Plant hormones

Cards (12)

  • What is the process called when plant shoots grow towards light?
    Phototropism
  • What do scientists believe controls phototropism in plants?
    Plant hormones
  • What is the name of the hormone produced at the tips of shoots?
    Auxin
  • What happens to shoots when their tips are removed?
    They do not grow towards the light
  • What effect does covering the tips of shoots with foil have?
    They do not grow towards the light
  • What does covering the lower parts of shoots with foil indicate?
    Lower parts are not sensitive to light
  • How do auxins help shoots grow towards light?
    • Auxins produced at the tip
    • Concentrate on the darker side
    • Cells on darker side grow faster
    • Causes shoot to bend towards light
  • What is the term for plant roots growing towards gravity?
    Gravitropism
  • How do auxins behave in roots under gravity?
    They inhibit cell growth on the lower side
  • What are the roles of gibberellins and ethylene in plants?
    • Gibberellins: Start seed germination
    • Ethylene: Controls cell division and fruit ripening
  • What should higher-tier students know about plant hormones?
    Gibberellins and ethylene roles
  • Why is it important to learn about plant hormones for exams?
    They are frequently tested topics