Plant Hormones - Commercial Uses

• Which of the following are plant hormones?

  • Gibberellin 
  • Auxin
  • Ethene
• What are auxins?

  A family of plant hormones
• What are three uses of auxins in agriculture and horticulture?

  In weedkillers, rooting powders and to promote growth in tissue culture
• Auxins stimulate cells to grow and divide, so how can they be used as weedkillers?

  If large amount of auxins are added to plants, it can disrupt their growth process by overstimulating them. This can kill the plant.
• What is the benefit of selective weedkillers?

  They kill some plants but not all
•  describe dormancy?

  Seeds are inactive and do not grow or develop
• Which option below is describing the process of germination?

  Seeds begin to develop and grow
• Which plant hormone can stimulate a plant to geminate?

  Gibberellin
• Which hormone is responsible for inducing fruit to ripen?

  Ethene
• Explain how ethene is used in the transport of food. 

  • Ethene stimulates fruit to ripen
  • Fruit is picked unripe so that it's still hard
  • which means it isn't damaged during transport or storage 
  • Ethene can then be used to ripen the fruit so that it's soft for consumers