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Table 3 Identification by ultrahigh-performance liquid chromatography-high-resolution mass spectrometry (UHPLC-HRMS/MS) of phytohormones produced by A. brasilense strains Ab-V5 and Ab-V6 after 14 days of growth on DYGS medium supplemented or not with tryptophan (TRP, 500 µg mL−1)

From: Phytohormones and induction of plant-stress tolerance and defense genes by seed and foliar inoculation with Azospirillum brasilense cells and metabolites promote maize growth

Treatment IAAa IBA TOL ILA IPyA IPA Kin GA3 JA SA
Ab-V5 +b + + * * +
Ab-V5 + TRP + + + * +
Ab-V6 + + + +
Ab-V6 +TRP + + + * +
  1. aIndole-3-acetic acid (IAA), indole-3-butyric acid (IBA), indole-3-ethanol (TOL), indole-3-lactic acid (ILA), indole-3-pyruvic (IPyA), indole-3-propionic acid (IPA), kinetin (Kin), gibberellic acid (GA3), jasmonic acid (JA), salicylic acid (SA)
  2. b+ detected; − no detected; * low relation