plant responses

Question 1

what are important plant hormones

Answer 1

• auxins
• gibberellin
• Ethene
• ABA ( abscisic acid)

Question 2

what is the role of auxin in plants?

Answer 2

1. ) controls cell elongation
2. ) prevents leaf fall
3. ) maintains apical dominance
4. ) stimulate the release of ethene in involved in fruit ripening

Question 3

what is the role of gibberellins in plants?

Answer 3

1. ) cause stem elongations
2. ) trigger the mobilisation of food stores in a seed at germination
3. ) stimulate pollen tube growth in fertilisation

Question 4

what is the role of ethene in plants?

Answer 4

1. ) causes fruit ripening

2. ) promotes abscission in deciduous trees

Question 5

what is the role of ABA ( abscisic aid)

Answer 5

1. ) maintains dormancy of seeds and buds
2. ) stimulates cold protectives responses
3. ) eg antifreeze production
4. ) stimulates stomatal closing