THE EFFECT OF INCREASING IBA DOSES ON ROOTING UPON RAPID DIPPING IN THREE GRAPEVINE ROOTSTOCKS GRAFTED WITH SOME GRAPE VARIETIES

Project no. 29716 · Status: Kapanmış (Yayın bekleniyor) · 2023

Summary

This research study involved grafting cuttings from V.vinifera “Cabernet Sauvignon” and V.vinifera “Merlot” grape varieties onto three American rootstocks that are difficult to root, using an omega-shaped grafting machine. (41B, 110R, and 420A rootstocks) and tested the effects of rapid dipping (30 seconds) at increasing doses of IBA (indole butyric acid) (0, 500, 750, 1000, 1250, 1500 ppm). Grafted seedlings planted in 8 cm x 16 cm PAPERpot tubes filled with a 1:1 v/v mixture of peat and perlite were kept under controlled conditions for two months. Callus formation rates and root system quality in grafted vine seedlings were examined using different rooting parameters [root formation rate (scale of 1-4), number of roots (count), root length (cm), fresh and dry root weight (g), shoot length (cm)] and seedling yield (%). Callus formation rates and root system quality in grafted vine cuttings maintained under controlled conditions for two months, as determined by various rooting parameters [root formation rate (1-4 scale), number of roots (count), root length (cm), fresh and dry root weight (g), shoot length (cm)] and seedling yield (%) were examined.For grafted “Cabernet Sauvignon” on 41B rootstock, the 1000 ppm IBA application rate stood out in terms of root development level (0-4 scale) and the 750 ppm IBA dose in terms of seedling yield. In the combination of “Cabernet Sauvignon” grafted onto the 110R rootstock, the 750 ppm IBA application was more effective than other IBA doses in terms of root length (cm), root dry weight (g), and seedling yield (%). In the grafted “Cabernet Sauvignon” with the 420A rootstock, the 1250 ppm IBA dose was effective in terms of the number of roots analysed as a result of IBA applications at different doses.For “Merlot” grafted onto 41B rootstock, the IBA application rate of 1250 ppm stood out in terms of root number (pieces), and the IBA dose of 750 ppm was most effective in terms of root fresh weight (g). In the combination of “Merlot” grafted onto the 110R rootstock, the most effective IBA doses were 500 ppm for root fresh weight (g) and 1000 ppm for seedling yield (%). In the grafted “Merlot” combination with the 420A rootstock, the 1000 ppm and 1250 ppm IBA doses were effective in root number at the analysed root development level.The results obtained from the research indicate that the use of low-cost synthetic hormones contributes to reducing costs and preventing economic losses in grafted vine seedling production.

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