Plant hormones - shoots Flashcards Preview

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Flashcards in Plant hormones - shoots Deck (11):
1

What do hormones make sure plants do?

Grow in useful directions

2

What is the plant growth hormone called?

Auxin

3

Where does auxin control growth? (2 places)

Near the tips of SHOOTS and ROOTS

4

What are the 3 things auxin responds to when controlling the plant's growth?

1. Phototropism (LIGHT)

2. Gravitropism or geotropism (GRAVITY)

3. Moisture

(think: what are the 'tropes' of the controlling powers?)

5

Why does auxin move backwards in the tips?

To stimulate the cell elongation process

6

Where does the cell elongation process occur?

Just behind the tips (of the shoots or roots)

7

What happens if the tip of a shoot is removed?

No auxin is available and the shoot may STOP growing

8

How does auxin affect a plant's shoots?

It promotes growth there

9

Do shoots grow towards or away from light?

Towards

10

When a shoot is exposed to light does more auxin accumulate on the side that's:

a) in the shade?
or
b) in the light?

a) iIn the SHADE

11

What does a higher accumulation of auxin in the shaded side of the shoot mean?

That the auxin makes the cells grow (elongate) faster on the shaded side, so the shoot bends TOWARDS the light