Abstract Azotobacter vinelandii is a gram-negative soil bacterium that produces two biopolymers of biotechnological interest, alginate and poly(3-hydroxybutyrate), and it has been widely studied because of its capability to fix nitrogen even in the presence of oxygen. This bacterium is characterized by its high respiration rates, which are almost 10-fold higher than those of Escherichia coli and are a disadvantage for fermentation processes. On the other hand, several works have demonstrated that adequate control of the oxygen supply in A. vinelandii cultivations determines the yields and physicochemical characteristics of alginate and poly(3-hydroxybutyrate). Here, we summarize a review of the characteristics of A. vinelandii related to its respiration systems, as well as some of the most important findings on the oxygen consumption rates as a function of the cultivation parameters and biopolymer production. How to cite: Castillo T, Garcia A, Padilla-Cordova C, et al. Respiration in Azotobacter vinelandii and its relationship with the synthesis of biopolymers. Electron J Biotechnol 2020;48. https://doi.org/10.1016/j.ejbt.2020.08.001

中文翻译：

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维氏固氮菌的呼吸作用及其与生物聚合物合成的关系

摘要 Azotobacter vinelandii 是一种革兰氏阴性土壤细菌，可产生两种具有生物技术意义的生物聚合物，藻酸盐和聚（3-羟基丁酸盐），由于其即使在有氧的情况下也能固氮，因此已被广泛研究。这种细菌的特点是呼吸速率高，几乎是大肠杆菌的 10 倍，不利于发酵过程。另一方面，一些研究表明，在 A. vinelandii 栽培中对氧气供应的充分控制决定了藻酸盐和聚（3-羟基丁酸盐）的产量和理化特性。在这里，我们总结了 A. vinelandii 与其呼吸系统相关的特征，以及关于作为培养参数和生物聚合物生产函数的耗氧率的一些最重要的发现。如何引用：Castillo T、Garcia A、Padilla-Cordova C 等。维氏固氮菌的呼吸作用及其与生物聚合物合成的关系。电子 J 生物技术 2020；48。https://doi.org/10.1016/j.ejbt.2020.08.001