ISHS Acta Horticulturae 556: V International Congress on Hazelnut
ASSOCIATION OF PHENOLIC COMPOUNDS WITH CALLUS FORMATION AND GRAFTING SUCCESS IN HAZELNUT |
| Authors: | G.M. Wyzgolik, Z. Piskornik |
| Keywords: | Corylus avellana, Corylus colurna, filbert, grafting, callus tissue, phenolics, endo-dormancy |
| Abstract:
The association of amounts of phenolic compounds with the capability of callus tissue formation and grafting success of hazelnut was investigated using scions of Corylus avellana ‘Warsaw’s Red’ on Turkish tree hazel (Corylus colurna) rootstocks. The grafts were made during the winter months using the hot callusing method. During three successive years, the percentage of grafting success increased gradually from November to March, and similarly the size of callus tissue formed by scions and rootstocks increased gradually during the same period. Also, during this time, there was a significant decline in the level of phenolic compounds in the grafting partners. The correlation coefficients were large and negative (r = -0.92 in 'Warsaw's Red' and r = -0.91 in C. colurna), indicating a negative association between phenolics and tissue regeneration capability both in scions and rootstocks. These results indicate that the high amounts of phenolic compounds, widely known as growth inhibitors, present in tissues during endodormancy, may limit the capability of callus tissue formation and thus lower the grafting success rate. | |
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