ISHS Acta Horticulturae 759: XXVII International Horticultural Congress - IHC2006: Global Horticulture: Diversity and Harmony, an Introduction to IHC2006
PRODUCTION OF HIGH QUALITY VEGETABLE SEEDLING GRAFTS |
| Author: | S.G. Lee |
| Keywords: | Curcurbitaceae, Solanaceae, rootstock, scion, grafting |
| DOI: | 10.17660/ActaHortic.2007.759.12 |
| Abstract:
In South Korea, the use of grafted seedlings has been increasingly popular in the production of many fruit-bearing vegetables such as watermelon, cucumber, oriental melon, muskmelon, tomato, eggplant, and red pepper. The main purpose of grafted seedlings is to increase the yield and quality of fruits by combining a disease resistant rootstock with a genetically superior scion. A number of grafting methods have been employed including insertion graft, inarching, and use of inter-stock, approach graft, cleft graft, pin-graft, and side graft. The inarching method of grafting is more popular among Korean vegetable growers because its success rate is not very much affected when a controlled environment grafting facility is unavailable. However, grafting by inarching requires more labor and additional materials as compared with other methods of grafting. This problem may be addressed through the use of an alternative method of grafting, such as insertion grafting or a combination of root pruning and insertion grafting which can be performed with a grafting machine. Successful grafting requires good connection of vascular bundles between the rootstock and the scion, healthy growth and development of the grafted plants, and the growth of grafted plants under optimum environmental conditions. Under suboptimal temperature and low relative humidity conditions, callusing and healing at the graft union are delayed, resulting in a lower grafting success rate. Promotion of cell division from the graft union is optimum under environmental conditions of 25-30°C and 95% or higher relative humidity, which protect the wounded tissues from desiccation. | |
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