, Volume 70, Issue 4, pp 392–397 | Cite as

Aerobic Methylobacteria Are Capable of Synthesizing Auxins

  • E. G. Ivanova
  • N. V. Doronina
  • Yu. A. Trotsenko


Obligately and facultatively methylotrophic bacteria with different pathways of C1 metabolism were found to be able to produce auxins, particularly indole-3-acetic acid (IAA), in amounts of 3–100 μg/ml. Indole-3-pyruvic acid and indole-3-acetamide were detected only in methylobacteria with the serine pathway of C1 metabolism (Methylobacterium mesophilicumand Aminobacter aminovorans).The production of auxins by methylobacteria was stimulated by the addition of L-tryptophan to the growth medium and was inhibited by ammonium ions. The methylobacteria under study lacked tryptophan decarboxylase and tryptophan side-chain oxidase. At the same time, they were found to contain several aminotransferases. IAA is presumably synthesized by methylobacteria through indole-3-pyruvic acid.

aerobic methylotrophic bacteria Methylobacterium Aminobacter Methylovorus Paracoccus auxins indole-3-acetic acid 


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© MAIK “Nauka/Interperiodica” 2001

Authors and Affiliations

  • E. G. Ivanova
    • 1
  • N. V. Doronina
    • 1
  • Yu. A. Trotsenko
    • 1
  1. 1.Skryabin Institute of Biochemistry and Physiology of Microorganisms, Russian Academy of SciencesPushchino, Moscow oblastRussia

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