Plant Hormones - Uses of Auxin, Gibberellin and Ethene

• What are the three plant hormones discussed in the video?

  Auxin, gibberellin, and ethylene
• What is the primary function of auxin in plants?


  It stimulates plants to grow
• How can auxin be used in tissue culture?


  By adding auxin to the growth medium to stimulate growth
• What happens when cuttings are treated with auxin powder?


  They produce roots and grow into new plants
• How does auxin function as a weed killer?


  By disrupting a plant's growth patterns at high concentrations
• What type of plants are most commercial crops, and how does this relate to weed killers?


  Most commercial crops are narrow-leaved, allowing selective weed killers to target broad-leaved weeds
• What are the three main uses of gibberellin?


  Controlling dormancy, inducing flowering, and growing larger fruit
• What is dormancy in seeds?


  It is the period before growth starts when conditions are not right
• How can farmers use gibberellin to increase crop yield?


  By inducing germination at times when it wouldn't normally happen
• How does gibberellin affect flowering in plants?


  It can induce flowering on demand and encourage more or larger flowers
• How does gibberellin help with seedless fruit varieties?


  It ensures that their fruits grow larger
• What is the primary use of ethylene in plants?


  To stimulate the ripening of fruit
• Why is controlling the ripening process of fruit important?

  It allows for better transport and sale of fruit
• How do farmers use ethylene during the transportation of fruit?


  By exposing fruit to ethylene after transport to induce ripening
• How does ethylene work at the cellular level to ripen fruit?


  It stimulates an enzyme that causes the fruit to ripen
• What are the commercial uses of auxin, gibberellin, and ethylene in agriculture?

  • Auxin:
  • Stimulates growth
  • Used in tissue culture and cuttings
  • Acts as a selective weed killer
  • Gibberellin:
  • Controls dormancy
  • Induces flowering
  • Promotes larger fruit growth
  • Ethylene:
  • Stimulates fruit ripening