Uses of plant hormones

• What is the role of gibberellins in seed germination?

  Initiating seed germination
• What does the chemical ethylene control in plants?

  Cell division and ripening of food
• What are the main uses of auxins in agriculture and horticulture?

  • Weed killers in gardens
  • Rooting powders for cuttings
  • Promoting growth in tissue culture
• How are auxins used as weed killers?

  They kill unwanted plants in gardens
• What is the purpose of rooting powders that contain auxins?

  To promote root growth in cuttings
• How do auxins contribute to tissue culture?

  They promote growth in tissue culture
• What are the uses of gibberellins in agriculture?

  • Ending seed dormancy
  • Encouraging plants to flower
  • Making food grow larger
• What effect do gibberellins have on seed dormancy?

  They can end seed dormancy
• How do gibberellins affect flowering in plants?

  They encourage plants to flower
• What is the effect of gibberellins on the size of food?

  They make food grow larger
• How is ethylene used in the food industry?

  To trigger ripening of harvested fruits
• Why are bananas harvested before they ripen?

  To transport them long distances
• What happens to bananas just before they are sold?

  Ethylene triggers them to ripen