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Flashcards in Plant hormones - roots Deck (17):
1

How does auxin affect growth in a plant's ROOTS?

Auxin INHIBITS growth in the roots

In this way it has the OPPOSITE effect as in the shoots

2

What does auxin control in terms of root growth?

The direction of growth

In this way it has the SAME effect as in the shoots

3

Do roots grow towards or away from gravity?

TOWARDS

4

Will a shoot growing sideways have more auxin on its upper or lower side?

Its LOWER side

5

Why will a shoot growing sideways have more auxin on its lower side?

Because of gravity pulling it downwards

6

Do roots grow towards or away from moisture?

TOWARDS

7

Which 2 things do roots grow towards?

1. Gravity

2. Moisture

8

If a root has an uneven mount of moisture on wither side of the root, will the root grow towards the side with:

a) more moisture?
or
b) less moisture?

a) MORE moisture

9

How does having more auxin on the bottom of the root affect its growth?

The EXTRA auxin INHIBITS growth. This means the TOP will elongate FASTER, and the root bends DOWNWARDS

10

How does having more auxin on the more moist side of the root affect its growth?

The EXTRA auxin INHIBITS growth on that side. This means the root grows TOWARDS the MOISTURE, as the cells on the other side elongate FASTER

11

How are we able to use plant hormones in agriculture?

By extracting or making artificial versions of them

12

Why can selective weedkillers used in crop-fields only affect weeds and and not the crops?

They are made of plant growth hormones so only affect the broad-leafed plants (which in crop-fields are most commonly weeds (think grasses and cereals as crops)).

13

What does using weedkiller on weeds do?

It disrupts their normal growth patterns, which soon kills them (but leaves the crops untouched)

14

When are plant hormones used in agriculture? (2 things)

1. As weedkiller

2. To grow plant cuttings

15

How can you use plant hormones to grow plant cuttings that won't grow in just soil?

By adding rooting powder (contains auxin hormone), so they'll produce roots rapidly and start growing as new plants

16

How can using rooting powder on plant cuttings help planters (think industry)

it helps produce lots of CLONES of a really good plant very QUICKLY

17

What is a strong argument FOR using plant hormones on crops?

If we didn't use weedkillers and rooting powder, we wouldn't be able to grow so much food, which is important for our growing population and consumerist (Western) society