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Text File  |  1992-09-02  |  425b  |  11 lines
  1. A substance produced by a plant which has a
  2. marked effect on its growth, flowering,
  3. leaf-fall, fruit-ripening, or some other
  4. process. Examples include auxin, gibberellin,
  5. ethylene, and cytokin. Unlike animal
  6. hormones, these substances are not produced
  7. by a particular area of the plant body and
  8. they may be less specific in their effects.
  9. It has therefore been suggested that they
  10. should not be described as hormones at all.
  11.