Plant Growth Regulation

, Volume 43, Issue 1, pp 93–96 | Cite as

Indole-3-acetic acid production by pink-pigmented facultative methylotrophic bacteria

  • Z.S. OmerEmail author
  • R. Tombolini
  • A. Broberg
  • B. Gerhardson


In examining the presence of indole-3-acetic acid (IAA) in supernatants of pink-pigmented facultativemethylotrophic (PPFMs) bacterial cultures, three out of the 16 isolates tested showed a positive reaction ina colorimetric assay. The presence was further unambiguously con?rmed by high-performance liquidchromatography in combination with NMR. The IAA production was signi?cantly stimulated byL-tryptophan. These results prove that PPFM bacteria are able to produce the plant hormone IAA.

Auxin HPLC L-tryptophan Methylobacterium 


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Copyright information

© Kluwer Academic Publishers 2004

Authors and Affiliations

  • Z.S. Omer
    • 1
    Email author
  • R. Tombolini
    • 1
  • A. Broberg
    • 2
  • B. Gerhardson
    • 1
  1. 1.Plant Pathology and Biocontrol UnitUppsalaSweden
  2. 2.Department of ChemistrySLUUppsalaSweden

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