细菌在逆境条件下膜脂肪酸变化的研究进展

Advances in Changes of Membrane Fatty Acids of Bacteria under Adverse Conditions

细胞膜是控制细菌细胞进行物质交换的屏障。在逆境条件下,细菌通过改变细胞膜脂肪酸的组分和含量,以调整适当的膜流动性和适应性,保护细胞膜免受不利和多变逆境条件的影响。有些细菌在逆境胁迫的条件下会进入活的但不可培养的(Viable but non-culturable, VBNC)状态。总结了细菌几种逆境胁迫及其诱导因子,并论述了细菌和部分具有VBNC态细菌在逆境胁迫下膜脂肪酸的种类及含量的变化、以及脂肪酸检测方法的研究进展,为进一步解析细菌逆境胁迫机制提供参考。

Cell membranes of bacteria are barrier for controlling the exchange of substances in cells. Under adverse conditions, bacteria could adjust membrane fluidity and adaptability by changing the composition and content of membrane fatty acids, so as to protect them from adverse and changeable conditions. Some bacteria could enter into Viable but non-culturable(VBNC) state under adverse conditions. In this paper, several factors of bacteria under adversity, coercion as well as induction were summarized, and the changes of types and contents of membrane fatty acids of bacteria and some bacteria with VBNC state under adverse coercion and the advances in fatty acid detection methods were discussed. It lays foundation for further analyzing the coercion mechanism of bacteria under adversity.