Plant Hormones

Question 1

What does auxin do in the roots and shoots?

Answer 1

It the roots it inhibits growth, in the shoots it promotes it.

Question 2

How does phototropism work?

Answer 2

More auxin accumulates in the shaded region, causing the shaded region to elongate more quickly, causing the shoot to bend towards the light.

Question 3

Explain gravitropism in a side wards shoot.

Answer 3

> there is always more auxin in the lower side of the shoot, causing the lower side to grow more quickly

> the shoot bends upwards

Question 4

Explain gravitropism in a side wards root.

Answer 4

> gravity always causes an accumulation of auxin in the lower side of the root.

> this inhibits the growth of the lower side, causing the root to bend downwards.

Question 5

How do roots grow towards moisture?

Answer 5

Auxin accumulates in the side with more moisture, inhibiting the growth in this side and causing the root to bend towards the moisture.

Question 6

Where is auxin produced?

Answer 6

> in the tips of the roots and shoots.