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首页> 外文期刊>Archives of microbiology >Hydroxy-Al and cell-surface negativity are responsible for the enhanced sensitivity of Rhodotorula taiwanensis to aluminum by increased medium pH
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Hydroxy-Al and cell-surface negativity are responsible for the enhanced sensitivity of Rhodotorula taiwanensis to aluminum by increased medium pH

机译：羟基-A1和细胞表面消极性负责通过增加的培养基pH增强rhodotorula taiwanensis对铝的敏感性

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摘要

Aluminum (Al) is ubiquitous and toxic to microbes. High Al3+ concentration and low pH are two key factors responsible for Al toxicity, but our present results contradict this idea. Here, an Al-tolerant yeast strain Rhodotorula taiwanensis RS1 was incubated in glucose media containing Al with a continuous pH gradient from pH 3.1-4.2. The cells became more sensitive to Al and accumulated more Al when pH increased. Calculations using an electrostatic model Speciation Gouy Chapman Stern indicated that, the increased Al sensitivity of cells was associated with AlOH2+ and Al(OH) (2) (+) rather than Al3+. The alcian blue (a positively charged dye) adsorption and zeta potential determination of cell surface indicated that, higher pH than 3.1 increased the negative charge and Al adsorption at the cell surface. Taken together, the enhanced sensitivity of R. taiwanensis RS1 to Al from pH 3.1-4.2 was associated with increased hydroxy-Al and cell-surface negativity.
机译：铝（Al）对微生物无处不存在和毒性。 高Al3 +浓度和低pH是负责Al毒性的两个关键因素，但我们现在的结果与这种想法相矛盾。 这里，将耐植物酵母菌菌株rhodotorula Taiwancais rs1在含有的葡萄糖培养基中孵育，该葡萄糖培养基与来自pH3.1-4.2的连续pH梯度孵育。 当pH增加时，细胞对Al和累积更多的Al变得更敏感。 使用静电模型形态粗糙查普曼船尾的计算表明，细胞的增加的Al敏感性与AlOh2 +和Al（2）（+）而不是Al3 +相关。 Alcian蓝（带正电荷的染料）吸附和Zeta电位测定的细胞表面表明，较高的pH比3.1增加了细胞表面的负电荷和Al吸附。 连胜，从pH3.1-4.2从pH 3.1-4.2中增强R. Taiwanensis Rs1至Al的敏感性与羟基-A1增加的羟基和细胞表面消极。

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  • 来源
    《Archives of microbiology》 |2017年第8期|共10页
  • 作者

    Zhao Xue Qiang; Bao Xue Min; Wang Chao; Xiao Zuo Yi; Hu Zhen Min; Zheng Chun Li; Shen Ren Fang;

  • 作者单位

    Chinese Acad Sci Inst Soil Sci State Key Lab Soil &

    Sustainable Agr Nanjing 210008 Jiangsu;

    Chinese Acad Sci Inst Soil Sci State Key Lab Soil &

    Sustainable Agr Nanjing 210008 Jiangsu;

    Chinese Acad Sci Inst Soil Sci State Key Lab Soil &

    Sustainable Agr Nanjing 210008 Jiangsu;

    Inner Mongolia Univ Sci &

    Technol Sch Environm &

    Energy Baotou 014010 Peoples R China;

    Chinese Acad Sci Inst Soil Sci State Key Lab Soil &

    Sustainable Agr Nanjing 210008 Jiangsu;

    Chinese Acad Sci Inst Soil Sci State Key Lab Soil &

    Sustainable Agr Nanjing 210008 Jiangsu;

    Chinese Acad Sci Inst Soil Sci State Key Lab Soil &

    Sustainable Agr Nanjing 210008 Jiangsu;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 微生物学;
  • 关键词

    Aluminum; Speciation; pH; Yeast; Electrical potential;

    机译：铝;形态;pH;酵母;电势;

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