Plant hormones

• What is auxin's role in plants?

  Control plant growth at shoots and roots
• How do auxins move within the plant?

  They dissolve in cell solution and diffuse backwards
• What effect do auxins have on shoots?

  They stimulate growth
• What effect do auxins have on roots?

  They inhibit growth
• Where do auxins accumulate in response to light?

  On the shaded and lower side
• What is phototropism in shoots?

  • Shoots grow towards light
  • Negatively geotropic (grow away from ground)
• How do shoots respond to gravity?

  They curve towards the sun
• How do auxins affect the growth of shoots in response to light?

  Auxins accumulate on the shaded side, stimulating growth
• What is gravitropism in shoots?

  • Shoots curve upwards
  • Auxins accumulate on the lower side
• How do roots respond to light?

  They grow away from light
• What happens to auxins in roots when exposed to light?

  They accumulate on the lower side, inhibiting growth
• What is gravitropism in roots?

  • Roots curve downwards
  • Auxins accumulate on the lower side, inhibiting growth
• How do auxins affect the growth of roots in response to gravity?

  Auxins accumulate on the lower side, inhibiting growth