B3.2.6- plant hormones

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6 Terms

1
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what is phototropism

growing towards the light

2
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what is gravitropism

growing in same direction of gravity

3
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what are the roots are shoots of a plant

Root- below the germinating seed that grows positively gravitropic

Shoots- above the germinating seed that grows positively phototropic

4
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what is Auxin

Plant hormone that allows plant to grow towards or away from plant stimulus

5
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what is the role of Auxin in a plant 4

  1. released at tip of shoot or root and diffuses downwards

  2. Auxin stimulates cell elongation

  3. Auxin accumulates on shaded side of plant

  4. if light is on diagonal to sun then plant will bend towards the light

6
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what happens when auxin is on the root and shoot of a germinating seed 4

  1. the Auxin accumulates on lower side of root and shoot

  2. As Auxin stimulates cell elongation, the roots and shoots will grow and bend

  3. And as Roots are positively gravitropic, they will grow in the direction of gravity

  4. And as shoots are positively Phototropic, they will grow towards the light and upwards.