Physiological Processes - Graft Union

Question 1

1

Matching up of vascular cambium of rootstock and scion.

Answer 1

Requires

1. Active cambium
2. High humidity
3. Cambium matching
4. Support
5. Temp. 10c -30c

Question 2

2

Wounding response

Answer 2

Plant cells die when they are cut, resulting in formation of necrotic plate.

Question 3

3

Callus bridge formation

Answer 3

Production and interlocking of meristematic parenchyma which comes from immature xylem and phloem.

Stock produces most callus.

Question 4

4

New cambium formation.

Answer 4

Adjacent callus differentiates to form cambium.

Cambium forms across bridge of callus tissue.

Question 5

5

Production of secondary xylem and phloem.

Answer 5

Produced from new vascular cambium in the callus bridge.