Anatomical and histological studies of Vitis grafting zones. What do we know about the possible causes of this grafting incompatibility?

Project Number
WW ED 12-02

Project leader
Deloire, AJ

Project title
Anatomical and histological studies of Vitis grafting zones. What do we know about the possible causes of this grafting incompatibility?

Institution
Stellenbosch University, Department of Viticulture and Oenology

Team members
Deloire, A J
Kraeva-Deloire, E S

Project description
Every year a certain amount of grafted grapes show what is known in the industry as graft union incompatibility. Although the percentage of affected vines is low, a producer can easily cancel his order which will lead to an economical lost to the nursery in question.

The aims of this research are as follows:
1. Describe and understand the dynamic of callus formation, cambium junction and new cambium functioning over three years in various combinations of Vitis (omega grafting, split grafting, woody and green grafting).
2. Study biochemical markers of grafting incompatibility: phenols, peroxidase and starch (sugars are known to be strong cell to cell signals).
3. Study the effect of wax and hormones during the callus formation
4. Study few nursery conditions on the callus formation and cambium functioning

NO FINAL REPORT

– Record end –

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