Article Info 제27권 2호 강원 농업생명환경연구 Vol.27, No.2, pp.8- 13, 2015
Title Effect of Grafting Position, Water Content in Substrate on the Survival Rate and Quality of Grafted Tomato Seedlings
Author Vu, N. T.1,2 , S. H. Kim1 , T. D. Pham2 and I. S. Kim1*
Institutions 1Department of Horticulture, Kangwon National University, Chuncheon 200-701, Korea
2Faculty of Agronomy, Vietnam National University of Agriculture, Hanoi, Vietnam 
Abstract The objective of this study was conducted to determine effects of grafting position and water content in the substrate on the survival rate and quality of grafted tomato seedlings. Two grafting positions including above and below the rootstock cotyledons were examined. In addition, three water content levels (mid (control), high and low) in the substrate were set up during healing and acclimatization processes. There was no difference in survival rate between two grafting positions, but grafting positions effected on growth of grafted seedlings. The growth parameters and root morphology of seedlings grafted above the rootstock cotyledons were higher than that in seedlings grafted below the rootstock cotyledons, except leaf chlorophyll value and T/R ratio. The maximum survival rate (100%) was observed in mid (control) and high water treatments, but the survival rate (95.3%) decreased in low water treatment. The tallest plant height and largest leaf area were obtained in high water treatment. Leaf chlorophyll content significantly increased in low water treatment. No significant difference was detected among different water treatment with stem diameter, number of leaves. Grafted seedling in low water treatment significantly decreased fresh and dry weight of shoot and root. T/R ratio increased in low water treatment, but it was similar in mid and high water treatments. The high compactness value was observed in mid water treatment. The high values of total root surface area, total root length, and number of root tips were observed in high water treatment. However, there was no significant difference between mid (control) and low water treatments on total root surface area, total root length, and number of toot tips.
Keyword Grafting position, Seedling quality, Survival rate, Tomato, Water content in the substrate.
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