commercial uses of plant hormones

Question 1

Auxins stimulate cells to grow and divide, so how can they be used as weedkillers?

Answer 1

• Stimulates too much growth
• Disrupts growth process and so kills the plant

Question 2

What is the benefit of selective weedkillers?

Answer 2

They kill some plants but not all

Question 3

What are three uses of auxins in agriculture and horticulture?

Answer 3

In weedkillers, rooting powders and to promote growth in tissue culture

Question 4

dormancy

Answer 4

Seeds are inactive and do not grow or develop

Question 5

germination

Answer 5

Seeds begin to develop and grow

Question 6

Which plant hormone can stimulate a plant to germinate?

Answer 6

Gibberellin

Question 7

Which hormone is responsible for inducing fruit to ripen?

Answer 7

ethene

Question 8

Explain how ethene is used in the transport of food.

Answer 8

• Ethene stimulates fruit to ripen
• Fruit is picked unripe so that it’s still hard which means it isn’t damaged during transport or storage
• Ethene can then be used to ripen the fruit so that it’s soft for consumers

Question 9

gibberellins

Answer 9

• end seed dormancy
• encourage plants to flower
• make food grow larger

Question 10

ethene

Answer 10

• controls cell division
• controls ripening of fruits
• trigger bananas to ripen