plant hormones (role of 5 hormones)

Question 1

what are auxins function?

Answer 1

• maintain apical dominance + inhibit growth of lateral buds into leav
• control tropisms.
• promote cell elongation
• inhibit leaf abscission ie in young plants.

Question 2

what hormones are auxins synergetic to?

Answer 2

• ABA –> both inihbit growth of lateral buds + promote apical dominance

Question 3

which hormones are auxins antagonistic.

Answer 3

ethene -> promotes leaf abscission

cytokinins => override apical dominance

Question 4

what is the function of ethene?

Answer 4

• promote fruit ripening
• leaf abscission
• flowering.

Question 5

what is synergetic to ethene?

Answer 5

• cytokinins -> promote leaf dropping to conserve water in cold temperatures.

Question 6

what is antagonistic to ethene.

Answer 6

• auxins (as plant get older, aux decreases, and thus leaves can drop)
• giberellins (delay fruit ripening)

Question 7

what is ABA function?

Answer 7

• promote seed dormancy + senecence
• stomatal closure in times of water stress.
• promote apical dominance

Question 8

what is ABA synergetic to?

Answer 8

• auxins -> promote apical dominance

Question 9

What is ABA antagonistic to?

Answer 9

• giberrelins –> they promote seed germiiation whilst ABA promotes dormancy
• cytokinins –> overides lateral dominance

Question 10

what are cytokinins function?

Answer 10

delay senescence + promote division + growth

• promote lateral bud growth
• promote leaf abscission in cold temperatures

Question 11

what is synergetic to cytokinins ?

Answer 11

• ethene (leaf abscission)

Question 12

what are gibberellins function?

Answer 12

• promote seed germination , stem elongation

Question 13

which hormones antagonistic to gibberellins

Answer 13

• ABA –> aba promote seed dormancy + promote cell senescence.