Unit 3

Question 1

Give the 9 Internal and External factors that affect rooting in cuttings

Answer 1

1. Physiological Condition of the mother plant
2. Juvenility Factors
3. Presence of Leaves and Buds
4. Type of Wood
5. Position of the basal cut in the cuttings
6. Presence of Virus
7. Treatment of cuttings
8. Season
9. Environmental conditions

Question 2

Cause enlargement of plant cell.

Answer 2

Auxins

Question 3

Stimulate cell division, cell elongation or both

Answer 3

Gibberlins

Question 4

Stimulate cell division in plants

Answer 4

Cytokinins

Question 5

Plant hormones that inhibit or retard a physiological or biochemical
process in plants.

Answer 5

Inhibitors

Question 6

Give the methods of application of growth regulators to stem cuttings for the induction of
roots

Answer 6

1. Quick drip method
2. Prolonged soaking method
3. Powder method
4. Lanolin paste method

Question 7

FACTORS INFLUENCING THE HEALING OF GRAFT UNION

Answer 7

1. Incompatibility
2. Kind of plant
3. Environmental factors during and following grafting
4. Growth activity of the stock plants
5. Propagation techniques

Question 8

The best and most commonly used chemical for rooting acceleration and initiation.

Answer 8

Indole butyric acid (IBA)