Commercial Use Of Plant Hormones

Question 1

What is the uses of auxin

Answer 1

Killing weeds
Growing from cuttings with root powder
Growing cells in tissue culture

Question 2

What does killing weeds do

Answer 2

Selective weed killers been developed by auxins which only affect Broad leaf plants
Disrupts growth patterns and then kills them

Question 3

What does growing from cuttings with rooting powder do

Answer 3

Cutting is part of plant been cut off
If add root powder which contains auxins they will produce roots rapidly and start growing new plants
Enables producers to produce lots of clones

Question 4

What does growing cells in tissues culture do

Answer 4

Tissue culture used to grow clones of a plant from few cells - auxins need to be added to growth medium to stimulate cells to divide

Question 5

What is Gibberellin

Answer 5

Another type of plant growth hormone- stimulate seed germination, stem growth, flowering

Question 6

What can gibberellin do

Answer 6

-Controlling dormancy- seeds can be treated with gibberellin to alter dormancy and make them germinate at times of year they wouldn’t normally
-Inducing flowering- treated with gibberellin they will flower without any change in environment and make bigger flowers
-growing larger fruits- gibberellin added to seedless fruit they will grow larger to match normal type as seedless fruit DONT grow as much

Question 7

What is ethene

Answer 7

Gas produced by aging parts of plants - influences growth by controlling cell division+ stimulates enzymes that cause fruit to ripen

Question 8

What can ethene do

Answer 8

Sped up ripining fruits while being transported or on plant
- means fruit can be picked when unripe and when get to market it will
Be prefect