Respiration in Azotobacter vinelandii and its relationship with the synthesis of biopolymers

Tania Castillo, Andrés García, Claudio Padilla-Córdova, ALVARO ENRIQUE DIAZ BARRERA, Carlos Peña

Research output: Contribution to journalReview articlepeer-review

2 Scopus citations

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, García A, Padilla-Córdova 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

Original languageEnglish
Pages (from-to)36-45
Number of pages10
JournalElectronic Journal of Biotechnology
Volume48
DOIs
StatePublished - Nov 2020
Externally publishedYes

Keywords

  • Alginate
  • Azotobacter vinelandii
  • Biopolymers
  • Gram-negative
  • Nitrogen fixation
  • Oxygen
  • PHB
  • poly(3-hydroxybutyrate)
  • Respiration
  • Soil bacterium

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