Plant Responses
All living organisms are sensitive to changes intheir surroundings.Plants are sensitive to light, moisture and gravity.The...
All living organisms are sensitive to changes intheir surroundings.Plants are sensitive to light, moisture and gravity.The...
All living organisms are sensitive to changes intheir surroundings.Plants are sensitive to light, moisture and gravity.The...
All living organisms are sensitive to changes intheir surroundings.Plants are sensitive to light, moisture and gravity.The...
•Shoots grow upwards - towards light and against the force ofgravity.•Roots grow downwards – towards moisture and in the d...
Phototropism and Auxin
Geotropism and Auxin
Geotropism and Auxin
Commercial Uses of Hormones
Commercial Uses of Hormones1. Rooting powder contains auxin.It is applied to cuttings to stimulate the growth of roots.Lar...
Commercial Uses of Hormones1. Rooting powder contains auxin.It is applied to cuttings to stimulate the growth of roots.Lar...
Commercial Uses of Hormones1. Rooting powder contains auxin.It is applied to cuttings to stimulate the growth of roots.Lar...
Plant responses
Plant responses
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Plant responses

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Plant responses

  1. 1. Plant Responses
  2. 2. All living organisms are sensitive to changes intheir surroundings.Plants are sensitive to light, moisture and gravity.The response to light is called ______________.The response to gravity is called ___________.The response to moisture is called ___________.
  3. 3. All living organisms are sensitive to changes intheir surroundings.Plants are sensitive to light, moisture and gravity.The response to light is called phototropism.The response to gravity is called ___________.The response to moisture is called ___________.
  4. 4. All living organisms are sensitive to changes intheir surroundings.Plants are sensitive to light, moisture and gravity.The response to light is called phototropism.The response to gravity is called geotropism.The response to moisture is called ___________.
  5. 5. All living organisms are sensitive to changes intheir surroundings.Plants are sensitive to light, moisture and gravity.The response to light is called phototropism.The response to gravity is called geotropism.The response to moisture is called hydrotropism.
  6. 6. •Shoots grow upwards - towards light and against the force ofgravity.•Roots grow downwards – towards moisture and in the direction ofthe force of gravity.
  7. 7. Phototropism and Auxin
  8. 8. Geotropism and Auxin
  9. 9. Geotropism and Auxin
  10. 10. Commercial Uses of Hormones
  11. 11. Commercial Uses of Hormones1. Rooting powder contains auxin.It is applied to cuttings to stimulate the growth of roots.Large numbers of plants can be produced quickly, so more money canbe made.
  12. 12. Commercial Uses of Hormones1. Rooting powder contains auxin.It is applied to cuttings to stimulate the growth of roots.Large numbers of plants can be produced quickly, so more money canbe made.2. Hormones control fruit ripening.Producers use chemicals to slow down the ripening of fruits, such asbananas, during transport.Just before sale, ripening can then be speeded up using differentchemicals and a warmer temperature in the storerooms.
  13. 13. Commercial Uses of Hormones1. Rooting powder contains auxin.It is applied to cuttings to stimulate the growth of roots.Large numbers of plants can be produced quickly, so more money canbe made.2. Hormones control fruit ripening.Producers use chemicals to slow down the ripening of fruits, such asbananas, during transport.Just before sale, ripening can then be speeded up using differentchemicals and a warmer temperature in the storerooms.3. Weedkillers contain synthetic hormones that stimulate the plants togrow very rapidly.Their normal growth patterns are disrupted.They become tall and spindly, and eventually die.
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