#phytohormone__plant_hormone__planthormone__growth_regulator  a hormone-like plant product
  supertype:  #plant_product__plantproduct  a product made from plant material
  subtype:  #auxin  a plant hormone that promotes root formation and bud growth
     subtype:  #indoleacetic_acid__IAA  a plant hormone promoting elongation of stems and roots
     subtype:  #indolebutyric_acid__indolebutyricacid  a synthetic plant hormone promoting elongation of stems and roots
  subtype:  #gibberellin  a plant hormone isolated from a fungus; used in promoting plant growth
     subtype:  #gibberellic_acid__gibberellicacid  a crystalline acid associated with gibberellin

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