab Organ Solar Cells & Photochem Con Tianjin Key Lab Drug Targeting & Bioimaging Tianjin 300384 Peoples R China;

    Tianjin Univ Technol Coll Chem & Chem Engn Tianjin Key Lab Organ Solar Cells & Photochem Con Tianjin Key Lab Drug Targeting & Bioimaging Tianjin 300384 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Hydrocarbon-degrading; Rhodococcus sp.; Betaine; Salt tolerance mechanism; Transcriptional analysis;

    机译：碳氢化合物降解;rhodococcus sp。;甜菜碱;耐盐机制;转录分析;

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