Abstract
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.
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Ivanova, E.G., Doronina, N.V. & Trotsenko, Y.A. Aerobic Methylobacteria Are Capable of Synthesizing Auxins. Microbiology 70, 392–397 (2001). https://doi.org/10.1023/A:1010469708107
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DOI: https://doi.org/10.1023/A:1010469708107