5.18 - Plant Hormones (Commercial Uses)

• How are auxins used commercially?

  • Stimulates plant growth, helps clone plants, grow from cuttings
  • Use them to kill weeds
• How is Gibberellin used commercially?

  • Controlling dormancy - induced germination in plants
  • Inducing flowering - encourages to make more and larger flowers
  • Growing larger fruit
• How is ethene used commercially?

  • Stimulate the ripening of fruit - pick fruit before it is ripe, ship it, then expose to Ethene to ripen for sales.
• Name three plant hormones

  Auxin

  Gibberellin

  Ethene
• What are three uses of auxins in agriculture and horticulture?

  In weedkillers, rooting powders and to promote growth in tissue culture
• How do auxins get used for weed killers? 


  Stimulates too much growth, disrupts growth process and so kills the plant