plant hormones

Cards (19)

  • where is auxin fount in a plant
    in the tips of stems and roots
  • auxin
    a plant hormone
  • what does auxin do
    controls plant growth in response to light and gravity
  • what is plant growth in response to light called
    phototropism
  • what is plant growth in response to gravity called
    gravitropism
  • when shoots are exposed the light, which side will accumulate more auxin
    shaded side
  • Roots show ______ phototropism
    Negative
  • Shoots show ______ phototropism
    Positive
  • Roots show ______ gravitropism
    Positive
  • Shoots show ______ gravitropism
    Negative
  • Why do plant produce hormones
    For growth responses towards stumuli
  • How do plant hormones travel from the site of production to the site of action
    Diffusion
  • Auxin in the tips of shoots stimulate growth
  • Auxin in the tips of roots inhibit growth
  • How do auxin cause a plant to bent towards light
    Accumulates on the shaded side which stimulates growth and it bends to the light
  • what can auxins be used for
    killing weeds
    growing from cutting with rooting powder
    growing cells in tissue culture
  • what can gibberellin be used for
    controlling dormancy - lots of seeds won't germinate unless they've been through certain conditions
    inducing flowering - cause plants to flower
    growing larger fruits - seedless variations of fruit often do not grow as large as a seeded variation
  • Gibberellin
    A plant hormone
  • what can ethene be used for

    fruit ripening - ethene is a gas that stimulates enzymes that cause fruit to ripen. this means that fruit can be picked while it's still unripe then gas is added on the way to the supermarket so it will be perfect as it reaches the shelves